@article{2-s2.0-85180369062,

title = {Weathering alterations of coal mining wastes geochemistry, petrography, and mineralogy, a case study from the Janina and Marcel Coal Mines, Upper Silesian Coal Basin (Poland)},

author = { M.J. Fabiańska and J. Ciesielczuk and M. Szczerba and M. Misz-Kennan and D. Więcław and E. Szram and Á. Nádudvari and Z. Ciesielska},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85180369062&doi=10.1016%2fj.coal.2023.104407&partnerID=40&md5=7f614415c47e1227af2cb9b820a07022},

doi = {10.1016/j.coal.2023.104407},

issn = {01665162},

year  = {2024},

date = {2024-01-01},

journal = {International Journal of Coal Geology},

volume = {281},

publisher = {Elsevier B.V.},

abstract = {Weathering-caused alterations in coal mining waste geochemistry, petrography, and mineralogy occurring in the known time span of 1998–2018 in the temperate climate of Poland were investigated. A series of coal mining waste rocks representing two parts of the Upper Silesian Coal Basin (USCB), differing in coalification stage, i.e., corresponding to sub-bituminous and bituminous coals, have been selected to find how the level of organic matter conditionates the weathering. Differences in organic matter content, petrographic composition, rock mineralogy and inorganic geochemistry were also taken into account. Whereas organic petrography, including vitrinite reflectance values, do not show significant weathering signs, apart from irregular cracks and, in very rare cases, paler in color oxidation rims, organic geochemistry has been affected due to low-temperature secondary processes, including increased oxygen index values, particularly in less mature coal mining wastes. Biomarker distribution has been changed to the largest extent, with partial removal of n-alkanes possibly due to biodegradation of organic matter and water-washing of lighter polycyclic aromatic hydrocarbons, including alkyl naphthalenes. Organic matter of lower maturity in coal mining wastes from the USCB eastern part, as more reactive, showed a higher level of secondary transformations. Minerals formed during weathering due to time and storage on dumps were mainly oxidation products of iron sulphides: goethite and jarosite; however, most of the minerals have not been altered. Thus, despite physical changes in coal mining wastes, such as increased brittleness, decreasing fragment size and surface color change, there are only limited changes in inorganic chemistry and mineralogy. This indicates that low-temperature processes do not favour the inorganic elements release to the environment and points out that measures to prevent self-heating within the dumps are the most vital part of post-mining activity leading to the best scenario - slow low-temperature weathering of coal mining wastes. © 2023 Elsevier B.V.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85178139519,

title = {Organic minerals in a self-heating coal-waste dump in Upper Silesia, Poland: Structure, formation pathways and environmental issues},

author = { Á. Nádudvari and T. Krzykawski and M. Jabłońska and M.J. Fabiańska and K. Skrzyńska and A.K. Abramowicz and M. Książek and J. Ciesielczuk},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85178139519&doi=10.1016%2fj.coal.2023.104403&partnerID=40&md5=94234ee56c791a04257a02baf301f8af},

doi = {10.1016/j.coal.2023.104403},

issn = {01665162},

year  = {2024},

date = {2024-01-01},

journal = {International Journal of Coal Geology},

volume = {281},

publisher = {Elsevier B.V.},

abstract = {The study presents research on the unusual appearance of purple-colored organic minerals, ravatite (phenanthrene) and freitalite (anthracene), occurring in the migrating front wall of a heating spot in the Bytom coal waste dump (Upper Silesia Coal Basin; Poland). These minerals are known to be sublimation products, but their formation mechanism remains unclear. Additional minor components are fluorene, dibenzothiophene, naphthothiophenes, dibenzofuran, and their alkyl-derivatives, and n-C17 – n-C20 alkanes. Temperatures were surprisingly low (30–60 °C on the surface) at the sampling sites, though such large amounts of Polycyclic Aromatic Hydrocarbons (PAHs) typically form in a burning environment where temperatures reach 800–1000 °C. The relatively low temperatures suggest that the primary mechanism of formation was not direct evaporation (desublimation) of phenanthrene and anthracene from coal-waste gases but that their occurrence may reflect a catalytical polymerization of ethylene on iron (III) chloride synthesized in a reaction between HCl and a common Fe mineral such as goethite. Subsequently, both minerals crystallized on the cold dump surface. High concentrations of phenanthrene and anthracene in self-heating products, testified by ravatite and freitalite, mean that self-heating of coal waste may significantly increase backgrounds of environmental pollution by PAHs. © 2023 Elsevier B.V.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85160813148,

title = {Toward an Astrochronology-Based Age-Model for a Messinian Pre-Evaporitic Succession: The Example of Torrente Vaccarizzo Section in Sicily (Italy)},

author = { R. Maniscalco and M. Forzese and V. Barbagallo and L. Borzì and N.M. D’Andrea and S. Distefano and C. Giustolisi and Á. Nádudvari and A.G. Pellegrino and L.M. Foresi and A. Di Stefano},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85160813148&doi=10.3390%2fjmse11050915&partnerID=40&md5=bc0c5ad0d8e8e8a76b51902f826073ae},

doi = {10.3390/jmse11050915},

issn = {20771312},

year  = {2023},

date = {2023-01-01},

journal = {Journal of Marine Science and Engineering},

volume = {11},

number = {5},

publisher = {MDPI},

abstract = {Tectonic, paleoenvironmental, and paleoclimatic unstable conditions preceding the onset of the Messinian Salinity Crisis (MSC) highly affected marine life. Changes in calcareous plankton association are overall registered in the Mediterranean. They consist of a general transition from abundant and well-diversified planktonic associations to strictly oligotypic assemblages that precede their total disappearance at the onset of evaporitic precipitation. In this work, an accurate quantitative analysis of calcareous plankton, both foraminifers and nannofossils, has been carried out in the Torrente Vaccarizzo Section of Sicily (southern Italy). The aim is to independently define a chronostratigraphic pattern of bioevents preceding the MSC in the absence of magnetostratigraphic or radiometric constraints. The fluctuating abundance of the genus Orbulina fits well with the 100 ky Eccentricity maxima, and it is successfully applied to build an astronomically calibrated age-model for the section. On this basis, all the biohorizons have been recalibrated and discussed with regard to the previous literature. Abundant influxes of selected species demonstrated to be of local significance since they are highly affected by paleoenvironmental and paleoclimatic conditions. A chronological sequence of foraminifer and nannofossil events marks the onset of the MSC with a derived age of 5.957 My, which agrees well with previous findings from other Mediterranean sections. This methodology and the new biostratigraphic events may be useful for future studies on pre-evaporitic successions of the Mediterranean. © 2023 by the authors.},

