不同提取剂对蔗田土壤中重金属有效态提取效率的研究

摘要

采用4种提取剂提取广西某受重金属污染的蔗田土壤中有效态Cu、Zn、Pb和Cd。结果表明：各提取剂对土壤有效态Cu、Zn、Pb和Cd的提取量顺序为HNO3＞HOAc＞CaCl2＞NaNO3；土壤重金属Cu、Zn、Pb、Cd任意两个元素的提取率间呈现极显著的相关性。%Four kinds of extractants were chosen to extract the available Cu , Zn, Pb and Cd from the soil of a heavy-metal-polluted sugarcane field in Guangxi .The results showed that the sequence of four extractants according to the extraction contents of a -vailable Cu, Zn, Pb and Cd in the soil was HNO 3>HOAc>CaCl2>NaNO3.There was a very significant correlation between the ex-traction rates of any two elements among Cu , Zn, Pb and Cd.