Temporal trends of PCBs, PCDD/Fs and PBDEs in soils from an E-waste dismantling area in East China
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Date
2013
Journal Title
Journal ISSN
Volume Title
Publisher
Environmental Science
Abstract
The temporal trends of polychlorinated biphenyls (PCBs), polychlorinated dibenzo-p-dioxins and
dibenzofurans (PCDD/Fs) and polybrominated diphenyl ethers (PBDEs) were investigated in soils from
an E-waste dismantling area in East China between 2005 and 2011. Isotope dilution high resolution gas
chromatography/high resolution mass spectrometry (HRGC/HRMS) was employed for the sample
analysis. PCB levels declined as expected, while PCDD/Fs generally remained at a constant level during
the sampling period, and PBDE concentrations tended to be slightly lower after 2007 although the
decline was not statistically significant. The congener profiles indicated that lowly-halogenated
congeners of these persistent organic pollutants (POPs) accounted for the decreasing levels and relative
proportions of the POPs, suggesting that they have been gradually eliminated from the field soil over
the years. However, the concentration levels of some heavy congeners (e.g., CB-209, OCDD and OCDF)
showed different trends from those of the lighter ones. The general tendencies of the three types of
POPs in soils were consistent with those reported in other studies in this area. The results implied that
the enhanced regulations and centralized dismantling action introduced in 2005 might exert a limited
influence on these three types of POPs in soils during the sampling period.
Description
Keywords
Temporal trends, PCBs, PCDD/Fs and PBDEs, Soils, E-waste dismantling area
Citation
Wang, P., Zhang, H., Fu, J., Li, Y., Wang, T., Wang, Y., ... & Jiang, G. (2013). Temporal trends of PCBs, PCDD/Fs and PBDEs in soils from an E-waste dismantling area in East China. Environmental Science: Processes & Impacts, 15(10), 1897-1903. DOI: 10.1039/c3em00297g