东北地区污染黑土中重金属与有机质的关联作用  

Study on the Association between Heavy Metals and Organic Matter in Polluted Black Soil in Northeast China

作　　者：曹会聪[1] 王金达[1] 张学林[1] 

机构地区：[1]中国科学院东北地理与农业生态研究所

出　　处：《环境科学研究》2007年第1期36-41,共6页Research of Environmental Sciences

基　　金：国家重点基础研究发展计划(973)项目(2004CB41850407);中国科学院知识创新工程重大项目(KZCX1-SW-19-4-01)

摘　　要：通过对东北地区污染农田黑土剖面的取样调查,对重金属Cd,Pb,Cu,Zn在农田黑土中不同采样点的全量、有效态和有机质结合态的分布特征及其与有机质的关系进行了研究,并分析了土壤有机质对重金属有机质结合态的影响.结果表明,Pb以有机质结合态存在的量较大,能与有机质形成较多的络合物,而Zn的有机质结合态占全量的比例相对较小,Cd和Cu有机质结合态占全量的比例处于Pb和Zn之间.由于外源污染的影响,土壤有机质含量与重金属有机质结合态相关性并不显著.由于土壤样品的不同解离功能团结合重金属的能力不同,采样区的重金属有机质结合态未表现出明显的分布规律.Samples from the polluted black soil profiles in Northeast China were collected to investigate the distribution characteristics of total contents, available contents and organically-bound contents of cadmium （Cd）, lead （Pb）, copper （Cu） and zinc （Zn） at different depths, as well as their relation to soil organic matter. The impact of soil organic matter on organically-bound heavy metals was also analyzed. It is shown that, among the four heavy metals, the amount of Pb in organic form analyzed was greatest and that of Zn was the lowest. Under the influence of human activities, there was no obvious correlation between soil organic matter content and organically-bound contents of four elements. Due to different capacity of dissociation groups in the soils, there was no obvious distribution characteristic of organically-bound heavy metals in the sampling area.

关 键 词：污染农田黑土 CD PB Cu ZN 有机质结合态 有机质 

分 类 号：X53[环境科学与工程—环境工程]