note = {2},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85147541252,

title = {Preservation of labile organic compounds in sapropelic coals from the Upper Silesian Coal Basin, Poland},

author = { Á. Nádudvari and M. Misz-Kennan and M.J. Fabiańska and J. Ciesielczuk and T. Krzykawski and B.R.T. Simoneit and L. Marynowski},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85147541252&doi=10.1016%2fj.coal.2023.104186&partnerID=40&md5=396c170a48381df292c872f303db8608},

doi = {10.1016/j.coal.2023.104186},

issn = {01665162},

year  = {2023},

date = {2023-01-01},

journal = {International Journal of Coal Geology},

volume = {267},

publisher = {Elsevier B.V.},

abstract = {Sapropelic coals were taken for study from coal mines and coal waste dumps in Upper Silesian Coal Basin (USCB), Poland. They showed unusual molecular compositions reflecting immature characteristics. The vitrinite reflectances 0.65-1.00% indicated mature organic matter (OM) and agreed with the Rock Eval Tmax (421-444oC). The OM maturity also was supported by the geochemical ratios, i.e., alkylnaphthalenes, dimethylphenanthrenes, methylbiphenyls and dibenzofuran or phenol and its methyl derivatives in the southern part of USCB. The petrographic features showed fine-grained and laminated OM, which is typical for sapropel with a dominance of vitrinite and inertinite macerals. The presence of fusinites and natural chars reflects paleowildfires prior to coal formation and/or peat fires. It is also confirmed by the presence of anthracene, methyl-anthracenes, and oxygen-containing aromatic compounds like anthrone, xanthone, fluorenone, and benzofluoren-11-ones. Rock Eval pyrolysis data showed very similar values as the humic coals from USCB, except for the elevated values of S2 (residual petroleum potential) and Hydrogen Index (HI) reflecting the presence of hydrogen-rich liptinite macerals. The distributions of n-alkanes, methylalkanes, alkylcyclohexanes and alkylbenzenes indicate a microbiological origin associated with microorganisms, including cyanobacteria or Botryococcus. In all samples 8β(H)-homodrimane dominated and indicated an anoxic environment of the deep lakes. The preservation of tetracyclic diterpenoids, diaster-13(17)-enes, ββ-hopanes, simonellite, bisnorsimonellite, cadalene, fatty acids, aromatic aldehydes and carboxylic acids from lignin degradation in sapropelic hard coals indicates an early diagenetic generation of these compounds from sapropels. Furthermore, during coalification, some the less thermally labile compounds can be preserved with increasing coal rank, while others isomerized or aromatized to more stable counterparts. © 2023 Elsevier B.V.},

note = {6},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85146811874,

title = {Patterns of Recent Changes in Channel Morphology and Flows in the Upper and Middle Odra River},

author = { Á. Nádudvari and A. Czajka and B. Wyżga and M. Zygmunt and M. Wdowikowski},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85146811874&doi=10.3390%2fw15020370&partnerID=40&md5=e21852d27838fa5296fe5eb535864ff3},

doi = {10.3390/w15020370},

issn = {20734441},

year  = {2023},

date = {2023-01-01},

journal = {Water (Switzerland)},

volume = {15},

number = {2},

publisher = {MDPI},

abstract = {Our research introduces the river regulation effects on three sections of the upper and middle Odra River (south-western Poland), with differently channelized parts. In the upper and lower reaches, the river was straightened, narrowed, and trained with groins, whereas in the middle section, it was also impounded by numerous barrages. The discharge duration (DD) and water stage duration (WSD) curves for water-gauge stations from these river sections were analyzed to recognize changes in river flows and channel morphology since the mid-20th century. This analysis is supplemented by an examination of repeated surveys of the gauge cross sections of the river, annual precipitation totals in its catchment, and their relationship to the variation of the North Atlantic Oscillation (NAO) index. Our findings provide new hydrological insights for the region. The three river sections exhibited different patterns of the adjustment of the channel morphology to the river channelization: upper section was typified by channel incision, middle section by channel stability, and lower section by channel incision in its upper part and vertical stability of the channel bed in the lower part. Barrages in the middle section stabilized water stages in a wide range of hydrological conditions. Annual precipitation totals and river run-off did not change systematically over the study period. The variation in precipitation totals was inversely related to annual values of the NAO index. The study confirms the usefulness of DD/WSD curves to analyze changes in river run-off and the vertical position of the channel bed. © 2023 by the authors.},

note = {7},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85136342066,

title = {Soil and Vegetation Development on Coal-Waste Dump in Southern Poland},

author = { O. Rahmonov and A. Czajka and Á. Nádudvari and M. Fajer and T. Spórna and B. Szypuła},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85136342066&doi=10.3390%2fijerph19159167&partnerID=40&md5=9b73e6a62adcbfa769cb65f068547a92},

doi = {10.3390/ijerph19159167},

issn = {16617827},

year  = {2022},

date = {2022-01-01},

journal = {International Journal of Environmental Research and Public Health},

volume = {19},

number = {15},

publisher = {MDPI},

abstract = {As an anthropogenic element of urban landscapes, coal heaps undergo changes due to both natural and anthropogenic factors. The aim of this study was to determine the common development of soil under the influence of vegetation succession against a background of environmental conditions. Vegetation changes and soil properties were analysed along a transect passing through a heap representing a particular succession stage. It was found that changes in the development of vegetation were closely related to the stages of coal-waste disposal, where the initial, transitional, and terminal stages were distinguished. The mean range of pH (H2O) values in the profiles was 6.75 ± 0.21 (profile 1), 7.2 ± 0.31 (profile 2), 6.3 ± 1.22 (profile 3), and 5.38 ± 0.42 (profile 4). The organic carbon (OC) content in all samples was high, ranging from 9.6% to 41.6%. The highest content of total nitrogen (Nt) was found (1.132%) in the algal crust and sub-horizon of the organic horizon (Olfh-0.751%) and humus (A-0.884) horizon in profile 3 under the initial forest. Notable contents of available elements were found in the algal shell for P (1588 mg∙kg−1) and Mg (670 mg∙kg−1). Soil organic matter content was mainly dominated by n-alkanes (n-C11-n-C34) and alkanoic acids (C5–C20). Phytene and Phytadiene were typical for the algal crust on the initial pedigree. The initiation of succession was determined by the variation in grain size of the waste dumped on the heap and the variation in relief and associated habitat mosaic. Algal crusts forming on clay–dust mineral and organic material accumulating in the depressions of the site and at the foot of the heap can be regarded as the focus of pedogenesis. © 2022 by the authors.},

