Evaluation of arsenic mineralogy and geochemistry in gold mine-impacted matrices: Speciation, transformation, and potential associated risks
文献类型：期刊论文
| 作者 | Wen, Qiqian1,2; Yang, Xiao1; Yan, Xiulan1; Yang, Linsheng1 |
| 刊名 | JOURNAL OF ENVIRONMENTAL MANAGEMENT
 |
| 出版日期 | 2022-04-15 |
| 卷号 | 308页码:9 |
| 关键词 | Arsenic Mineralogy Geochemical stability Mine-impacted wastes Health risk assessment |
| ISSN号 | 0301-4797 |
| DOI | 10.1016/j.jenvman.2022.114619 |
| 通讯作者 | Yan, Xiulan(yanxl@igsnrr.ac.cn) ; Yang, Linsheng(yangls@igsnrr.ac.cn) |
| 英文摘要 | The risk of arsenic (As) contamination from gold mining is a long-term environmental concern for mines worldwide. Researchers have mainly focused on As contamination induced by tailings, however, less attention has been paid mineralogically to differentiate the fate of As among different As-bearing matrices. This paper presents a detailed study of the mineralogical and morphological features of three typical As-bearing matrices (waste rock, ores, and tailings) using bulk chemical, microscopic and spectroscopic analyses, and reveals the geochemical behavior of As in those matrices. Results from mineral composition identified by RoqSCAN revealed that the matrices were dominated by quartz, k-feldspar, albite, muscovite, and clay minerals, with subordinate ankerite, chlorite, smectite, hematite, arsenopyrite, pyrrhotite, apatite, pyrite, halite, and calcite. The sequential extraction scheme indicated that As in waste rock, ores and tailings was mainly hosted in arsenopyrite. Microscopic analysis observed that waste rock was significantly different from the ores and tailings in terms of mineralogical and morphological characteristics. For waste rock, from arsenopyrite to hematite, As content decreased from 46.12 wt% to 3.54 wt%. However, arsenopyrite presented as unweathered euhedral crystals or slight fragmentation in ores and tailings and a narrower oxidation rims than that of waste rock. The leaching test of SPLP showed that the highest As leaching was found in waste rock (0.246 mg/L) which was significantly higher than those in ores (0.080 mg/L) and tailings (0.148 mg/L). The As in waste rock displayed weaker geochemical stability than in ores and tailings, as supported by mineralogy analysis. Health risk assessment suggested waste rock had a higher health risk for both adults and children compared with ores and tailings. These findings reaffirm that understanding of As fate among different source materials is paramount for securing humans from As hazards. More must be done to decelerate the continuous oxidation of waste rock, thus mitigating As release into nature. |
| WOS关键词 | WASTE ; MOBILITY ; BIOACCESSIBILITY ; DEPOSITS ; SOILS |
| 资助项目 | National Natural Science Foundation of China[41571309] ; National Natural Science Foundation of China[U21A2023] ; National Key Research and Development Program of China[2017YFD0800900] ; College of Earth Sciences and Resource, China University of Geo-sciences |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000784244900003 |
| 出版者 | ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD |
| 资助机构 | National Natural Science Foundation of China ; National Key Research and Development Program of China ; College of Earth Sciences and Resource, China University of Geo-sciences |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/175102]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Yan, Xiulan; Yang, Linsheng |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wen, Qiqian,Yang, Xiao,Yan, Xiulan,et al. Evaluation of arsenic mineralogy and geochemistry in gold mine-impacted matrices: Speciation, transformation, and potential associated risks[J]. JOURNAL OF ENVIRONMENTAL MANAGEMENT,2022,308:9. |
| APA | Wen, Qiqian,Yang, Xiao,Yan, Xiulan,&Yang, Linsheng.(2022).Evaluation of arsenic mineralogy and geochemistry in gold mine-impacted matrices: Speciation, transformation, and potential associated risks.JOURNAL OF ENVIRONMENTAL MANAGEMENT,308,9. |
| MLA | Wen, Qiqian,et al."Evaluation of arsenic mineralogy and geochemistry in gold mine-impacted matrices: Speciation, transformation, and potential associated risks".JOURNAL OF ENVIRONMENTAL MANAGEMENT 308(2022):9. |
入库方式： OAI收割
来源：地理科学与资源研究所
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