Long-term temporal trends of PCBs and their controlling sources in China

Zhao, Shizhen and Breivik, Knut and Liu, Guorui and Zheng, Minghui and Jones, Kevin C. and Sweetman, Andrew J. (2017) Long-term temporal trends of PCBs and their controlling sources in China. Environmental Science and Technology, 51 (5). pp. 2838-2845. ISSN 0013-936X

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Polychlorinated biphenyls (PCBs) are industrial organic contaminants identified as persistent, bioaccumulative, toxic (PBT) and subject to long-range transport (LRT) with global scale significance. This study focuses on a reconstruction and prediction for China of long-term emission trends of intentionally and unintentionally produced (UP) ∑7PCBs (UP-PCBs, from the manufacture of steel, cement and sinter iron) and their re-emissions from secondary sources (e.g., soils and vegetation), using a dynamic fate model (BETR-Global). Contemporary emission estimates combined with predictions from the multimedia fate model suggest that primary sources still dominate, although unintentional sources are predicted to become a main contributor from 2035 for PCB-28. Imported e-waste is predicted to play an increasing role until 2020-2030 on a national scale due to the decline of IP emissions. Hypothetical emission scenarios suggest that China could become a potential source to neighbouring regions with a net output of ~0.4 t year-1 in the case of 7 PCBs around 2050. However, future emission scenarios and hence model results will be dictated by the efficiency of control measures.

Item Type:
Journal Article
Journal or Publication Title:
Environmental Science and Technology
Additional Information:
This document is the Accepted Manuscript version of a Published Work that appeared in final form in Environmental Science & Technology, copyright © 2017 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/abs/10.1021/acs.est.6b05341
Uncontrolled Keywords:
?? environmental chemistrygeneral chemistrychemistry(all) ??
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Deposited On:
14 Feb 2017 09:08
Last Modified:
16 Jul 2024 10:24