尺寸依赖性大气沉降和颗粒态有机磷阻燃剂的吸入暴露。
Size-dependent atmospheric deposition and inhalation exposure of particle-bound organophosphate flame retardants.
机构信息
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.
State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
出版信息
J Hazard Mater. 2016 Jan 15;301:504-11. doi: 10.1016/j.jhazmat.2015.09.014. Epub 2015 Sep 9.
Atmospheric size-fractionated particles were collected at different heights in an e-waste recycling zone (QY) and urban Guangzhou (GZ), China and analyzed for organophosphate flame retardants (OPFRs). The total air concentrations of eight OPFRs were 130±130 and 138±127 ng m(-3) in QY and GZ, respectively. Compositional profiles of chlorinated OPFRs were different between QY and GZ, but the size distribution patterns of all OPFRs were not significantly different at different heights. Estimated atmospheric deposition fluxes of OPFRs were 51±67 and 55±13 μg m(-2) d(-1) in QY and GZ, respectively, and the coarse particles (Dp>1.8 μm) dominated both the dry and wet deposition fluxes. Moreover, not all particle-bound OPFRs were inhalable and deposited in the human respiratory tract. The calculated inhalation doses of OPFRs were much lower than the reference doses, suggesting that potential health risk due to inhalation exposure to particle-bound OPFRs in the e-waste recycling zone and urban site was low.
在中国的电子废物回收区（QY）和广州市（GZ）的不同高度采集大气粒径分离颗粒，并对其进行有机磷酸酯阻燃剂（OPFRs）分析。QY 和 GZ 中 8 种 OPFRs 的总空气浓度分别为 130±130 和 138±127 ng m(-3)。QY 和 GZ 之间氯化 OPFRs 的组成分布不同，但所有 OPFRs 的粒径分布模式在不同高度没有明显差异。QY 和 GZ 的 OPFRs 的大气沉积通量分别为 51±67 和 55±13 μg m(-2) d(-1)，粗颗粒（Dp>1.8 μm）主导干、湿沉积通量。此外，并非所有颗粒结合态 OPFRs 都可吸入并沉积在人体呼吸道中。计算出的 OPFRs 吸入剂量远低于参考剂量，表明电子废物回收区和城市地区颗粒结合态 OPFRs 经吸入暴露造成的潜在健康风险较低。
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