黎塘岩溶区铁锰结核胁迫下土壤重金属元素形态分析  

Speciation Analysis of Heavy Metals in Fe-Mn Nodules Soil in Litang Karst Area

作　　者：苏春田[1] 唐健生[1] 陈宏峰[1] 潘晓东[1] 邹胜章[1] 黄奇波[1] 

机构地区：[1]中国地质科学院岩溶地质研究所,广西桂林541004

出　　处：《中国农学通报》2011年第1期95-99,共5页Chinese Agricultural Science Bulletin

基　　金：广西科学研究与技术开发计划应用基础研究专项(2009DM9033);中国地质科学院岩溶地质研究所所控项目(2009014)

摘　　要：采用连续提取法对黎塘岩溶区铁锰结核胁迫下的土壤重金属元素的形态进行了分析,并用原子吸收分光光度法对重金属元素的含量进行了测定。结果表明,土壤A、B层Cd、Cr、Cu、Pb、Zn以残渣态所占比例最高,Mn以铁锰氧化态所占比例最高;土壤A、B层生物可利用态所占比例以Cd最高,其他元素所占比例甚低。Cd成为本区的主要污染因素,Mn元素的潜在可利用态所占比例最高,Pb元素也相对较高,也应加以注意其影响。The speciation of heavy metals in Fe-Mn nodules soil in Litang karst area was analyzed by using Tessier A sequential extraction method, and the heavy metal contents were detected with atomic absorption spectrophotometry （AAS）. The results showed that in A and B layer soil, the highest proportion was found in Cd, Cr, Cu, Pb and Zn of residual form and Mn of Fe and Mn-oxides bound forms; Cd in bioavilable form possessed the highest proportion in A and B layer soil, while others had very low. Cd was the main pollution in this area. Mn in potential available form had the highest proportion, second to Pb, so attention should be given to its impact.

关 键 词：岩溶区 铁锰结核 土壤 重金属 形态分析 

分 类 号：X131.3[环境科学与工程—环境科学]