| Changes in metal mobility assessed by EDTA kinetic extraction in three polluted soils after repeated phytoremediation using a cadmium/zinc hyperaccumulator | |
Li, Zhu; Wu, Longhua; Luo, Yongming ; Christie, Peter
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| 发表期刊 | CHEMOSPHERE
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| ISSN | 0045-6535 |
| 2018-03 | |
| 卷号 | 194页码:432-440 |
| 关键词 | Soil metals Phytoremediation The two first-order reactions model Kinetic extraction Environmental risk |
| 研究领域 | Environmental Sciences |
| DOI | 10.1016/j.chemosphere.2017.12.005 |
| 产权排序 | [Li, Zhu; Wu, Longhua; Luo, Yongming; Christie, Peter] Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Jiangsu, Peoples R China; [Luo, Yongming] Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc, Yantai 264003, Peoples R China |
| 作者部门 | 海岸带环境过程实验室 |
| 英文摘要 | Phytoextraction is one of the most promising technologies for the decontamination of metal-polluted agricultural soils. Effects of repeated phytoextraction by the cadmium (Cd)/zinc (Zn) hyperaccumulator Sedum plumbizincicola on metal (Cd, Zn, copper (Cu) and lead (Pb)) mobility were investigated in three contaminated soils with contrasting properties. EDTA kinetic extraction and the two first-order reactions model showed advantages in the assessment of soil metal mobility and clearly discriminated changes in metal fractions induced by phytoextraction. Repeated phytoextraction led to large decreases in readily labile (Q(1)(0)) and less labile (Q(2)(0)) fractions of Cd and Zn in all three soils with the sole exception of an increase in the Q(2)(0) of Zn in the highly polluted soil. However, Q(1)(0) fractions of soil Cu and Pb showed apparent increases with the sole exception of Pb in the acid polluted soil but showed a higher desorption rate constant (k(1)). Furthermore, S. plumbizincicola decreased the non-labile fraction (Q(3)(0)) of all metals tested, indicating that the hyperaccumulator can redistribute soil metals from non-labile to labile fractions. This suggests that phytoextraction decreased the mobility of the metals hyperaccumulated by the plant (Cd and Zn) but increased the mobility of the metals not hyperaccumulated (Cu and Pb). Thus, phytoextraction of soils contaminated with mixtures of metals must be performed carefully because of potential increases in the mobility of non-hyperaccumulated metals in the soil and the consequent environmental risks. (C) 2017 Elsevier Ltd. All rights reserved. |
| 文章类型 | Article |
| 资助机构 | National Natural Science Foundation of China [41325003, 41501348] |
| 收录类别 | SCI |
| 语种 | 英语 |
| 关键词[WOS] | HEAVY-METALS ; RHIZOSPHERE CHARACTERISTICS ; POLYCHLORINATED-BIPHENYLS ; REPEATED PHYTOEXTRACTION ; NICKEL HYPERACCUMULATOR ; SEDUM-PLUMBIZINCICOLA ; RISK-ASSESSMENT ; ORGANIC-MATTER ; CHINA ; MOBILIZATION |
| 研究领域[WOS] | Environmental Sciences & Ecology |
| WOS记录号 | WOS:000423890700047 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.yic.ac.cn/handle/133337/24391 |
| 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 中国科学院海岸带环境过程与生态修复重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Jiangsu, Peoples R China; 2.Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc, Yantai 264003, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Zhu,Wu, Longhua,Luo, Yongming,et al. Changes in metal mobility assessed by EDTA kinetic extraction in three polluted soils after repeated phytoremediation using a cadmium/zinc hyperaccumulator[J]. CHEMOSPHERE,2018,194:432-440. |
| APA | Li, Zhu,Wu, Longhua,Luo, Yongming,&Christie, Peter.(2018).Changes in metal mobility assessed by EDTA kinetic extraction in three polluted soils after repeated phytoremediation using a cadmium/zinc hyperaccumulator.CHEMOSPHERE,194,432-440. |
| MLA | Li, Zhu,et al."Changes in metal mobility assessed by EDTA kinetic extraction in three polluted soils after repeated phytoremediation using a cadmium/zinc hyperaccumulator".CHEMOSPHERE 194(2018):432-440. |
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