厦门西海域表层沉积物中重金属的赋存形态  

Speciations of Heavy Metals in the Surface Sediments from Xiamen Western Harbor

作　　者：杨春霖[1] 欧阳通[1] 张珞平[1] 景有海[1] 叶歆[1] 余新田[2] 梁榕源[2] 

机构地区：[1]厦门大学环境科学研究中心,福建厦门361005 [2]厦门市环境监测中心站,福建厦门361004

出　　处：《厦门大学学报（自然科学版）》2007年第A01期89-93,共5页Journal of Xiamen University：Natural Science

基　　金：福建省科技攻关课题(2004I001)资助

摘　　要：采用逐级浸出法对厦门西海域6个表层沉积物样品中重金属(Cd、Cr、Cu、Ni、Pb、Zn)的赋存形态进行分析.结果表明:该海域表层沉积物中各重金属元素主要来源于人为输入的各种活性形态,自然输入的残渣态(RES)所占比例较低(10%～20%),在环境条件变化时具有向水相迁移和为水生物所利用的潜在风险性;其中Cu、Cr和Ni的赋存形态以铁锰氧化态(ERO和MRO)和有机物及硫化物结合态(OSM)为主,Pb和Cd则以碳酸盐态(CARB)、铁锰氧化态和有机物及硫化物结合态为主,Zn的各形态所占比例相对比较平均.此次研究对该海域表层沉积物中重金属的赋存形态特征有了基本了解,有助于进一步研究金属元素在近海环境中的迁移和形态转化机制.A sequential extraction procedure was employed to study the chemical speciations of heavy metals in 6 selected surface sediments from Xiamen Western Harbor. The results indicated that Cd,Cr,Cu, Ni, Pb, and Zn in the sediments were predominated （80%-90%） by the geochemically extractable forms,which mainly originated from anthropogenic sources,and least present in residual form （RES）. The dominant proportion of Cu,Cr and Ni was ERO （easily reducible oxides）, MRO （moderately reducible oxides） and OSM （organic/sulfide matter）,and that of Pb and Cd was CARB （carbonate）,ERO,MRO and OSM,whereas Zn was evenly distributed. The results of the present study help to provide a deeper understanding to the distribution pattern of such heavy metals and to undertake further research concerning transition mechanisms of pollutants in marine environment.

关 键 词：厦门西海域 表层沉积物 重金属 逐级浸出法 赋存形态 

分 类 号：P743[天文地球—海洋科学]