Chen She-Jun, Ding Nan, Zhu Zhi-Cheng, Tian Mi, Luo Xiao-Jun, Mai Bi-Xian
State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China.
Environ Res. 2014 Nov;135:190-5. doi: 10.1016/j.envres.2014.09.013. Epub 2014 Oct 2.
Halogenated flame retardants (HFRs) are a class of ubiquitous pollutants in the environment and attract increasing attention. In the present study, HFR concentrations were measured in indoor and outdoor dust in an important industrial city (Dongguan) in southern China, in which their presence and associated human exposure are unknown. The HFRs were dominated by polybrominated diphenyl ethers (PBDEs) and decabromodiphenyl ethane (DBDPE), with mean concentrations of 2365 and 2441 ng/g in the indoor dust, respectively, which were 2-3 order of magnitude higher the concentrations of other HFRs. However elevated tri- to hepta-BDE concentrations (869 ng/g) were found in Houjie Town, a furniture manufacturing center. The mean indoor/outdoor (I/O) ratios of HFR concentrations in the dust were all larger than one (1.55-16.4), suggesting the importance of indoors sources for HFRs in indoor dust in this industrial city. Principal component analysis (PCA) showed that the correlations among the HFRs in the indoor dust probably revealed differences in their commercial applications, while most HFRs in the outdoor dust have similar sources except for phased-out BDE47 and 99. The compositions of lower brominated PBDEs varied among the towns, probably due to their different sources or influence of photo-degradation. Nevertheless, the similar composition of highly brominated congeners indicated little photo-degradation encountered in the ambient environment. The non-cancer risk associated with indoor dust ingestion is low for the general population in Dongguan, but some children in the furniture manufacturing center have significantly high risk of exposure to banned PBDEs.
卤代阻燃剂（HFRs）是一类在环境中普遍存在的污染物，日益受到关注。在本研究中，对中国南方一个重要工业城市（东莞）室内和室外灰尘中的HFRs浓度进行了测量，该市HFRs的存在情况及相关的人体暴露情况尚不清楚。HFRs以多溴二苯醚（PBDEs）和十溴二苯乙烷（DBDPE）为主，室内灰尘中的平均浓度分别为2365和2441 ng/g，比其他HFRs的浓度高2 - 3个数量级。然而，在家具制造中心厚街镇发现三至七溴二苯醚浓度升高（869 ng/g）。灰尘中HFRs浓度的室内/室外（I/O）平均比值均大于1（1.55 - 16.4），表明在这个工业城市中，室内来源对室内灰尘中HFRs的重要性。主成分分析（PCA）表明，室内灰尘中HFRs之间的相关性可能揭示了它们商业应用的差异，而室外灰尘中的大多数HFRs除了已淘汰的BDE47和99外，来源相似。较低溴化的多溴二苯醚的组成在不同城镇之间有所不同，可能是由于它们的来源不同或光降解的影响。尽管如此，高溴化同系物的相似组成表明在环境中遇到的光降解很少。东莞普通人群因摄入室内灰尘而产生的非癌症风险较低，但家具制造中心的一些儿童接触禁用多溴二苯醚的风险显著较高。
