摘要
本文以重庆市某废弃铅锌矿区土壤作为研究对象,采用BCR连续提取法,提取并测定了矿区土壤中的Cu、Zn、Pb、Cd和As五种重金属元素不同化学形态含量。结果表明,研究区土壤受到了明显的重金属污染,土壤重金属元素的各化学形态组成存在明显差异,其中As和Cu以残渣态为主,其活化程度相对较低;Pb以残渣态和可还原态为主;而Cd和Zn元素4种化学形态均有,其中土壤中Cd较为活跃。不同重金属元素化学形态组成特征差异较大,因此须根据化学形态特征因地制宜地提出针对性的修复治理措施。
The total amounts of heavy metals and their different chemical forms in soil can directly reflect their toxicity,mobility and bioavailability.In this study,five heavy metal elements,Cu,Zn,Pb,Cd and As,in an abandoned leadzinc mining area of Chongqing were extracted by the BCR continuous extraction method and their chemical extraction characteristics were determined.The results showed that the soil in the study area had been contaminated by heavy metals.The chemical compositions of heavy metal elements in soils from the study area are significant different,arsenic and copper are mainly in the residual state with low activation degrees,lead is mainly in the residual state and the reducible state,cadmium and zinc are found in all four chemical forms,and cadmium in soil shows a relatively higher activity.The characteristics of different heavy metals in different chemical compositions are quite different.Therefore,it is necessary to propose a specific treatment method according to characteristics of different heavy metals and their chemical species.
作者
秦勇军
朱小龙
苏晴
吕文强
王兵
QIN Yong-jun;ZHU Xiao-long;SU Qing;LV Wen-qiang;WANG Bing(Appraisal Center for Ecology and Environment Engineering of Chongqing,Chongqing 401121,China;State Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550081,China;Management and Service Center for Solid Waste of Chongqing,Chongqing 401121,China;Institute of Guizhou Mountain Resources,Guizhou Academy of Sciences,Guiyang 550001,China)
出处
《矿物岩石地球化学通报》
CAS
CSCD
北大核心
2019年第6期1218-1223,共6页
Bulletin of Mineralogy, Petrology and Geochemistry
基金
重庆市科技计划项目(cstc2018jszx-cyzdX0019)。
关键词
土壤
重金属
形态
修复治理
soil
heavy metals
speciation
remediation
