IEECAS OpenIR  > 黄土与第四纪地质国家重点实验室(2010~)
Leaching characteristic and environmental implication of rejectionrocks from Huainan Coalfield, Anhui Province, China
Zhou,CC(Zhou,Chongcai)[1,2]; Liu,GJ(Liu,Guijian)[1,2]; Fang,T(Fang,Ting)[1]; Sun,RY(Sun,Ruoyu)[1]; Wu,D(Wu,Dun)[1]
2014
Source PublicationJournal of Geochemical Exploration
Volume143Pages:54-61
Subtype期刊论文
Abstract

Rejection rocks including intra-seam parting, boundary roof and floor intimately associated with coal seams, are commonly produced along with bulk coal. In general, these non-combustible rocks are rejected during coal processing activities, accumulated on the surface, and subjected to natural weathering and leaching. The degree that the rejection rocks threaten the surrounding ecosystems is determined by total concentrations, modes of occurrence of hazardous elements and minerals therein. Three hundred and ninety-four samples of coal seam parting (30), roof (182) and floor (182) in the Huainan coalfield were collected to investigate the geochemical characteristics and environmental risks of rejection rocks. The morphological analysis revealed that rejection rocks are composed of lithic fragments with organic and inorganic layering, clay minerals, quartz, pyrite and chlorite. Correlation analysis between elements and ash yield suggested that most of the environmentally sensitive elements (As, Cd, Co, Cr, Cu, Mn, Ni, Pb, Se, Sn V and Zn) are associated with inorganic matter, but boron is mainly associated with organic matter. In-house sequential leaching experiments conducted on selected rejection rocks showed that the rejection rocks from Huainan Coalfield could be suitable for landfill under high regularization and management. However, in the currently unconfined deposits, trace elements (such as Cu, Ni, Pb, Sb, Sn and Zn possibly) may pose a medium risk to the ecosystem.

KeywordHuainan Coalfield Rejection Rocks Leaching Behavior Environmental Characterization
DOI10.1016/j.gexplo.2014.03.010
Indexed BySCI
Language英语
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/9872
Collection黄土与第四纪地质国家重点实验室(2010~)
Corresponding AuthorLiu,GJ(Liu,Guijian)[1,2]
Affiliation1.CAS Key Laboratory of Crust–Mantle Materials and Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China;
2.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, The Chinese Academy of Sciences, Xi'an, Shaanxi 710075, China
Recommended Citation
GB/T 7714
Zhou,CC,Liu,GJ,Fang,T,et al. Leaching characteristic and environmental implication of rejectionrocks from Huainan Coalfield, Anhui Province, China[J]. Journal of Geochemical Exploration,2014,143:54-61.
APA Zhou,CC,Liu,GJ,Fang,T,Sun,RY,&Wu,D.(2014).Leaching characteristic and environmental implication of rejectionrocks from Huainan Coalfield, Anhui Province, China.Journal of Geochemical Exploration,143,54-61.
MLA Zhou,CC,et al."Leaching characteristic and environmental implication of rejectionrocks from Huainan Coalfield, Anhui Province, China".Journal of Geochemical Exploration 143(2014):54-61.
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