scholarly journals Study of the effect of weathered coal activated by ultrasonic on speciation of Cr in soil

2020 ◽  
Vol 467 ◽  
pp. 012175
Author(s):  
Miao Liu ◽  
Shi Tang ◽  
Guojing Wang ◽  
Yuxin Xu ◽  
Xue Zhang
Keyword(s):  
Weathered Coal

Effects of weathered coal on coking properties and coke quality

Fuel ◽  
1979 ◽  
Vol 58 (7) ◽  
pp. 542-546 ◽  
Author(s):  
John C. Crelling ◽  
Raymond H. Schrader ◽  
Louis G. Benedict
Keyword(s):  
Coke Quality ◽  
Coking Properties ◽  
Weathered Coal

Environmental evaluation and nano-mineralogical study of fresh and unsaturated weathered coal fly ashes

2019 ◽  
Vol 663 ◽  
pp. 177-188 ◽  
Author(s):  
Segun A. Akinyemi ◽  
Wilson M. Gitari ◽  
Leslie F. Petrik ◽  
Bemgba B. Nyakuma ◽  
James C. Hower ◽  
...  
Keyword(s):  
Fly Ashes ◽  
Environmental Evaluation ◽  
Weathered Coal ◽  
Mineralogical Study ◽  
Coal Fly Ashes

scholarly journals Geochemical Study of Weathered Coal, a Co-Substrate for Bioremediation of South African Coal Discard Dumps

Minerals ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 772 ◽  
Author(s):  
Yvonne van Breugel ◽  
Ashton Keith Cowan ◽  
Harilaos Tsikos
Keyword(s):  
Bound Water ◽  
Hard Coal ◽  
Oxide Content ◽  
Organic Analysis ◽  
Pyrolysis Gas ◽  
Geochemical Study ◽  
Weathered Coal ◽  
Coal Discard ◽  
Grass Growth ◽  
Recalcitrant Waste

Coal mining creates large volumes of waste in the form of discard coal that is stockpiled. In South Africa, rehabilitation of coal discard dumps remains a challenge due to reliance on topsoil for establishment of vegetation. Exploitation of fungal bio liquefaction/degradation of coal resulted in the emergence of Fungcoal as a bioprocess for the rehabilitation of coal discard dumps and opencast spoils. In this process, a suite of fungi is used to bio liquefy/degrade recalcitrant waste coal to form a soil-like material which promotes reinvigoration of the microbial component, grass growth, and re-vegetation. Here, the role of outcrop weathered coal as a mineral/carbon source to ensure biologically induced humic acid-like substance enrichment of discard and spoil to increase efficacy of fungi-plant mutualism and stimulate revegetation without the need for topsoil was investigated. Mineralogical, elemental, and pyrolysis gas chromatography-mass spectroscopic analyses show that outcrop weathered coal has decreased volatile material and increased humics, ash, and mineral bound water in comparison to bituminous coal. These changes occur coincidently with decreased C, N, and H contents, and a substantial increase in O concentration. No apparent stoichiometric relationship between sulphur and iron oxide content of weathered coal could be discerned suggesting little residual pyrite in this material and a dominance of oxy-hydroxides of Fe. Organic analysis showed weathered coal to be enriched in C-16 and C-18 fatty acids and the presence of the indicator, 17α(H),21β(H)-homohopane but not the β,β-stereoisomer, was interpreted to indicate that bacteria may only have been active prior to transformation of hard coal into weathered coal.

Feasibility analysis of the in situ conversion of biomethane in surface weathered coal

Fuel ◽  
2020 ◽  
Vol 268 ◽  
pp. 117273
Author(s):  
Hongyu Guo ◽  
Yunsong Li ◽  
Qian Wang ◽  
Weizhong Zhao ◽  
Jianbo Jia ◽  
...  
Keyword(s):  
Feasibility Analysis ◽  
Weathered Coal

Phosphate-solubilizing bacteria will not significantly remobilize soil cadmium remediated by weathered coal

2019 ◽  
Vol 26 (28) ◽  
pp. 29003-29011
Author(s):  
Qiong Gao ◽  
Qu-Sheng Li ◽  
Bao-Yan He ◽  
Jun-Qing Yang ◽  
Li-Li Wang ◽  
...  
Keyword(s):  
Phosphate Solubilizing Bacteria ◽  
Weathered Coal ◽  
Soil Cadmium ◽  
Phosphate Solubilizing

scholarly journals A study of weathered coal spectroscopic properties

2017 ◽  
Vol 128 ◽  
pp. 51-58 ◽  
Author(s):  
Janis Krumins ◽  
Zhiping Yang ◽  
Qiang Zhang ◽  
Min Yan ◽  
Maris Klavins
Keyword(s):  
Spectroscopic Properties ◽  
Weathered Coal
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