note = {6},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85135313507,

title = {The transition toward the Messinian evaporites identified by biomarker records in the organic-rich shales of the Tripoli Formation (Sicily, Italy)},

author = { Á. Nádudvari and M. Forzese and R. Maniscalco and A. Di Stefano and M. Misz-Kennan and L. Marynowski and T. Krzykawski and B.R.T. Simoneit},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85135313507&doi=10.1016%2fj.coal.2022.104053&partnerID=40&md5=d95062882491fd96c91734503951577e},

doi = {10.1016/j.coal.2022.104053},

issn = {01665162},

year  = {2022},

date = {2022-01-01},

journal = {International Journal of Coal Geology},

volume = {260},

publisher = {Elsevier B.V.},

abstract = {Pre-evaporitic Messinian deposits, consisting of a cyclic alternation of diatomites with lime mudstones, and laminated marls, crop out all over the Mediterranean area, representing important archives of deteriorating environmental conditions. The peculiar section of Torrente Vaccarizzo (Sicily) shows several intervals of organic-rich shales, exceptionally high in lipid biomarkers, interbedded mostly with diatomites, laminites, and lime mudstones. This research deals with geochemical analyses of organic-rich shales to characterize the depositional environments and the organic matter source, as well as to investigate the biological archives predating the extreme saline conditions of the Messinian Salinity Crisis. The biomarker compositions with the petrographic results reflect a change from oxic/dysoxic to dysoxic/anoxic conditions towards younger strata. Although a minor terrestrial input is displayed by saccharides and angiosperm biomarkers, such as amyrins, dicarboxylic acids, and lignin degradation products, most of the n-alkanes, isoprenoids, n-alkanoic acids, steroids, hopanes, and tocopherols are produced by marine hypersaline tolerant organisms. Sulfurization of organic compounds (mainly isoprenoids and n-alkanols) complements the pyrite mineralogy also indicating anoxia. The assessment of kerogen by Rock Eval pyrolysis revealed a moderate-good oil potential and indicated thermally immature organic matter, which is also confirmed by multiple geochemical parameters (e.g. hopane; sterane). Bituminite at this stage of thermal maturity is not prone to hydrocarbon generation, but depends on the degree of bacterial alteration. This work highlights the relevance of using biomarkers to characterize the response of biological communities to deteriorating environmental conditions. © 2022 Elsevier B.V.},

note = {1},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85125539700,

title = {High concentrations of HgS, MeHg and toxic gas emissions in thermally affected waste dumps from hard coal mining in Poland},

author = { Á. Nádudvari and J. Cabała and L. Marynowski and M. Jabłońska and M. Dziurowicz and D. Malczewski and B. Kozielska and P. Siupka and Z. Piotrowska-Seget and B.R.T. Simoneit and M. Szczyrba},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85125539700&doi=10.1016%2fj.jhazmat.2022.128542&partnerID=40&md5=dc4d622cf940b6c3ae23b6a2bebc9f65},

doi = {10.1016/j.jhazmat.2022.128542},

issn = {03043894},

year  = {2022},

date = {2022-01-01},

journal = {Journal of Hazardous Materials},

volume = {431},

publisher = {Elsevier B.V.},

abstract = {This study aims to provide numerous environmental research approaches to understand the formation of mineral and organic mercury compounds in self-heating coal waste dumps of the Upper Silesian Coal Basin (USCB). The results are combined with environmental and health risk assessments. The mineralogy comprised accessory minerals in the fine fraction of thermally affected waste, i.e., Hg sulfides, most likely cinnabar or metacinnabar. Moreover, other metals, e.g., Pb, Zn and Cu, were found as sulfide forms. Apart from Hg, the ICP-ES/MS data confirmed the high content of Mn, Zn, Pb, Hg, Cr and Ba in these wastes. The high concentration of available Hg resulted in elevated MeHg concentrations in the dumps. There were no correlations or trends between MeHg concentrations and elemental Hg, TS, TOC, and pH. Furthermore, we did not detect microbial genes responsible for Hg methylation. The organic compounds identified in waste and emitted gases, such as organic acids, or free methyl radicals, common in such burn environments, could be responsible for the formation of MeHg. The concentration levels of gases, e.g., benzene, formaldehyde, NH3, emitted by the vents, reached or surpassed acceptable levels numerous times. The potential ecological and human health risks of these dumps were moderate to very high due to the significant influence of the high Hg concentrations. © 2022 Elsevier B.V.},

note = {4},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85112594413,

title = {Changes in soil chemical composition caused by self-heating of a coal-waste dump},

author = { A.K. Abramowicz and O. Rahmonov and M.J. Fabiańska and Á. Nádudvari and R. Chybiorz and M.P. Michalak},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85112594413&doi=10.1002%2fldr.4040&partnerID=40&md5=6dbe689c6759100989dc9f16584ba8ff},

doi = {10.1002/ldr.4040},

issn = {10853278},

year  = {2021},

date = {2021-01-01},

journal = {Land Degradation and Development},

volume = {32},

number = {15},

pages = {4340-4349},

publisher = {John Wiley and Sons Ltd},

abstract = {The paper presents soil features and chemical composition in a self-heating coal-waste dump. The investigations were carried out in the Upper Silesian Coal Basin. A fire zone in which the soil temperature exceeded 50°C was selected for our study. Soil analyses were carried out for three grain sizes – d > 1 mm, 0.063 mm < d ≤ 1 mm, and d ≤ 0.063 mm – enabling identification of the diversity of the chemical composition in soil fractions. The highest concentration of heavy metals is represented by Mn (212–6972 mg kg-1), Zn (127–3283 mg kg-1), Pb (33.6–1344.7 mg kg-1), Cu (38.9–101.4 mg kg-1), and major elements by Fe (14;300–117;400 mg kg-1) and Ca (900–63;600 mg kg-1). Soil chemistry showed variations within individual studied sites. The soil reaction ranges from acidic (4.3 in KCl and 5.26 in H2O) to moderate alkaline (7.96 in H2O and 7.31 in KCl), whereas TOC ranges from 1.21% to 14.60% and TN from 0.023% to 0.291%. The distribution of n-alkanes clearly showed a low degree of transformation of organic matter and characteristic high values of Pr/Ph ratio for humic coals and coal waste in the region. Grains with diameters greater than 1 mm exhibited completely different features than those of fractions smaller than or equal to 1 mm. High organic carbon content (14.60) was detected in the samples along with PAHs. The influence of fire on the chemical composition of all samples was identified using geochemical indicators. PCA analysis showed that the values of the variables were more closely correlated in finer grains than in the coarsest fraction. © 2021 John Wiley & Sons, Ltd.},

