Mineralogy of the coal waste dumps from the Czech part of the Upper Silesian Basin: Emphasized role of halides for element mobility

Matýsek, Dalibor; Jirásek, Jakub

doi:10.1016/j.coal.2022.104138

Cited by 9 publications

(4 citation statements)

References 66 publications

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“… 23 , 25 Sulfur in low-sulfur coal, as reported by Chou 98 and Dai et al, 99 was derived primarily from parent plant materials, and in most cases, low-sulfur coals formed in nonmarine influenced environments. 98 − 101 Sulfur in such low-sulfur coals has a very little effect on both abundance and modes of occurrence of other elements in coal, 102 − 104 different from that in high-sulfur coals (total sulfur higher than 3%). 105 − 107 Therefore, the impact of sulfur on the modes of occurrence of trace elements in Datanhao and Adaohai coals is not significant.…”

Section: Results and Discussionmentioning

confidence: 98%

Advocating the Use of Bayesian Network in Analyzing the Modes of Occurrence of Elements in Coal

Xu,

Li,

Zhu

et al. 2023

ACS Omega

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Modes of occurrence of elements in coal are important because they can be used not only to understand the origin of inorganic components in coal but also to determine the impact on the environment and human health and the deposition process of coal seams as well. Statistical analysis is one of the commonly used indirect methods used to analyze the modes of occurrence of elements in coal, among which hierarchical clustering is widely used. However, hierarchical clustering may lead to misleading results due to its limitation that it focuses on the clusters of elements rather than a single element. To tackle this issue, we use the first part of a well-known Bayesian network structure learning algorithm, i.e., Peter−Clark (PC) algorithm, to explore the relationships of the coal elemental data and then infer modes of occurrence of elements in coal. A data set containing 95 Late Paleozoic coal samples from the Datanhao and Adaohai mines in Inner Mongolia, China, is used for the performance evaluation. Analytical results show that many instructive and surprising insights can be concluded from the first part of the PC algorithm. Compared with the hierarchical clustering algorithm, the first part of the PC algorithm demonstrates superiority in analyzing the modes of occurrence of elements in coal.

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Section: Results and Discussionmentioning

confidence: 98%

Advocating the Use of Bayesian Network in Analyzing the Modes of Occurrence of Elements in Coal

Xu,

Li,

Zhu

et al. 2023

ACS Omega

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“…Numerous publications have documented a wide range of chemical elements, minerals and other phases precipitating from gases released from uncontrolled coal fires. Publications describing the mineralogy and geochemistry of sublimates and condensates from global coal fires include those of Rost [7], Lapham et al [8], Chessnokov and Shcherbakova [9], Matýsek and Jiráse [10], Zacek and Skaia, [11], Masalehadani et al [12], Skaia et al [13], Ciesielczuk et al [14], and Witzke et al [15]. Additional references can be found in Stracher et al's work [16].…”

Section: Introductionmentioning

confidence: 99%

Coal Fire Sublimates: Are We Missing Something?

Finkelman,

Dodds,

Nichols

et al. 2023

Sustainability

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Uncontrolled coal fires present a nearly unparalleled environmental and human health disaster. These fires can cause the destruction of the ecosystem, ignite forest fires, become a source of windblown dust and siltation of streams, and pollute surface water, ground water, and crops. They can cause significant disruption of families and communities resulting from physical hazards of collapse or explosion, excessive heat, visual blight and loss of potentially valuable acreage, deterioration of cultural infrastructure, personal and public property, and loss of a valuable energy resource. The emission of CO2 and other greenhouse gases presents a significant health hazard due to respiration of dust and aerosols, and exposure to acidic gases, potentially toxic trace elements, and organic compounds. Numerous studies have described many dozens of phases that have condensed from the effluents of these fires. However, many of these studies may have overlooked the nano- and ultra-fine particles that exist beside, in, and under the brightly colored, often spectacular crystalline macro phases. Using a scanning electron microscope with an energy dispersive X-ray detector we examined a small (30 mm × 10 mm) piece of condensate from an uncontrolled coal fire in the Jharia region of India and found more than 30 different phases in this one small piece. The phases included ammonium, copper, iron, lead, bismuth chlorides; bismuth, lead, and ammonium silici-fluorides; ammonium and lead iodates; iron, barium, lead, copper, and zinc sulfides; iron and silicon oxides; and others. Broken fragments revealed multiple generations of phases. Though not strictly nanoparticles (smaller than 0.1 μm), many of these particles are in the micrometer to sub-micron range and it is likely that there are phases present in the nanoparticle size range. Certainly, particulates in the nanoparticle and ultra-fine particle range are being released from the uncontrolled coal fires and may be impacting the environment and the health of the mine workers and nearby residents, an issue that should be investigated.

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“…Sulfatos solúveis na solução em pilhas durante episódios de seca, em locais de intemperismo pirítico intenso, também deram a origem a revestimentos brancos descontínuos e manchas brancas na Tchecoslováquia (Matýsek et al, 2022). A formação de revestimentos de tenardita de até 5 cm de espessura também foi observada durante a extração parcial de uma pilha na Mina Paskov, na Europa Central.…”

Section: Discussionunclassified

“…As crostas de tenardita eram altamente instáveis e se desintegravam. Há relatos da formação de revestimentos de tenardita e gesso por até 20 anos durante os períodos secos (Matýsek et al, 2022). Embora as eflorescências foram macroscopicamente visíveis na superfície da pilha de finos de britagem, a precipitação de cristais no interior da pilha não parece ser tão significativa, tomando a sensibilidade das análises de DRX e FRX.…”

Section: Discussionunclassified

Dinâmica da água e intemperismo em uma pilha de pó de rocha máfica

Rodrigues¹

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Dinâmica de água e intemperismo em uma pilha de pó de rocha máfica/ Beatriz Motta Rodrigues. --versão revisada de acordo com a Resolução CoPGr 6018 de 2011. --Piracicaba, 2023. p.Tese (Doutorado) --USP / Escola Superior de Agricultura "Luiz de Queiroz".1. Finos de britagem 2. Permeabilidade 3. Índices de intemperismo 4. Mineralização de carbono I. Título AGRADECIMENTOS À Deus, pela vida.

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Mineralogy of the coal waste dumps from the Czech part of the Upper Silesian Basin: Emphasized role of halides for element mobility

Cited by 9 publications

References 66 publications

Advocating the Use of Bayesian Network in Analyzing the Modes of Occurrence of Elements in Coal

Advocating the Use of Bayesian Network in Analyzing the Modes of Occurrence of Elements in Coal

Coal Fire Sublimates: Are We Missing Something?

Dinâmica da água e intemperismo em uma pilha de pó de rocha máfica

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