State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
Environ Sci Technol. 2011 Jun 1;45(11):4696-701. doi: 10.1021/es200112m. Epub 2011 May 4.
Measurements of atmospheric deposition fluxes and temporal variation of halogenated flame retardants (HFRs) from 2007 to 2008 at urban, electronic waste (e-waste), and rural sites in southern China are presented. The deposition fluxes of total HFRs at the urban (99.3-1327 ng m(-2) day(-1)) and e-waste (79.1-1200 ng m(-2) day(-1)) sites were much higher than at the rural site (9.27-79.5 ng m(-2) day(-1)), demonstrating that e-waste recycling and industrial activities in southern China are two important sources of HFRs in the environment. The urban deposition profile was dominated by current-use HFRs (decabrominated diphenyl ether and decabromodiphenyl ethane), whereas the profile at the e-waste site reflects the past when significant amounts of PBDEs and Dechlorane Plus were used. Source apportionment estimated by principal component analyses with multiple linear regression analysis showed that deposition HFRs at the rural site were primarily contributed by the urban and e-waste sources (45% and 38%, respectively) compared to the contribution from local emission (17%). Our results suggest that the HFRs that are readily present in gas or sorbed onto fine particle phases have enhanced potential for long-range atmospheric transport.
本研究于 2007 年至 2008 年，在华南地区的城区、电子废物（电子垃圾）和农村等 3 个地点，对大气沉降通量及卤代阻燃剂（HFRs）的时间变化进行了测量。城区（99.3-1327ng·m(-2)·d(-1)）和电子废物（79.1-1200ng·m(-2)·d(-1)）站点的 HFRs 总沉降通量远高于农村站点（9.27-79.5ng·m(-2)·d(-1)），表明中国南方的电子废物回收和工业活动是环境中 HFRs 的两个重要来源。城区的沉降剖面以当前使用的 HFRs（十溴二苯醚和十溴二苯乙烷）为主，而电子废物站点的剖面则反映了过去大量使用多溴联苯醚和十氯酮的情况。通过主成分分析与多元线性回归分析相结合的源分配估计，表明与本地排放（17%）相比，农村站点的沉积 HFRs 主要来自城区和电子废物源（分别为 45%和 38%）。研究结果表明，那些易于存在于气体中或被细颗粒相吸附的 HFRs，具有增强的远距离大气传输潜力。
