| Speciation and Release Kinetics Simulation of Zn and Cd from River Sediment Contaminated by Gold Mining | |
Cai, Yongbing1,2; Xu, Ning3; Meng, Fande1,2; Li, Feiyue1,2; Xie, Yue1,2; Zhang, Hua4
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| 发表期刊 | WATER AIR AND SOIL POLLUTION
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| ISSN | 0049-6979 |
| 2021-01-07 | |
| 卷号 | 232期号:1页码:11 |
| 关键词 | Kinetic release Zn Cd River sediment Mining |
| DOI | 10.1007/s11270-020-04948-6 |
| 通讯作者 | Xu, Ning(sqnugis@126.com) ; Zhang, Hua(hzhang@yic.ac.cn) |
| 英文摘要 | Heavy metals release from contaminated sediments is one of the most important chemical processes affecting overlying water quality in river, lake, and ocean. The objective of this study was to determine the leaching properties, kinetic rate, and leaching amount of zinc (Zn) and cadmium (Cd) from the river sediment contaminated by gold mining. Speciation of Zn and Cd in the sediments was extracted by a modified BCR extraction procedure. Release kinetics of Zn and Cd were studied by a simulated leaching experiment using a stirred-flow reactor and a two-site equilibrium-kinetic model. The sediments we studied were significantly contaminated by Zn (620-5878 mg kg(-1)) and Cd (2-67 mg kg(-1)), and both have high content of weak acid extractable forms. There were much more smaller particles on the surface of sediment JH01 and JH02 than sediment JH03 and JH04. The two-site equilibrium-kinetic model fits the release data of Zn and Cd well, and it was demonstrated as an effective tool to describe the kinetic release of Zn and Cd from river sediments. Kinetic rates obtained from curve fitting showed large variation among sediments indicating different reaction mechanisms. The rapid release stage (before the second stop-flow) of Zn and Cd was controlled both by the equilibrium sites and the kinetic sites, while the slow release stage (after the second stop-flow) was mainly controlled by the kinetic sites. The total leaching amount of Zn and Cd in JH01 (27.1 mg kg(-1), 0.4 mg kg(-1)), JH02 (474 mg kg(-1), 7.5 mg kg(-1)), JH03 (320 mg kg(-1), 7.6 mg kg(-1)), and JH04 (52.4 mg kg(-1), 2.0 mg kg(-1)) demonstrated that large amount of Zn and Cd in sediments can be leached into solution. Thus, effective measures should be taken to prevent leaching of heavy metals from river sediment. |
| 资助机构 | National Natural Science Foundation of China ; Anhui Provincial Natural Science Foundation, China ; Natural Science Foundation ofAnhui Provincial Department of Education, China |
| 收录类别 | SCI |
| 语种 | 英语 |
| 研究领域[WOS] | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences ; Water Resources |
| WOS记录号 | WOS:000608024800004 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.yic.ac.cn/handle/133337/26158 |
| 专题 | 中国科学院海岸带环境过程与生态修复重点实验室_海岸带环境过程实验室 |
| 通讯作者 | Xu, Ning; Zhang, Hua |
| 作者单位 | 1.Anhui Sci & Technol Univ, Coll Resource & Environm Sci, Fengyang 233100, Peoples R China 2.Anhui Laimujia Biotechnol Co Ltd, Anhui Prov Key Lab Biochar & Cropland Pollut Prev, Bengbu 233000, Peoples R China 3.Shangqiu Normal Univ, Dept Surveying & Planning, Shangqiu 476000, Peoples R China 4.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc & Ecol Remedia, Yantai 264003, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cai, Yongbing,Xu, Ning,Meng, Fande,et al. Speciation and Release Kinetics Simulation of Zn and Cd from River Sediment Contaminated by Gold Mining[J]. WATER AIR AND SOIL POLLUTION,2021,232(1):11. |
| APA | Cai, Yongbing,Xu, Ning,Meng, Fande,Li, Feiyue,Xie, Yue,&Zhang, Hua.(2021).Speciation and Release Kinetics Simulation of Zn and Cd from River Sediment Contaminated by Gold Mining.WATER AIR AND SOIL POLLUTION,232(1),11. |
| MLA | Cai, Yongbing,et al."Speciation and Release Kinetics Simulation of Zn and Cd from River Sediment Contaminated by Gold Mining".WATER AIR AND SOIL POLLUTION 232.1(2021):11. |
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