厦门西海域沉积物中重金属的赋存状态及潜在迁移性  

Occurrence states and potential mobility of heavy metals in sediments of Western Xiamen Bay

作　　者：姚藩照[1] 张宇峰[1] 胡忻[2,3] 柳欣[4] 

机构地区：[1]南京工业大学环境学院,江苏南京210009 [2]南京大学生命分析化学教育部重点实验室现代分析中心,江苏南京210093 [3]厦门大学近海海洋环境科学国家重点实验室,海洋与环境学院,福建厦门361005 [4]厦门大学近海海洋环境科学国家重点实验室海洋与环境学院,福建厦门361005

出　　处：《台湾海峡》2010年第4期532-538,共7页Journal of Oceanography In Taiwan Strait

基　　金：厦门大学近海海洋环境科学国家重点实验室开放基金资助项目(MEL0705);国家自然科学基金资助项目(20607010)

摘　　要：以厦门西海域沉积物为研究对象,利用改良BCR连续提取法分析了沉积物样品中Zn、Mn、Cr、Cu、Cd和Pb的赋存状态,并通过潜在迁移指数(PMI)探讨了沉积物中重金属的潜在迁移风险.结果表明:6种重金属总量在厦门西海域沉积物中由大到小的顺序为:Mn>Zn>Cr>Pb>Cu>Cd,其中Mn和Zn的含量达到了1 471 mg/kg和231 mg/kg.与沉积物质量标准对比,沉积物样品中Zn、Cr、Cu和Pb的含量较高.改良BCR连续提取表明6种金属中Zn、Cr和Cu主要以残渣态存在,Mn和Cd主要以酸溶态存在,Pb则以可还原态为主.厦门西海域沉积物中6种重金属的潜在迁移指数大到小的顺序为:Mn>Cd>Zn>Cu>Pb>Cr,其中Mn和Cd的潜在迁移危险最大.The occurrence states of heavy metals（Zn,Mn,Cr,Cu,Cd and Pb） in the surface sediments of Western Xiamen Bay and Jiulong River Estuary were evaluated by the modified BCR（European Communities Bureau of Reference） sequential extraction procedure.The potential mobile characteristics of heavy metals were also analyzed using the potential migration index（PMI）.The results showed that the total contents of heavy metals were MnZnCrPbCuCd,with Mn concentration（1 471 mg/kg） and Zn concentration（231 mg/kg） being higher than the others.When compared with the sediment quality standards,the contents of Zn,Cr,Cu and Pb in Western Xiamen Bay were higher than those of Cd.The continuous application of the modified BCR procedure indicated that Zn,Cr and Cu existed as residual fractions.Specifically,Mn and Cd primarily existed in the acid soluble fraction,while Pb prevailed in the reducible fractions.The PMI of the six heavy metals indicated that the potential risk of migration in the Western Xiamen Bay sediments was MnCdZnCuPbCr.

关 键 词：海洋化学 厦门西海域 沉积物 重金属 赋存状态 迁移 

分 类 号：P734[天文地球—海洋化学]