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Occurrence of polybrominated diphenyl ethers in floor and elevated surface house dust from Shanghai China

机译：来自中国上海的地板和高架地板房屋粉尘中发生多溴二苯醚

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House dust is the main source of human exposure to flame retardants by ingestion. This study investigated the occurrence of polybrominated diphenyl ethers (PBDEs) in indoor dust from 22 houses in Shanghai, China. House dust was separately collected from the floor and elevated furnishings surface (mostly between 0.5 and 2 m height) for comparison. The concentrations of ∑22 PBDEs ranged from 19.4 to 3280 ng/g (with a geometric mean of 203 ng/g) and from 55.1 to 792 ng/g (with a geometric mean of 166 ng/g) in floor dust (FD) and elevated surface dust (ESD), respectively. BDE-209 was the predominant congener, accounting for about 73.1% of total PBDE burdens. In terms of congener profiles, the comparison of FD and ESD revealed no significant differences except for the ratio of BDE-47/BDE-99. ESD samples displayed a ratio of BDE-47/BDE-99 very similar to commercial penta-BDE products DE-71 while the ratio in FD was exceptionally higher. Significant correlation was found between concentrations of commercial penta-BDE compositions in FD and ESD (p < 0.05). Except for some occasional values, PBDE levels in house dust exhibited temporal stability. Human exposure to PBDEs via dust ingestion was estimated. The highest daily intake of PBDEs was for toddlers by using 95th percentile concentrations of PBDEs via high dust ingestion in FD (23.07 ng/kg bw/day). About 20-fold difference in exposure estimates between toddlers and adults supports that toddlers are facing greater risk from indoor floor dust. Expectedly, this study highlighted the point that residents in Shanghai were exposed to low doses of PBDEs in house dust.Electronic supplementary materialThe online version of this article (10.1007/s11356-018-1968-4) contains supplementary material, which is available to authorized users.
机译：室内灰尘是人类通过摄入暴露于阻燃剂的主要来源。这项研究调查了中国上海22家房屋的室内灰尘中多溴联苯醚（PBDEs）的发生情况。从地板和高架家具表面（通常在0.5至2 m高）上分别收集室内灰尘以进行比较。地板粉尘（FD）中∑22 PBDEs的浓度范围为19.4至3280 ng / g（几何平均值为203 ng / g）和55.1至792 ng / g（几何平均值为166ng / g）和表面灰尘（ESD）。 BDE-209是主要的同源物，约占多溴二苯醚总负担的73.1％。就同​​类物而言，FD和ESD的比较显示，除了BDE-47 / BDE-99的比率外，没有显着差异。 ESD样品的BDE-47 / BDE-99比率与商用五溴联苯醚产品DE-71非常相似，而FD比率则异常高。发现FD和ESD中商用五溴二苯醚组合物的浓度之间存在显着相关性（p <0.05）。除一些偶然的值外，房屋尘埃中的多溴二苯醚含量表现出时间稳定性。估计人类通过吸入粉尘接触多溴二苯醚。每天摄入的PBDEs最高，是通过FD高粉尘摄入量（23.07 ng / kg bw /天）使用浓度为95％的PBDEs。幼儿与成人之间的接触估计差异约有20倍，这表明幼儿面临着室内地板灰尘的更大风险。可以预期，这项研究突显了上海居民在室内灰尘中暴露于低剂量的多溴二苯醚的这一点。电子补充材料本文的网络版本（10.1007 / s11356-018-1968-4）包含补充材料，可授权使用用户。

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