Redistribution of Pb, Zn and Cu Fractions in Tailing Soils Treated with Different Extractants

查看全文 作　　者：LIU Yun-[1]Guo;WANG Xian-[1]Hai;ZENG Guang-[1]Ming;LI [1]Xin;ZHOU Chun-[2,3]Hua;FAN [1]Ting;LI Yong-[1]Li;YUAN Xin-[1]Zhong

机构地区：[1]Department of Environmental Science and Engineering, Hunan University, Changsha 410082 (China);[2]Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016 (China);[3]Graduate School of Chinese Academy of Sciences, Beijing 100039 (China)

出　　处：《Pedosphere》索引2006年第16卷第3期,共7页

基　　金：Project supported by the National High Technology Research and Development Program (863 Program) of China(No. 2001AA644020)the Natural Science Foundation of Hunan Province (No. 04JJ3013) 摘　　要：The efficiency of EDTA, HNO3 and CaCl2 as extractants to remove Pb, Zn and Cu from tailing soils without varying soil pH was investigated with distributions of Pb, Zn and Cu being determined before and after extraction using the sequential extraction procedure of the optimized European Community Bureau of Reference (BCR). Results indicated that EDTA and HNO3 were both effective extracting agents.The extractability of extractants for Pb and Zn was in the order EDTA > HNO3 > CaCl2, while for Cu it was HNO3 > EDTA > CaCl2. After EDTA extraction, the proportion of Pb, Zn and Cu in the four fractions varied greatly, which was related to the strong extraction and complexation ability. Before and after extraction with HNO3 and CaCl2, the percentages of Pb, Zn and Cu in the reducible, oxidizable and residual fractions changed little compared to the acid-extractable fraction. The lability of metal in the soil and the kinds of extractants were the factors controlling the effects of metal extraction. 关键词：萃取法重金属土壤污染废料

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Redistribution of Pb, Zn and Cu Fractions in Tailing Soils Treated with Different Extractants

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耦合文献(53)

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