摘要
选取青岛市不同功能区63个代表性的表层土壤样品,分析了其重金属元素的含量和存在形态.结果表明,青岛城市土壤中Cu、Zn、Pb、Cd均受到不同程度的污染,其中Cd属于重度污染,土壤重金属累积污染程度为Cd>Zn>Cu>Pb.Cu和Zn主要以残渣态为主,Pb主要以残渣态和铁锰氧化态为主,Cd主要以残渣态和有机结合态为主;土壤重金属总量和物理化学性质对各种化学形态重金属含量影响程度明显不同,通过逐步回归方法确定主要影响因子.
The chemical speciation of sixty three soil samples from 5 functional zones of Qingdao was analyzed in this paper.The results showed that Qingdao urban soils were polluted by heavy metals.Cu,Zn,Pb,and Cd.The Cd pollution was most severe and the accumulation level of heavy metal pollution was Cd Zn Cu Pb.The existence of Cu and Zn was mainly in residual fraction form.The Pb content primarily existed in residual fraction and Fe-Mn oxide form.The Cd was mostly in residual fraction and organic forms.The total heavy metal content and physical and chemical properties of soils exerted different effects on chemical speciation of the heavy metals.The main influential factors were determined using a stepwise regression method.
出处
《环境化学》
CAS
CSCD
北大核心
2011年第3期652-657,共6页
Environmental Chemistry
基金
国家自然科学基金资助项目(40601062)
关键词
重金属
含量
形态
逐步回归
heavy metal
concentration
chemical speciation
stepwise regression
