电子垃圾拆解对台州氯代/溴代二噁英浓度和组成的影响Impact of E-Waste Dismantling Activities on the Levels and Compositions of PCDD/Fs and PBDD/Fs in the Atmosphere of Taizhou
孙文文;周林;韩文亮;冯加良;于志强;傅家谟;
摘要(Abstract):
电子垃圾拆解会导致有毒有害污染物向大气的排放,造成环境污染的产生。为了解电子垃圾拆解及废旧金属再生活动对拆解地及邻近地区空气质量的影响,对台州峰江金属再生园区附近及对照区路桥市区大气中(气态和颗粒态)氯代二噁英(PCDD/Fs)、溴代二噁英(PBDD/Fs)的含量、同系物组成及气/固分配规律进行了研究,通过相关性分析探讨了PCDD/Fs和PBDD/Fs的可能来源。结果显示,金属再生园区冬季采样期间17种2,3,7,8-PCDD/Fs和8种2,3,7,8-PBDD/Fs的平均浓度分别为212.2 pg·m-3和17.6 pg·m-3,夏季采样期间的平均浓度分别为84.5 pg·m-3和5.4 pg·m-3,均显著高于对照点。夏季采样期间对照点处于再生园区的下风向,其二噁英浓度高于冬季,说明其受到了金属再生园区的明显影响。基于相关性分析的结果,塑料焚烧是金属再生活动中氯代和溴代二噁英的主要来源。初步的暴露风险评价表明,金属再生园区附近居民每日摄入的二噁英含量远远超过世界卫生组织规定的人体每日耐受量(1~4 pg W-TEQ·kg-1·d-1)。上述研究结果为规范电子垃圾拆解活动提供了基础数据。
关键词(KeyWords): 氯代二噁英;溴代二噁英;电子垃圾拆解;台州
基金项目(Foundation): 国家自然科学基金项目(40775084,20877052,41173097)
作者(Author): 孙文文;周林;韩文亮;冯加良;于志强;傅家谟;
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