Fire hazard in coal waste dumps – selected aspects of the environmental impact

Różański, Zenon

doi:10.1088/1755-1315/174/1/012013

Cited by 7 publications

(5 citation statements)

References 13 publications

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“…In contrast to emissions from other post-mining sources, e.g. abandoned and liquidated ventilation shafts (Wrona et al 2016;, numerous toxic and odoriferous substances in fire gases exist, which are accompanied by a significant odor nuisance in the vicinity of the dumping ground (Różański 2009;Różański and Wrona 2010;Łączny et al 2012;Fabiańska 2013;Stracher et al 2014;Smoliński et al 2016;Surovka et al 2017;Plewa et al 2017;Fabiańska et al 2018).…”

Section: Management Of Mining Waste and The Areas Of Its Storageenvir...mentioning

confidence: 99%

Gospodarka Surowcami Mineralnymi - Mineral Resources Management

Różański¹

2019

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Section: Management Of Mining Waste and The Areas Of Its Storageenvir...mentioning

confidence: 99%

Gospodarka Surowcami Mineralnymi - Mineral Resources Management

Różański¹

2019

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“…Significantly more elements (Al, Co, Cr, Cu, Ni) are leached from the deeply thermally transformed samples (sinters) than from samples of thermally intact (unburnt) waste and slightly thermally transformed (burnt) waste. This is due to the presence of a large amount of glaze in sinter, and this glaze is subject to devitrification and the release of metals contained in it [8]. Changes in temperature also affect the chemical status of organic substances found in the coal waste dump.…”

Section: Introductionmentioning

confidence: 99%

“…The geotechnical condition of the spoil heap or other types of waste or sludge materials that might have been deposited on the spoil heaps in the past must also be taken into consideration. They can represent a secondary source of contamination of the rock environment [8,11,13].…”

Section: Introductionmentioning

confidence: 99%

The Use of Construction Waste to Remediate a Thermally Active Spoil Heap

et al. 2023

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This article presents the results of experimental research on the possible use of construction and demolition waste (CDW) to improve the properties of unburnt tailings originating from the thermally active spoil heap in Heřmanice (Ostrava, Czech Republic). Mining activity anywhere in the world generally entails a lot of negative impacts on the environment, which are of a long-term nature. One of the most pressing challenges in the remediation of the consequences of mining activity is the thermal activity of spoil heaps associated with the high acidity of the tailings. Active acidity (pH/H2O), exchangeable acidity (pH/CaCl2), hydrolytic acidity (Ha), and elemental composition of tailings and CDW have been monitored. Based on an acidity study, it has been proven that compared to burnt tailings (pH/H2O = 8.4, pH/CaCl2 = 8.9 and Ha = 1.4 mmol kg−1), unburnt tailings show acidic properties (pH/H2O = 3.7, pH/CaCl2 = 3.6 and Ha = 205 mmol kg−1). The bioavailability of two selected potentially toxic elements (PTEs), namely Al and Fe, was examined based on the elemental composition. BCR sequential extraction analysis was used to determine their bioavailability. It has been proven that mixing CDW with tailings has a positive effect on the pH value, which has a positive effect on the further development of the entire site. The increase in the pH value is provably dependent on the amount of construction waste added, so it can be said that the increasing amount of construction waste will result in improved parameters of the burnt tailings. The results of the BCR analysis show that aluminum from the tailings will be released both from the reducible and oxidisable fractions, where it will be mainly bound to sulphides. The relatively high concentration of Fe in the oxidisable fraction (2002 mg Fe kg−1) suggests that Fe is bound to sulphides in the tailings, and it is due to the high residual pyrite and sulphide content in the dumped material, as expected. This work has found no limits where CDW no longer positively affects the acidity of unburnt tailings. For practical application, however, it is important that the mixture of CDW and tailings is properly mixed and then used for remediation.

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“…The process of spontaneous combustion of the deposited tailings is mainly influenced by their chemical properties, especially the amount of water, ash, and combustible elements (e.g., pyritic sulphur, hydrogen). The ongoing endogenous combustion is closely related to the emission of gases, the possible resuspension of dust particles, and the presence of hazardous elements that may be present in the tailings material [12][13][14][15]. Another issue closely related to thermally active tailings is their acidification.…”

Section: Introductionmentioning

confidence: 99%