note = {3},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85105377903,

title = {Selected ions and major and trace elements as contaminants in coal-waste dump water from the Lower and Upper Silesian Coal Basins (Poland)},

author = { L. Lewińska-Preis and E. Szram and M.J. Fabiańska and Á. Nádudvari and M. Misz-Kennan and A.K. Abramowicz and Ł. Kruszewski and A. Kita},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85105377903&doi=10.1007%2fs40789-021-00421-9&partnerID=40&md5=4b9123027922bf299128dda7f296b4dd},

doi = {10.1007/s40789-021-00421-9},

issn = {20958293},

year  = {2021},

date = {2021-01-01},

journal = {International Journal of Coal Science and Technology},

volume = {8},

number = {4},

pages = {790-814},

publisher = {Springer International Publishing},

abstract = {Many temporary and permanent reservoirs of water occur on or near coal-waste dumps in the Lower- and Upper Silesian Coal Basins (Poland). Little or nothing is known of the degree to which their water chemistry might reflect (i) reservoir type, i.e., whether permanent or temporary, (ii) level of coal-waste thermal activity, i.e., whether inactive or self-heating or burnt-out or (iii) region, i.e., whether the dumps are in Upper- or Lower Silesia. To provide some answers, concentrations of selected ions (NH4+; HCO3−; F−; Cl−; Br−; NO2−; NO3−; PO43−;SO42−) were determined by ion chromatography and of nineteen elements (Al; B; Ba; Ca; Cd; Cr; Cu; Fe; K; Li; Mg; Mn; Na; P; Pb; S; Si; Sr; Zn) by inductively coupled plasma mass spectrometry (ICP-MS). The data allow a number of the following observations. When permanent reservoirs are considered, there is a clear relationship between concentrations of ions and major and trace elements and dump thermal activity. The highest concentrations occur where the thermal activity is high as inorganic components are transformed into more water-soluble forms. As dump thermal activity shows a regional pattern, it follows also that elemental and ion concentrations in the dump waters show significant regional differences. In temporary reservoirs, concentrations of ions and major and trace elements are much lower and any correlations between components less significant than in the permanent reservoirs; these reservoirs exist for too short a time for any balance between coal waste- and water components to be established. © 2021, The Author(s).},

note = {7},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85100541579,

title = {Heavy metal- and organic-matter pollution due to self-heating coal-waste dumps in the Upper Silesian Coal Basin (Poland)},

author = { Á. Nádudvari and B. Kozielska and A.K. Abramowicz and M.J. Fabiańska and J. Ciesielczuk and J. Cabała and T. Krzykawski},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85100541579&doi=10.1016%2fj.jhazmat.2021.125244&partnerID=40&md5=07ef9df8d36be53a4c471da5c1dfc7c6},

doi = {10.1016/j.jhazmat.2021.125244},

issn = {03043894},

year  = {2021},

date = {2021-01-01},

journal = {Journal of Hazardous Materials},

volume = {412},

publisher = {Elsevier B.V.},

abstract = {This study provides potential insight between self-heating coal-waste dumps and related environmental pollution in southern Poland. Samples collected from dumps in the Upper Silesian Coal Basin were used to quantify released contents of organic- and inorganic pollutants, i.e., polycyclic aromatic hydrocarbons (PAHs) and trace elements (Pb; Cd; Cr; Cu; Zn; Ni; Hg; As). Elevated Hg concentrations (~100–1078 mg/kg) and Pb (~600–2000 mg/kg) attest to the evaporation of these metals from deeper parts of the dumps. The acidic pH levels (3.0–4.5) may help to mobilize these elements. Pearson's correlation coefficients for samples analyzed by AAS and ICP-MS indicate a similar origin for Cd, Zn, and As. Mostly 2- and 3-ring PAHs, especially anthracene in burnt soil, dominate in the samples. Chlorinated PAHs, thiophenol, pyridines, quinolines (and derivatives) in thermally-altered samples, and waste containing pyrolytic bitumen indicate coking conditions. The high levels of Hg, Pb, and Cd, and chlorinated PAHs and nitrogen heterocycles formed or enriched during self-heating in these dumps should be deemed a significant environmental hazard. Calculating the lifetime cancer risks due to PAHs and heavy metals accumulations in the dumps are substantial, and access to these dumps should be prohibited. © 2021 Elsevier B.V.},

note = {12},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85095782590,

title = {Classification of fires in coal waste dumps based on Landsat, Aster thermal bands and thermal camera in Polish and Ukrainian mining regions},

author = { Á. Nádudvari and A.K. Abramowicz and M.J. Fabiańska and M. Misz-Kennan and J. Ciesielczuk},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85095782590&doi=10.1007%2fs40789-020-00375-4&partnerID=40&md5=7736bce653d78699a57d68b740b66fd5},

doi = {10.1007/s40789-020-00375-4},

issn = {20958293},

year  = {2021},

date = {2021-01-01},

journal = {International Journal of Coal Science and Technology},

volume = {8},

number = {3},

pages = {441-456},

publisher = {Springer International Publishing},

abstract = {A self-heating intensity index (SHII) based on the highest (pixel max.) and lowest (pixel min.) values taken from satellite thermal maps of burning coal waste dumps are proposed. The index enables the classification of such fires in Ukrainian- and Polish coal waste dumps. Both in Ukraine and in Poland, varying thermal intensities during 1985–2019 are revealed, using the SHII and following thermal intensity threshold values, namely, extreme thermal activity (> 7), advanced (3–7), moderate (3–1.5), initial (1.5–1), no activity (< 1). The SHII shows decreasing thermal activity in the selected Ukrainian coal waste dumps during 2017–2019. It aids in reconstructing the thermal history of the dumps. Analysis of satellite images revealed a large number of burning coal waste dumps in the Donetsk Coal Basin (Ukraine) with high thermal activity. Such burning likely reflects large amounts of organic matter and sulphides in the dumped material subjected to self-heating and self-burning processes, lack of compaction of the coal waste and/or high methane contents. Comparison of SHII values calculated from satellite- and drone thermal-camera images were compared to show that SHII from drone thermal images have much higher values than those from satellite images; the former have better resolution. Thus, SHII from Landsat- and drone images should be used separately in dump heating studies. © 2020, The Author(s).},

