珠三角电子垃圾拆解区室内环境中多溴联苯醚的人体暴露

Human exposure to PBDEs in indoor environment at an e-waste area in Pearl River Delta

通过对清远市电子垃圾拆解区11户居民室内积尘和室内空气颗粒物中PBDEs和PBB153赋存量和赋存特征的分析,以及利用环境保护部近年编著的《中国人群暴露参数手册》中的暴露参数对该地区的人群暴露量和暴露特征进行评估.结果表明,研究区域居民室内积尘中PBDEs的含量为646—7862 ng·g^(-1),室内空气颗粒物中含量为477—1579 pg·m-3; PBDEs及其各单体以及PBB153在室内积尘和室内空气颗粒物中的含量之间具有显著的相关性(r=0.629—0.895,P<0.05),其主要来源可能是室外输送;男性成人、女性成人和儿童(9—12岁)对室内环境介质中PBDEs的总暴露量分别为2507±2099、2831±2400、8455±7382 pg·kg^(-1)·d^(-1)bw.对不同暴露途径而言,所有暴露人群经口摄入积尘中上述化合物的日均暴露量占总日均暴露量的比例最高,其次是经呼吸暴露,经皮肤暴露相对较低.对于不同暴露人群而言,儿童经皮肤暴露摄入上述化合物的比例相对最高,而男性成人经呼吸摄入上述化合物的比例相对最高.

Human exposure to PBDEs and PBB153 in indoor dust and in indoor air of 11 households at an e-waste recycling area in Qingyuan City was investigated. Using the exposure parameters in the＂Exposure Factors Handbook of Chinese Population＂compiled by the Ministry of EnvironmentalProtection,the human exposure dose and its characteristics in this area were assessed. The results showed that the PBDEs levels in indoor dust and indoor air particulate were 647—7862 ng·g-1 and477—1579 pg·m-3,respectively. And there was a significant correlation between the levels of PBDEs and PBB153 in indoor dust and indoor air particles（ r = 0.629— 0. 895,P 0. 05）. Their main source may be from outdoors. The total exposure to PBDEs in indoor environmental media of male adults,female adults and children（ 9—12 years old） were 2507 ± 2099,2838 ± 2400 and8455±7382 pg·kg-1·d-1 bw,respectively. For different exposure pathways,dust ingestion for the average daily exposure of these compounds was the highest,followed by inhalation exposure and skin exposure. For different exposed populations,skin exposure to these compounds was the highest for children,while male adults had the highest intake of these compounds by breathing.