样品陈化对自然水体采集生物膜中重金属形态分布的影响  

Effects of Sample Aging on Distribution of Heavy Metals in Natural Surface Coatings Collected from Natural Waters

作　　者：王婷[1] 王晓丽[2] 杜显元[2] 刘建林[1] 陈界江[2] 李鱼[1] 

机构地区：[1]华北电力大学能源与环境研究中心,北京102206 [2]吉林大学环境与资源学院,长春130012

出　　处：《吉林大学学报（理学版）》2008年第5期1001-1005,共5页Journal of Jilin University:Science Edition

基　　金：国家"973"计划项目基金(批准号:2004CB3418501);华北电力大学引进高层人才科研启动基金

摘　　要：以松花江采集的生物膜为研究对象，采用改进的Tessier连续萃取方法分析生物膜样品陈化3个月后金属形态分布规律的变化。结果表明，样品陈化使Mn从碳酸盐结合态和铁／锰氧化物结合态向可交换态和残渣态转化，幅度为11.17％-26.27％；样品陈化后Fe从有机结合态和残渣态向铁／锰氧化物结合态转化16.89％-24.97％；原来占总量54.45％-59.56％的有机结合态Cu在样品陈化后均转化为铁／锰氧化物结合态和残渣态；而可交换态和有机结合态的Zn在样品陈化后全部转化为其他形态。其中部分向碳酸盐结合态转化。Distribution of heavy metals in the natural surface coatings collected from the Songhua River was studied before and after their aging for 3 months. It was indicated that sample aging resulted in 11.17% - 26.27% manganese to turn from carbonate-associated and Fe/Mn-oxides phases to exchangeable and residual phases. After sample aging, some iron associated with organic matters and residues （ 16.89% - 24.97% of iron） transferred to Fe/Mn-oxides phases. All copper associated with organic matters transferred to Fe/Mnoxides and residual phases after aging. Exchangeable and organic matters-associated zinc transferred to other phases completely because of aging.

关 键 词：表层沉积物 生物膜 样品陈化 重金属形态 生物可利用性 

分 类 号：X132[环境科学与工程—环境科学]