note = {15},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85104353509,

title = {The localization of urban heat island in the katowice conurbation (Poland) using the combination of land surface temperature, normalized difference vegetation index and normalized difference built-up index},

author = { Á. Nádudvari},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85104353509&doi=10.7163%2fGPol.0196&partnerID=40&md5=f272a0aba5376ae9705a1c3c908fc46e},

doi = {10.7163/GPol.0196},

issn = {00167282},

year  = {2021},

date = {2021-01-01},

journal = {Geographia Polonica},

volume = {94},

number = {1},

pages = {111-129},

publisher = {Polska Akademia Nauk},

abstract = {The localization of Surface Urban Heat Island (SUHI) as a potential heat risk for the urban population was evaluated. The paper aimed to propose an approach to quantify and localize (SUHI) based on Landsat series TM, ETM+, OLI satellite imageries from the period 1996-2018 and recognize the Atmospheric Urban Heat Island (AUHI) effects from long term temperature measurements. Using the theoretical relation between the Normalized Difference Built-up Index (NDBI), the Normalized Difference Vegetation Index (NDVI) and the LST (Land Surface Temperature), SUHIintensity and SUHIrisk.. maps were created from the combination of LST, NDVI, NDBI using threshold values to localize urban heat island in the Katowice conurbation. Negative values of SUHI intensity characterize areas where there is no vegetation, highly built-up areas, and areas with high surface temperatures. The urban grow - revealed from SUHI - and global climate change are acting together to strengthen the global AUHI effect in the region as the temperature measurements were indicated. © Adam Nadudvari.},

note = {1},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85090054667,

title = {Organic contaminants of coal-waste dump water in the Lower- and Upper Silesian Coal Basins (Poland)},

author = { M.J. Fabiańska and Á. Nádudvari and J. Ciesielczuk and E. Szram and M. Misz-Kennan and D. Więcław},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85090054667&doi=10.1016%2fj.apgeochem.2020.104690&partnerID=40&md5=48996f1ecc723173fab6270181a20d34},

doi = {10.1016/j.apgeochem.2020.104690},

issn = {08832927},

year  = {2020},

date = {2020-01-01},

journal = {Applied Geochemistry},

volume = {122},

publisher = {Elsevier Ltd},

abstract = {Organic phases in the waters of permanent- and temporary reservoirs located on and near coal-waste dumps in Upper- and Lower Silesia, Poland, include recent compounds of biogenic origin, geochemical compounds (biomarkers), dissolved products of coal-waste self-heating, and anthropogenic markers. Due to their adverse environmental- and health effects, the concentration levels of two compound groups were assessed, namely, polycyclic aromatic hydrocarbons (PAHs) and organic phosphates (OPEs). Their occurrence depends on whether sampling sites were thermally active or not. The predominant source of organic compounds in coal-waste dump water at thermally active sites is organic matter from coal waste. Products of self-heating dissolved in water include phenolic compounds, light ketones, organic acids, and PAHs showing the highest concentrations. OPEs are present only at thermally active sites where firefighting operations had taken place recently. These most probably derived from pump lubricants and/or the diesel engines of heavy-duty equipment such as excavators and bulldozers as no fire retardants were used. Biomarker- and PAHs ratios indicative of air particulate contamination prevail at sites where any thermal activity had ceased long ago. Traffic emission from nearby settlements seems to be the main source of organic compounds at such sites as the biomarkers indicate a crude-oil related source. © 2020 Elsevier Ltd},

note = {4},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85089843140,

title = {The estimation of lava flow temperatures using landsat night-time images: Case studies from eruptions of Mt. Etna and Stromboli (Sicily, Italy), Kilauea (Hawaii Island), and Eyjafjallajökull and Holuhraun (Iceland)},

author = { Á. Nádudvari and A.K. Abramowicz and R. Maniscalco and M. Viccaro},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85089843140&doi=10.3390%2fRS12162537&partnerID=40&md5=a000ec013664483c5f3d1fb12cf5c6ea},

doi = {10.3390/RS12162537},

issn = {20724292},

year  = {2020},

date = {2020-01-01},

journal = {Remote Sensing},

volume = {12},

number = {16},

publisher = {MDPI AG},

abstract = {Using satellite-based remote sensing to investigate volcanic eruptions is a common approach for preliminary research, chiefly because a great amount of freely available data can be effectively accessed. Here, Landsat 4-5TM, 7ETM+, and 8OLI night-time satellite images are used to estimate lava flow temperatures and radiation heat fluxes from selected volcanic eruptions worldwide. After retrieving the spectral radiance, the pixel values were transformed into temperatures using the calculated calibration constants. Results showed that the TIR and SWIR bands were saturated and unable to detect temperatures over the active lava flows. However, temperatures were effectively detected over the active lava flows in the range ~500-1060 °C applying the NIR-, red-, green- or blue-band. Application of the panchromatic band with 15 m resolution also revealed details of lava flow morphology. The calculated radiant heat flux for the lava flows accords with increasing cooling either with slope or with distance from the vent. © 2020 by the authors.},

note = {6},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85077690642,

title = {Correction to: Investigation of organic material self-heating in oxygen-depleted condition within a coal-waste dump in Upper Silesia Coal Basin, Poland (Environmental Science and Pollution Research, (2020), 27, 8, (8285-8307), 10.1007/s11356-019-07336-8)},

author = { Á. Nádudvari and M.J. Fabiańska and M. Misz-Kennan and J. Ciesielczuk and A. Kowalski},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85077690642&doi=10.1007%2fs11356-020-07688-6&partnerID=40&md5=fe5a69a01cc526237c33c998cee7b8bf},

doi = {10.1007/s11356-020-07688-6},

issn = {09441344},

year  = {2020},

date = {2020-01-01},

journal = {Environmental Science and Pollution Research},

volume = {27},

number = {8},

pages = {8308-8309},

publisher = {Springer},

abstract = {The original publication of this paper contains a mistake. The correct caption of figures 7 and 8 is shown in this paper. The original article was corrected. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85077566195,

