淋洗剂在重金属污染土壤修复中的研究进展

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Abstract The research progresses of leaching agents in the remediation of heavy metal contaminated soils were reviewed with focused on three different pollution types, including the soils mainly contaminated by cadmium (Cd) and lead (Pb) of the same category, by arsenic (As), and by the combination of the first two types of heavy metals. In general, the chelating agent for the first type of polluted soil showed higher removal efficiency, especially for GLDA (Glutamic acid, N, N-Diacetic acid), citric acid and so on, which were environment friendly either. For the second type of soil mainly contaminated by As, the removal rate of composite washing agent (CWA) was relatively high like NaOH-EDTA (NaOH-Ethylenediamine tetraacetic acid). In particular, the CWAs, just like NaOH-H₃PO₄, was with very high removal rates compared to the single washing agents for the third type polluted soil. It was suggested that the CWAs with higher removal efficiency for several heavy metals in soil together and less secondary pollution will be the key research points in the future.

Key words： soil washing washing agents heavy metal arsenic

Received: 25 April 2021

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X53

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	XU Lei
	DAI Hui-ping
	WEI Shu-he

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XU Lei,DAI Hui-ping,WEI Shu-he. Advances of washing agents in remediation of heavy metal contaminated soil[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(11): 5237-5244.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I11/5237

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