某电子垃圾拆解园周边农田土壤中多环芳烃的污染特征及风险评估  

Pollution characteristics and environment risk assessment of PAHs in agriculture soil around an electronic waste dismantling venues

作　　者：刘劲松[1] 朱国华[1] 尹文华[1,2] 巩宏平[1] 周欣[1] 王玲[1] 李霂菲[3] 陈贝 

机构地区：[1]浙江省环境监测中心,浙江杭州310015 [2]环境保护部华南环境科学研究所,广东广州510665 [3]浙江工业大学化学工程学院,浙江杭州310014

出　　处：《环境污染与防治》2015年第5期1-5,共5页Environmental Pollution & Control

基　　金：浙江省科技厅重大科技专项重点社会发展项目(No.2009C13004)

摘　　要：研究了某电子垃圾拆解园周边151个农田土壤样品中16种多环芳烃（PAHs）的污染特征和环境风险。结果表明,125个表层土壤样品中PAHs总质量浓度在149.0~2.0×104μg/kg,均值为1 805.5μg/kg,随着剖面土壤深度增加,PAHs含量总体呈递减趋势。通过来源解析,电子拆解园周围土壤中PAHs污染主要由废弃的电子电器元件的粗放燃烧和汽车尾气排放共同引起。土壤风险评估表明,7种类二噁英毒性PAHs的毒性当量（TEQPAH）在6.000×10^-5~0.689pg TEQ/g,平均值为0.015pg TEQ/g;苯并（a）芘、二苯并（a,h）蒽、苯并（a）蒽、苯并（b）荧蒽、茚并（1,2,3-cd）芘致癌风险率超出百万分之一的样本比例分别为20.53%、6.62%、1.99%、2.65%、2.65%,其中采样点1、68两个点位表层土壤的苯并（b）荧蒽致癌风险率超过了万分之一。The pollution characteristics and environment risk assessment of 16 polycyclic aromatic hydrocarbons （PAHs） in 151 agriculture soil samples around an electronic waste dismantling venues was studied. Research showed that the total concentrations of 16 PAHs in 125 surface soil samples were 149.0-2.0× 10^4 μg/kg with the average val- ue was 1 805.5μg/kg,and PAHs levels showed a decreasing trend as the increase of profile depth. Source resolution showed that the pollution of PAHs around electronic waste dismantling venues was attributed to the disordered burn- ing of electrical waste and the vehicle exhaust. Base on soil risk assessment, the toxic equivalent concentrations of 7 dioxin-like PAHs （TEQPAH） was calculated as 6.000×10^- 5-0.689 pg TEQ/g,and the mean value was 0.015 pg TEQ/g. The percent- age of benzo（a）pyrene, dibenzo （a, h） anthracene, benzo （a） anthracene, benzo （b） fluoranthene, and indeno （1,2,3-cd） pyrene that exceeding one in a million scale of carcinogenic risk rate were 20.53 %, 6.62%, 1.99 %, 2.65 % and 2.65% respectively. Benzo（b）Sluoranthene in site 1 and site 68 were more serious, the carcinogenic risk rate was above 1/10 000.

关 键 词：多环芳烃 电子垃圾拆解园区 土壤 风险评估 

分 类 号：X53[环境科学与工程—环境工程] X825