title = {Investigation of organic material self-heating in oxygen-depleted condition within a coal-waste dump in Upper Silesia Coal Basin, Poland},

author = { Á. Nádudvari and M.J. Fabiańska and M. Misz-Kennan and J. Ciesielczuk and A. Kowalski},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85077566195&doi=10.1007%2fs11356-019-07336-8&partnerID=40&md5=7ce4d37003127eb4389089804172f697},

doi = {10.1007/s11356-019-07336-8},

issn = {09441344},

year  = {2020},

date = {2020-01-01},

journal = {Environmental Science and Pollution Research},

volume = {27},

number = {8},

pages = {8285-8307},

publisher = {Springer},

abstract = {Self-heating occurring was studied in the Bytom coal-waste dump using petrographic, mineralogical, and organic geochemical to assess the changes induced by heating on organic material and quantify—qualify the emitted gases. The distribution of geochemical markers such as n-alkanes, alkylbenzenes, alkylcyclohexanes, phenols, sulfurous compounds, and emitted gases in the waste dump is outlined. Heating of organic material there is indicated by high vitrinite random reflectance (Rr)% values that typically characterize samples with short-chain n-alkanes, alkylbenzenes, and alkylmethylbenzenes. Contents of minerals showing minor alterations are high with ~ 90% in burned-out samples. Inside the dump where temperatures can reach up to 700–1300 °C and oxygen contents are significantly reduced, conditions favor coking. This situation is confirmed by the formation of enormous quantities of phenols and alkylbenzenes or by elevated amounts of H2 formed under low-oxygen conditions (pyrolysis). Aromatization, pyrolysis (thermal cracking), and oxidation are associated with the heating in the dump. Gases such as methane, ethane, propane, and ethylene formed during self-heating can serve as fuel for the fire inside the dump, in the process generating huge amounts of CO2. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.},

note = {6},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85050625053,

title = {Environmental influence of gaseous emissions from self-heating coal waste dumps in Silesia, Poland},

author = { M.J. Fabiańska and J. Ciesielczuk and Á. Nádudvari and M. Misz-Kennan and A. Kowalski and Ł. Kruszewski},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85050625053&doi=10.1007%2fs10653-018-0153-5&partnerID=40&md5=c5a0b38aa7c4f20c4547fc77791043de},

doi = {10.1007/s10653-018-0153-5},

issn = {02694042},

year  = {2019},

date = {2019-01-01},

journal = {Environmental Geochemistry and Health},

volume = {41},

number = {2},

pages = {575-601},

publisher = {Springer Netherlands},

abstract = {Gaseous emissions from seven self-heating coal waste dumps in two large coal mining basins, Upper and Lower Silesia (Poland), were investigated by gas chromatography (GC-FID/TCD), and the results were correlated with on-site thermal activity, stage of self-heating as assessed by thermal mapping, efflorescences, and surface and subsurface temperatures. Though typical gases at sites without thermal activity are dominated by atmospheric nitrogen and oxygen, methane and carbon dioxide are present in concentrations that many times exceed atmospheric values. On average, their concentrations are 42.7–7160 ppm, respectively. These are levels considered harmful to health and show that coal waste fire can be dangerous for some years after extinction. At thermally active sites, concentrations of CH 4 and CO 2 are much higher and reach 5640–51,976 ppm (aver.), respectively. A good substrate–product correlation between CO 2 and CH 4 concentrations indicates rapid in-dump CH 4 oxidation with only insignificant amounts of CO formed. Other gas components include hydrogen, and C 3 –C 6 saturated and unsaturated hydrocarbons. Decreasing oxygen content in the gases is temperature-dependent, and O 2 removal rapidly increased at > 70 °C. Emission differences between both basins are minor and most probably reflect the higher maturity of coal waste organic matter in the Lower Silesia dumps causing its higher resistance to temperature, or/and a higher degree of overburning there. © 2018, The Author(s).},

note = {16},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85051625696,

title = {Application of organic environmental markers in the assessment of recent and fossil organic matter input in coal wastes and river sediments: A case study from the Upper Silesia Coal Basin (Poland)},

author = { Á. Nádudvari and L. Marynowski and M.J. Fabiańska},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85051625696&doi=10.1016%2fj.coal.2018.07.012&partnerID=40&md5=9d11f7bdcd8d443e2f69d4c29a115f31},

doi = {10.1016/j.coal.2018.07.012},

issn = {01665162},

year  = {2018},

date = {2018-01-01},

journal = {International Journal of Coal Geology},

volume = {196},

pages = {302-316},

publisher = {Elsevier B.V.},

abstract = {Various types of coal waste material (fresh; self-heated; soil-covered) and river sediments polluted by coal dust were studied. Characteristic geochemical features of recent vegetation input in river sediments were identified, e.g. the dominance of n-alkanols and n-alkanoic acids over n-alkanes. In the river sediments, several coal-related compounds were also found, e.g. n-alkylbenzenes, acetophenone and methylated phenols. The occurrence of sterols, stanols, vanillin, and methylbenzoic, benzeneacetic, oxalic, succinic and levulinic acids in coal waste samples (with the exception of fresh coal wastes) may indicate primitive soil-forming processes related to vegetation and moss cover. These compounds were also commonly identified in river sediments. Their distribution, characteristic of extant (as opposed to fossil) organic matter, was confirmed by several applied geochemical ratios, such as the EOP index (even-over-odd predominance) of fatty acids, (Σn-alkanoic acid + Σlong chain n-alkanes)/Σshort chain n-alkanes or (Σn-alkanoic acids + Σn-alkanols)/Σn-alkanes and various CPI (carbon preference indexes of n-alkanes). © 2018 Elsevier B.V.},

note = {5},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85042229293,

title = {Distribution of coal and coal combustion related organic pollutants in the environment of the Upper Silesian Industrial Region},

author = { Á. Nádudvari and M.J. Fabiańska and L. Marynowski and B. Kozielska and J. Konieczyński and D. Smołka-Danielowska and S.R. Ćmiel},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85042229293&doi=10.1016%2fj.scitotenv.2018.02.092&partnerID=40&md5=3b5271907fc1892434654c77fe63435b},

