电子垃圾拆解区不同深度土壤重金属污染特征  

Pollution Characteristics of Heavy Metals in Different Depths Soil from Typical E-waste Dismantling Region

作　　者：李科[1] 丁晴晴[1] 蒙丽娜[1] 田媛[1] 

机构地区：[1]北京工商大学环境科学与工程系,北京100048

出　　处：《环境科学与技术》2015年第6期204-209,216,共7页Environmental Science & Technology

基　　金：北京市教委学科建设-重点学科-环境工程资助(PXM2014_014213_000037)

摘　　要：以电子垃圾拆解区浙江台州温岭地区为研究对象,分别选择从事电子垃圾拆解时间较短和较长的A和B拆解点以及未从事电子垃圾拆解的C对照点,采集土壤剖面样品,测定不同深度土壤中重金属Cr、Ni、Cu、Zn、As、Cd、Pb的含量,评价污染状况,分析污染特征及来源。结果表明：重金属在各不同深度土壤中的含量均为电子垃圾拆解点高于对照点,土柱B比土柱A污染严重,在最上层土壤（0~5 cm）已有重金属为中度或重污染。电子垃圾拆解造成了该地区的土壤重金属污染,污染程度与从事拆解时间长短有关,不同深度土壤受污染情况不同。各重金属在土壤中垂直分布特征基本一致,一般为土壤最上层含量最高,含量随土壤深度的增加而减少。The soil section samples are collected from site A, B and C from the typical E-waste dismantling region of Wenling, Taizhou in Zhejiang Province, to determine the concentration, assess the contamination status, explore the pollution characteristics and source of Cr, Ni, Cu, Zn, As, Cd and Pb in different depths soil. Site A, B and C are the areas where the E-waste dismantling has worked for a shorter time, longer time and never, respectively. Results show that the concentration of heavy metals in different depths soil in E-waste dismantling sites are higher than that in control site C, while soil core B is more seriously polluted than soil core A, with some heavy metals in topside （0-5 cm） in moderate or high pollution degree. The source of heavy metals is E-waste dismantling, while the contamination status is associated with the history of E-waste dismantling work, and are distinct in different depths soil. The vertical distributions of heavy metals in soil are basically the same, with the concentrations decreased with the soil depth increased, and the topside as the most contaminative depth.

关 键 词：电子垃圾拆解区 重金属 土壤 不同深度 

分 类 号：X825[环境科学与工程—环境工程]