土壤学报2011，Vol.48Issue(4)：731-742,12.
典型地区多介质环境中多氯联苯、镉致癌风险评估
CARCINOGENIC RISK ASSESSMENT OF POLYCHLORINATED BIPHENYLS AND CADMIUM IN MULTI-MEDIA OF A TYPICAL AREA
摘要
Abstract
Samples of a variety of environmental media, such as soil ( n = 151 ) , groundwater ( n = 9 ) , air ( Inhal-able participate (PM10) and gaseous PCBs, n =4) , vegetable (n =38) and rice (n =95) were collected in a typical area for analysis of concentrations of PCBs and Cd. The carcinogenic exposure dose and risk of PCBs and Cd to people living in that environment and being exposed to the multi-media through multi-pathway were assessed, using the carcinogenic risk assessment model of USEPA. Contribution rate of the pollutants to the carcinogenic risk was analyzed. And main carcinogenic contaminants, exposure pathways and the greatest contributor among the environmental media to the carcinogenic risk were screened out. Results show that all the investigated media were heavily polluted by PCBs and Cd. The concentration of Cd in the vegetable and rice reached 130 and 17 times the threshold value for the pollutants in the food of China, respectively. Both PCBs and Cd in the groundwater were high in over-limit ratio. The gaseous PCBs and the PMlO-bornedPCBs and Cd were all higher in this area than in other areas in and out of the country. The assessment of carcinogenic exposure dose indicates that the total carcinogenic exposure dose of PCBs and Cd is 6. 8 and 6. 1 times as high as the acceptable daily intake, respectively. The total carcinogenic risk was 1. 10E-03, much higher than the acceptable carcinogenic risks stipulated by other countries and regions. The analysis of carcinogenic contribution rate suggests that oral ingestion was the main pathway of exposure to the carcinogenic risk. Vegetable, rice and groundwater were the main sources of carcinogenic PCBs and Cd in this area.关键词
多氯联苯/镉/多介质/致癌/风险评估Key words
Polychlorinated biphenyls/Cadmium/Multi-media/Carcinogenic/Risk assessment分类
资源环境引用本文复制引用
邓绍坡,骆永明,宋静,滕应,陈永山..典型地区多介质环境中多氯联苯、镉致癌风险评估[J].土壤学报,2011,48(4):731-742,12.基金项目
国家自然科学基金项目(40810180,40871155)、中国科学院知识创新工程重要方向项目(KZCX2-YW-404)、科技部863重点项目(2009 AA063104)资助《作者简介》=邓绍坡(1981-),男,河南洛阳人,博士研究生,主要从事污染场地风险评估研究.E-mail:spdeng@issas.ac.cn （40810180,40871155）