doi = {10.1016/j.scitotenv.2018.02.092},

issn = {00489697},

year  = {2018},

date = {2018-01-01},

journal = {Science of the Total Environment},

volume = {628-629},

pages = {1462-1488},

publisher = {Elsevier B.V.},

abstract = {In this study, a large sample set (276) was separated into up to 15 groups, including coal, fly ash, total particulate matter, coal wastes, river sediments, and different water types. Grouping the sample set into these categories helped to identify the typical features of combustion or water-washing and compare them using newly developed polycyclic aromatic hydrocarbon diagnostic ratios. A wide range of organic pollutants were identified in samples, including aromatic and polycyclic hydrocarbons, nitrogen-heterocycles, sulphur-heterocycles + trithiolane, and polycyclic aromatic hydrocarbons substituted with oxygen functional groups. The distribution of compounds was significantly influenced by water washing or combustion. During the self-heating of coal wastes, secondary compounds such as chlorinated aromatics (chlorobenzene; chloroanthracene; etc.) or light sulphur compounds (e.g. benzenethiol and benzo[b]thiophene) were formed (synthesised). Since these compounds are generally absent in sedimentary organic matter, their origin may be connected with high-temperature formation in burning coal dumps. These compounds should be identified as persistent organic pollutants (POPs) in the environment. The newly defined diagnostic ratios have worked well in separating samples (petrogenic and pyrogenic) and have pointed out the effect of incomplete combustion on self-heated coal waste, ash from domestic furnaces, or water washing and biodegradation of the studied compounds. © 2017 Elsevier B.V.},

note = {36},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-84981747767,

title = {Use of geochemical analysis and vitrinite reflectance to assess different self-heating processes in coal-waste dumps (Upper Silesia, Poland)},

author = { Á. Nádudvari and M.J. Fabiańska},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84981747767&doi=10.1016%2fj.fuel.2016.04.129&partnerID=40&md5=324d0b4794a36a271b29fedd4516315f},

doi = {10.1016/j.fuel.2016.04.129},

issn = {00162361},

year  = {2016},

date = {2016-01-01},

journal = {Fuel},

volume = {181},

pages = {102-119},

publisher = {Elsevier Ltd},

abstract = {Coal-waste dumps are sources of a variety of pollutants, especially when coal-waste material undergoes self-heating. For this research, representative samples were taken from four dumps (Wełnowiec; Czerwionka-Leszczyny; Rymer and Anna) in the Rybnik region. The set of samples collected were divided into three subsets, namely, (1) expelled bitumen precipitated on coal waste, (2) thermally-affected coal waste and (3) highly-thermally affected coal waste from active- and inactive sites. To assess the characteristic features and impacts of self-heating, Rock Eval pyrolysis, measured random vitrinite reflectance (Rr %) and gas chromatography–mass spectrometry (GC–MS) of coal waste extracts were applied. Typical features of the bitumen expelled are elevated parameters of S1, PI, BI, and Py. Generally, the bitumen appeared at lower Tmax values. The self-heating in oxygen deficiency, i.e. under pyrolytic conditions caused thermal cracking of organic matter. Later the generated bitumen expelled from the self-heating zone, migrated and accumulated on colder coal-waste surfaces. This expelled bitumen, observed under fluorescence, shows irregular shapes and coats the organic particles with yellowish–greenish colours. Migrated bitumen is also found in highly-thermally affected, where Tmax values are extremely high due to the oxidation and maturation of organic matter (overmatured). R0 % values based on HI–Tmax comparison and the measured Rr % values generally well correlate in the burning coal waste and in highly-thermally affected samples. The greatest quantities of phenols (mostly C1–C2) occur in the bituminous subset, samples in which 2–3 ring PAHs also dominate. In addition, high relative percentages of phenols (mostly C1–C2) characterize thermally-affected coal waste, together with heavier pyrolytical PAHs; these samples were closer to the heating zone. In totally burned-out porous waste, the presence of adsorbed short-chain n-alkanes and lighter PAHs, and higher CPI, Pr/n-C17 and Pr/Ph values, reflect migration from an active self-heating zone. © 2016 Elsevier Ltd},

note = {19},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-84961327380,

title = {The impact of water-washing, biodegradation and self-heating processes on coal waste dumps in the Rybnik Industrial Region (Poland)},

author = { Á. Nádudvari and M.J. Fabiańska},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84961327380&doi=10.1016%2fj.coal.2016.01.009&partnerID=40&md5=70247ea7c28a7cf2c7659d3b319ff3d6},

doi = {10.1016/j.coal.2016.01.009},

issn = {01665162},

year  = {2016},

date = {2016-01-01},

journal = {International Journal of Coal Geology},

volume = {154-155},

pages = {286-299},

publisher = {Elsevier},

abstract = {Water-washing, biodegradation and self-heating impacts on coal waste features were investigated on four sample sets: fresh coal wastes (sampled less than one week after dumping), samples from gullies in coal-waste dumps, self-heated material and Bierawka river sediment mixed with coal/coal-waste particles. Rock Eval pyrolysis, petrography and gas chromatography-mass spectrometry (GC-MS) were applied to assess degree of organic-matter alteration. It was found that water-washing and self-heating did not influence the vitrinite reflectance. Rock-Eval pyrolysis results better reflected the secondary changes in organic matter, namely, S2-TOC and HI-Tmax allowed their extent to be defined. Changes were noted in other geochemical e.g., n-alkane parameters σ2/σ1 increased and n-C23/n-C31 decreased whereas, Pr/Ph, Pr/n-C17 and Ph/n-C18 ratios increased slightly compared to fresh coal waste. The Hunt diagram allows discrimination between water-washed- and biodegraded samples from unaltered, fresh coal waste. Similarly, changes in distributions of phenols, alkyl aromatic hydrocarbons and polycyclic aromatic hydrocarbons (PAHs) reflect degree of water-washing. Self-heating strongly affects distributions of some biomarkers such as n-alkanes, Pr, and Ph, whereas pentacyclic triterpane distributions were generally well preserved. Phenols occur in greatest amount in self-heated wastes, probably released from heated vitrinite. Domination of 2-3 ring PAH rings indicated the bitumen precipitation zone and well-differentiated burnt-out wastes. Recent organic-matter input is seen in increased CPI (Carbon Preference Index) values. © 2016 Elsevier B.V.},

note = {18},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-84947761154,

title = {Coal-related sources of organic contamination in sediments and water from the Bierawka River (Poland)},

author = { Á. Nádudvari and M.J. Fabiańska},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84947761154&doi=10.1016%2fj.coal.2015.11.006&partnerID=40&md5=25b61effa95af227c0af2a310fe73c8f},

