铜陵矿区土壤中铅的存在形态及生物有效性  

Speciation and bioavailability of lead in Tongling mining soil

作　　者：周涛发[1] 殷汉琴[1] 张鑫[1] 肖正辉[1] 袁峰[1] 

机构地区：[1]合肥工业大学资源与环境工程学院,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2005年第9期1146-1150,共5页Journal of Hefei University of Technology：Natural Science

基　　金：安徽省自然科学基金资助项目(01045202);安徽省优秀青年科技基金资助项目(04045063)

摘　　要：采取Tessier连续提取法,研究了铜陵矿区表层土壤中铅的化学形态分布.结果表明:土壤中铅的质量比多数高于地区背景值,土壤铅污染指数Pi为0.09～8.81.铅存在形态分布规律是残渣态所占比例最高,其次是Fe-Mn氧化态、有机态和可交换态,碳酸盐态所占的比例最小.土壤中生物可利用态铅的质量比较高,占总量的3.1%～60.4%,特别是采矿场附近铅超标严重,应以种植非食用经济作物为主.According to sequential extraction procedures of Tessier et al, the chemical speciation of lead in different kinds of soil in the Tongling mining area is studied in this paper. The results indicate that the soil was polluted by the lead from the copper mine and smelter, and the lead pollution index is between 0.09 and 8.81. The speciation of lead in soil is dominated by the minerals species,which is followed sequentially by the Fe-Mn oxides species,the organic matter species, exchangeable species and the carbonates species. The bioavailable lead is high in mass ratio and occupies 3.1-60.4% of the whole, and especially in the vicinity of mining stopes,the soil is heavily contaminated by lead. The contaminated soil is fit for economic inedible crops.

关 键 词：土壤 铅 形态 生物有效性 铜陵市 

分 类 号：P595[天文地球—地球化学] X142[天文地球—地质学]