Study on Chemical Fractionation Distributions and Bioactivity of Heavy Metal Elements in Cropland Soils around Mount Lotus Mine
GAO Fang-lei et al(Guangdong Institute of Engineering Investigation,Guangzhou,Guangdong 510510)
[Objective] The purpose of this research was to study the fractionation distribution and bioactivity of metal elements in cropland soils around mount Lotus mine.[Method]Total contents and five chemical fractions of copper,lead and zinc in two representational cropland deep soils collected from Mount Lotus mine area in eastern Guangdong were analyzed using Tessier sequential extraction procedure.[Result]The results showed that Cu,Pb and Zn were present mainly in the residual fraction,the Fe-Mn oxides-bounds and organic-bounds were in the second place,carbonate-bound fractions were very small,the proportions of exchangeable were the lowest.There were significant differences in fractionation distributions of heavy metals in different soils with different layers.Bioactivity coefficient could be used to evaluate risk assessment of heavy metals.The bioacctivity of Cu,Pb and Zn in soils were low with a sequence of Pb Zn Cu,so it was hardly useful for biology,which did not do serious harm to entironment.[Conclusion] This research has important meanings for entironment bioactivity effect and migration transformation law of heavy metals.
【CateGory Index】： X53