doi = {10.1016/j.coal.2015.11.006},

issn = {01665162},

year  = {2015},

date = {2015-01-01},

journal = {International Journal of Coal Geology},

volume = {152},

pages = {94-109},

publisher = {Elsevier},

abstract = {River sediments mixed with coaly material occur all along the length of the Bierawka River (Poland). To identify the origin of the coal in the sediment, the coaly material was investigated by reflected light microscopy and Rock Eval Pyrolysis, and solvent extracts by gas chromatography-mass spectrometry (GC-MS). Organic compounds dissolved in water were separated by solid phase extraction (SPE) and analyzed by GC-MS. The results point to a kerogen III source. Petrographic analyses confirm abundant coal-, charred- and coked particles in the sediments. Vitrinite reflectance varied between 0.66-0.80 Rr% without any large spatial variation. The coaly particles have different sources. Generally, the primary origin of coal particles is from coal processing and the dumping the ash with unburned coal particles from a glass factory near the river source. Later, this material was redeposited along the entire river course. In addition, hard coal processing (crushing-washing) features are visible in larger coal pieces. A second source of coaly organic matter is a coal waste dump at Szczygłowice where intensive erosion of steep slopes has delivered copious amounts of organic matter into the river. The mixing of this organic matter with that from the glass factory is clearly identified on a ternary diagram. PAH distributions also show differences between sections. The coal particle input from the waste dump increased the relative content of naphthalene relative content downstream. As in the coal waste, 4-5 ring PAHs predominate in the sediments. The pyrogenic origin of PAHs and aromatic compounds such as methylbiphenyls and dibenzofurane in the sediment is indicated by diagnostic PAH ratios; burned particles were identified petrographically. The river water contains only 2-3 ring PAHs, possibly of industrial origin or leached from coal particles in the river sediments. © 2015 Elsevier B.V.},

note = {14},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85014085847,

title = {Distribution of phenols related to self-heating and water washing on coal-waste dumps and in coaly material from the Bierawka river (Poland)},

author = { Á. Nádudvari and M.J. Fabiańska and M. Misz-Kennan},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85014085847&doi=10.1515%2fmipo-2016-0005&partnerID=40&md5=4e2bde5ccd4093b8498a29eb1ee0acac},

doi = {10.1515/mipo-2016-0005},

issn = {18998291},

year  = {2015},

date = {2015-01-01},

journal = {Mineralogia},

volume = {46},

number = {1-2},

pages = {29-40},

publisher = {De Gruyter Open Ltd},

abstract = {Several types of coal waste (freshly-dumped waste; self-heated waste and waste eroded by rain water), river sediments and river water were sampled. The aim was to identify the types of phenols present on the dumps together with their relative abundances. Gas chromatography-mass spectrometry (GC-MS) analyses of a large number of samples (234) statistically underpin the phenol distributions in the sample sets. The largest average relative contents (1.17-13.3%) of phenols occur in the self-heated samples. In these, relatively high amounts of phenol, C1- and C2-phenols reflect the thermal destruction of vitrinite. In fresh coal waste, C2- and C3-phenols that originated from the bacterial/fungal degradation and oxidation of vitrinite particles are the most common (0.6 rel.%). Water-washed coal waste and water samples contain lower quantities of phenols. In the river sediments, the phenols present are the result of bacterial- or fungal decay of coaly organic matter or are of industrial origin. © 2015 Ádám Nádudvari et al., published by De Gruyter Open.},

note = {3},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-84899824272,

title = {Thermal mapping of self-heating zones on coal waste dumps in Upper Silesia (Poland) - A case study},

author = { Á. Nádudvari},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84899824272&doi=10.1016%2fj.coal.2014.04.005&partnerID=40&md5=3a3e44598c6aa20e0c0ad99aee716f08},

doi = {10.1016/j.coal.2014.04.005},

issn = {01665162},

year  = {2014},

date = {2014-01-01},

journal = {International Journal of Coal Geology},

volume = {128-129},

pages = {47-54},

publisher = {Elsevier},

abstract = {The evolution of self-heating areas on five chosen coal-waste dumps in Upper Silesia (Poland) was quantitatively investigated with the aim of finding a cheap and fast method of detecting and localising coal-waste fires on the dumps. The results show that Landsat 4-5 TM and ETM+ images from snow-covered terrain enable the burning areas of the dumps to be seen and that, in addition, they can be used to observe the evolution of these thermal anomalies. Furthermore, the analysis showed that the external temperature had an impact on surfaces of self-heating areas; when the air-temperature was low, the surface temperatures of these hot areas were lowered. In the study, it managed to observe the evolution of self-heating areas, i.e., the appearance of hot spots, their migration and their disappearance were observed. The method used is relatively rapid, low-cost and field temperature measurements are not essential. © 2014 Elsevier B.V.},

note = {23},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-84897995087,

title = {Statistical calculations of the tisza river channel changes along vezseny and martfu (Hungary) from 1873-2010},

author = { Á. Nádudvari and A. Czajka},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84897995087&partnerID=40&md5=1f707c8518a75d421b8d711d2bfe3769},

issn = {18424090},

year  = {2014},

date = {2014-01-01},

journal = {Carpathian Journal of Earth and Environmental Sciences},

volume = {9},

number = {2},

pages = {57-70},

publisher = {North University of Baia Mare},

abstract = {The study presents the channel changes along a 17km length of a Tisza River bend by Martfu. Along the study we were trying to answer the question - what kind of deformations were caused by anthropogenic regulations (such as bank revetments) along the examined river channel in horizontal and vertical aspects in the post-engineering times. Furthermore, the objective was to determine in detail how the river channel regulation works influenced the channel parameters like reach length (LR), Chord length (H), Width (W) and the profile of cross sections. Different aspects of the analyzed river bend were identified. The results show that, the regulation works influenced the geomorphology of the channel, e.g. decrease in average width of the channel, the level of low water levels decreased in the period of 1911-1920 and in 1921-1930 no negative values were recorded after the regulation of the riffle. The cross section areas by the revetments decreased more intensively than the non-stabilized cross section areas. After the stabilization works - by the 1st, 4th, and 6th sections -, the midstream has been growing by the 2nd and 3rd sections between 312-310 km-s. As a result of increased erosion a cutbank has been developing between 311-310 km-s.},

note = {3},

keywords = {},

pubstate = {published},

tppubtype = {article}

}