摘要
分别采集了温州市区风景区、交通干线、住宅区、文教区、工业区土壤样品21个,郊区农田保护区土壤样品2个,测定了各土壤样品的基本理化性质和Cu,Zn,Pb,Cd含量。结果表明:各土样Cu,Zn,Pb的平均含量分别为(34.59±18.29)mg/kg,(169.40±52.97)mg/kg,(65.22±26.86)mg/kg,均超出温州土壤背景值。Cd仅在个别土样中检出,且浓度极低。各形态含量的分析结果表明,Cu,Zn,Pb均以残余态为主,分别为60.17%,50.95%,47.33%。Cu和Pb的酸提取态含量最低,Zn则是有机态含量最低。各形态含量与土壤基本理化性质的相关分析结果表明,Cu,Zn各形态与有机质含量的相关性最大,而Pb则与土壤基本理化性质之间无明显相关关系。
Twenty-one urban soils and two control soils were sampled from the tourist zone,main road zone,residential zone,education zone,industrial zone and suburban agricultural zone in the city of Wenzhou for the study of the pollution situation of heavy metals in urban soils.The basic properties and the contents of Cu,Zn,Pb and Cd were measured for all soil samples.The results showed that the average contents of Cu,Zn and Pb were（34.59±18.29） mg/kg,（169.40±52.97） mg/kg,（65.22±26.86） mg/kg,respectively,all above the background values.The content of Cd were very low and weren＇t detectable for most samples.The results of fractionation showed that for Cu,Zn and Pb,the main fractions were residual and the proportions to total content were 60.17%,50.95%,47.33%,respectively. The smallest fractions were acid extractable for Cu and Pb,and reducible for Zn.The results of correlation analysis between the fractionation and the basic properties showed that organic matters were the main element to affect the content of chemical speciation of Cu,Zn in soils.While for Pb,there wasn＇t a significant correlation relationship between content of fractions and basic properties of soils.
出处
《水土保持学报》
CSCD
北大核心
2007年第6期75-78,134,共5页
Journal of Soil and Water Conservation
基金
国家自然科学基金项目(40501065)
