Wu Xiaowei, Wang Yan, Hou Minmin, Luo Chunling, Zhao Hongxia, Zhang Gan
Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China.
State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China.
Environ Sci Pollut Res Int. 2017 Feb;24(4):3882-3889. doi: 10.1007/s11356-016-8082-2. Epub 2016 Nov 30.
The atmospheric deposition fluxes of polybrominated diphenyl ethers (PBDEs) and Dechlorane Plus (DPs) in Dongjiang River Basin of the Pearl River Delta in South China were investigated during winter and summer, respectively. The total deposition fluxes varied from 4.74 to 27.0 ng/m/day for PBDEs and 8.77 to 206 ng/m/day for DPs, respectively. The fractions of anti-DP to the total DPs (f ) varied from 0.28 to 0.63 (mean = 0.43 ± 0.06), i.e., generally lower than those in commercial products, which might be attributed to the different environmental fates of the two isomers. Significant seasonal and spatial variations of PBDEs and DPs were observed. The deposition fluxes in summer were generally higher than those in winter, which may be due to the relatively high temperature and rainfall in summer under the influence of prevailing subtropical monsoon climate. Moreover, high deposition fluxes of PBDEs and DPs in urban areas and significant urban/rural gradient implied that local industrial activities in the urban areas were primary sources, which were further confirmed by the results of principal component analysis. The highest deposition of PBDE and DP fluxes was found at different sampling sites, suggesting PBDEs and DPs may be derived from different industries or products.
分别在冬季和夏季对中国南方珠江三角洲东江流域的多溴二苯醚（PBDEs）和十氯酮（DPs）的大气沉降通量进行了调查。PBDEs的总沉降通量分别为4.74至27.0纳克/平方米/天，DPs的总沉降通量分别为8.77至206纳克/平方米/天。反式十氯酮占总十氯酮的比例（f）在0.28至0.63之间变化（平均值 = 0.43 ± 0.06），即通常低于商业产品中的比例，这可能归因于两种异构体不同的环境归宿。观察到PBDEs和DPs存在显著的季节和空间变化。夏季的沉降通量通常高于冬季，这可能是由于在盛行的亚热带季风气候影响下，夏季温度和降雨量相对较高。此外，城市地区PBDEs和DPs的高沉降通量以及显著的城乡梯度表明，城市地区的当地工业活动是主要来源，主成分分析结果进一步证实了这一点。在不同采样点发现了PBDEs和DPs通量的最高沉降量，这表明PBDEs和DPs可能来自不同的行业或产品。
