摘要
以沈阳市不同功能区为研究对象,进行不同功能区的二噁英含量与暴露风险分析。研究表明:沈阳市不同功能区的二噁英质量浓度大小顺序为工业区>居民区>文化区>商业区>公园>风景区;6个功能区均检测出多氯二苯并二噁英(PCDDs)、多氯二苯并呋喃(PCDFs)和多氯联苯(PCB)3种污染物,除风景区外,PCDFs所占比例最大,PCDDs居第二位,PCB所占的比例最小;毒性当量的计算结果表明,不同功能区的二噁英毒性当量浓度与其质量浓度大小顺序一致;呼吸暴露量计算结果表明,儿童的呼吸暴露量高于成人,说明儿童受到空气二噁英的呼吸暴露风险更大。
The ambient air dioxin levels and exposure risk in different functional zones of Shenyang was analyzed in this paper. The results showed that the content of dioxins in different functional zones followed the order of indus- trial area〉residential area 〉 cultural area 〉 commercial area 〉 park 〉 scenic area. Polychlorinated dibenzofurans （PCDFs）, polychlorinated dibenzoparadioxins （PCDDs） and polychlorinated biphenyls （PCB） were detected in all functional zones. Except scenic area, PCDFs had the highest share of dioxins in Shenyang, and followed by PCDDs and PCB. Exposure risk of dioxins was quantitative analyzed by toxicity equivalency quantity （TEQ）. Industrial area had the highest TEQ value, and the next followed the order of residential area〉cultural area〉 commercial area〉 park〉scenic area. The exposure inhalation amount of children was higher than that of adults, which implied that children had higher exposure risk of dioxin pollution in ambient air.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2013年第2期82-84,共3页
Environmental Pollution & Control
