Temporal trends (2005-2009) of PCDD/Fs, PCBs, PBDEs in rice hulls from an e-waste dismantling area after stricter environmental regulations
Temporal trends (2005-2009) of PCDD/Fs, PCBs, PBDEs in rice hulls from an e-waste dismantling area after stricter environmental regulations
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DOI：
10.1016/j.chemosphere.2012.03.006
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发表时间：
2012-07-01
期刊：
影响因子：
8.8
通讯作者：
Jiang, Guibin
中科院分区：
文献类型：
--
作者：
Fu, Jianjie;Wang, Thanh;Jiang, Guibin
由于严重的环境和人类健康问题，原始的电子废物拆解活动日益受到关注，因此中国当局加强了对非法电子废物回收活动的监管。本研究以水稻船体为被动采样器，调查了电子垃圾回收站附近区域在严格管制后多氯二苯并二恶英（PCDD/Fs）、多氯联苯（PCBs）、多溴联苯醚（PBDEs）的时间变化趋势。此外，还讨论了这些污染物的分布规律和组成特征。2005-2009年期间，稻壳中三类持久性有机污染物的平均浓度显著下降。具体而言，多氯二苯并对二恶英/多氯二苯并呋喃从12.9（2005年的平均值）降至0.37皮克世界卫生组织毒性当量/克（干重，干重）（2009年），多氯联苯从47.6（2005年）降至7.10纳克/克（干重，干重）（2009年），多溴二苯醚从2.51（2005年）降至0.89纳克/克（干重，干重）（2009年）。燃烧标记物2，3，4，7，8-PeCDF、1，2，3，6，7，8HxCDF和多氯联苯-126以及多氯二苯并对二恶英/多氯二苯并呋喃的比例从1：9（2005年）大幅下降至7：3（2009年），这可能是对露天燃烧活动实行更严格管制的结果。研究表明，严格控制措施、加强法律法规和环保技术是减少典型电子废物拆解场相关持久性有机污染物释放和形成的有效措施，这些措施可以进一步改善环境质量和当地居民的健康。(C)2012爱思唯尔有限公司保留所有权利。
Primitive e-waste dismantling activities have been of increasing concern due to serious environmental and human health problems, and therefore authorities in China have strengthened the regulations on illegal e-waste recycling activities. In this work, we used rice hull as a passive sampler and investigated temporal trends of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs) in areas near e-waste recycling sites after the stricter regulations. Furthermore, the distribution patterns and composition profiles of these contaminants were also discussed. The average concentrations of the three groups of persistent organic pollutants (POPs) in rice hulls have markedly decreased during the period of 2005-2009. Specifically, from 12.9 (average value in 2005) to 0.37 pg WHO-TEQ/g (dry weight, dw) (in 2009) for PCDD/Fs, 47.6 (2005) to 7.10 ng g(-1) dw (2009) for PCBs, and 2.51 (2005) to 0.89 ng g(-1), dw (2009) for PBDEs. The significant decrease of combustion markers 2,3,4,7,8-PeCDF, 1,2,3,6,7,8HxCDF and PCB126, and the PCDD/PCDF ratio from 1:9 (2005) to 7:3 (2009) is likely a result of stricter regulations on open combustion activities. This study suggests that stricter control measures, strengthened laws and regulations and more environmental friendly techniques could be effective measures in reducing the release and formation of related POPs in typical e-waste dismantling sites, and these measures could further improve the quality of the environment and health of the local inhabitants. (C) 2012 Elsevier Ltd. All rights reserved.