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    Rights statement: 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

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

Research output: Contribution to journalJournal articlepeer-review

Published
<mark>Journal publication date</mark>7/03/2017
<mark>Journal</mark>Environmental Science and Technology
Issue number5
Volume51
Number of pages8
Pages (from-to)2838-2845
Publication StatusPublished
Early online date27/01/17
<mark>Original language</mark>English

Abstract

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.

Bibliographic note

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