摘要
对南昌市青山污泥和纸厂污泥Hg,Ni,Cd,Cr,Zn,As,Cu,Pb的形态分布及其生物活性和迁移性进行了调查研究。结果表明,运用Tessier连续提取法,污泥中Hg,Ni,Cd,Cr,Zn,As,Cu,Pb的各形态含量之和与其总量非常接近,对Pb提取率为92.5%～94.6%,对Cr为90.1%～90.3%,表明该形态分析方法的结果是合理的。2种城市污泥中Ni,Cu,Zn,As,Cd,Pb,Cr,Hg的形态分布有很大的差别,且这些重金属的不同形态也存在较大的差异。青山污泥重金属生物活性系数的大小顺序是:Hg>Ni>As>Cd>Cu>Cr>Zn>Pb;迁移能力的顺序为:Hg>Ni>Cd>Cr>Zn>As>Cu>Pb。纸厂污泥重金属生物活性系数的大小顺序是:Cr>Hg>Cu>Cd>Ni>Zn>As>Pb,迁移能力的顺序是:Cr>Hg>Cd>Ni>Zn>Cu>As≈Pb。研究结果将在污泥的农业利用中为污泥中重金属危害的评估提供科学依据。
The fraction distributions,availabilities,and mobility of Hg,Ni,Cd,Cr,Zn,As,Cu,and Pb in municipal sludge of Nanchang City were investigated.Results showed that the extraction percentages of Pb and Cr by Tessier＇s sequential extraction procedures were 96.5%～94.6% and 90.1%～90.3%,respectively.The sums of each fraction of heavy metals were in agreement with the total contents of heavy metals,which means that the fraction distributions of heavy metals in the municipal sludge given by Tessier＇s method were reasonable.There were significant differences in fraction distributions of heavy metals in the two kinds of municipal sludge（QCSS and ZCSS）and among the different fractions of the heavy metals.By the availabilities of heavy metals,the heavy metals in QCSS were in the order of HgNiAsCdCuCrZnPb and by the mobility of heavy metals,HgNiCdCrZnAsCuPb,respectively.In ZCSS,the corresponding orders were CrHgCuCdNiZnAsPb and CrHgCdNiZnCuAs≈Pb,respectively.The result may provide a scientific basis for the harmful assessment of heavy metals in the agricultural utilization of sewage sludge.
出处
《水土保持通报》
CSCD
北大核心
2010年第5期63-67,共5页
Bulletin of Soil and Water Conservation
基金
国家自然基金"基于LUCC的区域城市群物质代谢时空动态变化研究:以环鄱阳湖城市群为例"(40961041)
江西财经大学青年校级课题"南昌市城市污泥重金属污染分析评价及植物修复研究"(2008年度)
关键词
污泥
重金属
TESSIER连续提取法
sewage sludge
heavy metal
Tessier＇s sequential extraction procedure
