Influence factors analysis of removing heavy metals from multiple metal-contaminated soils with different extractants

来源期刊：中南大学学报(英文版)2009年第1期

论文作者：夏文斌 李欣 高慧 黄宝荣 张慧智 刘云国 曾光明 樊霆

文章页码：108 - 108

Key words：heavy metal; soil remediation; extraction; rhamnolipid

Abstract: Some key factors on the heavy metals removal efficiencies were studied when soil washing technology was used in the remediation of soils contaminated by multiple heavy metals. The results show that the dissolubilities of Cu and Zn are promoted by humic acids, but Pb and Cd are inhibited by humic acids; heavy metals in the clay are more difficult to be extracted than silt; the strong acidic soils can cause the protonation of EDTA and weaken its extracting ability; EDTA is effective for extracting Pb and Cd, while oxalate (OX) is effective for extracting Cu and Zn; and biosurfactant can be used as additive to improve the removal of some particular heavy metals.

基金信息：the Doctoral Foundation of Ministry of Education of China
the National 11th-Five Technology Supporting Project