Zhao, P., Gong, W., Mao, G. et al. Pollution of HCHs, DDTs and PCBs in tidal flat of Hangzhou Bay 2009–2013., Chin. J. Ocean. Limnol. 34, 539–548 (2016). https://doi.org/10.1007/s00343-016-4384-y
DOI:
Zhao, P., Gong, W., Mao, G. et al. Pollution of HCHs, DDTs and PCBs in tidal flat of Hangzhou Bay 2009–2013., Chin. J. Ocean. Limnol. 34, 539–548 (2016). https://doi.org/10.1007/s00343-016-4384-yDOI:
Pollution of HCHs, DDTs and PCBs in tidal flat of Hangzhou Bay 2009–2013
摘要
Abstract
The concentration and distribution of three persistent organic pollutants (hexachlorocyclohexanes (HCHs)
dichlorodiphenyltrichloroethanes (DDTs) and polychlorinated biphenyls (PCBs)) was assessed in tidal flat sediments collected from the south bank of Hangzhou Bay
China from 2009 to 2013. Gas chromatography coupled to triple quadrupole mass spectrometry (GC-MS/MS) was used for analysis
based on United States Environmental Protection Agency methods EPA8080A
EPA8081B
and EPA3550B. The results showed that the levels of HCHs
DDTs and PCBs decreased in the order of DDTs < HCHs < PCBs
and their mass fractions ranged from 0.29–32.91
0.09–13.19 and 0.16–4.10 μg/kg (dry mass)
respectively. The levels of HCHs
DDTs and PCBs decreased slowly from 2009 to 2013
with considerably greater concentrations in winter than in spring and summer. In this study area
the concentrations of DDTs and HCHs decreased gradually towards the mouth of Hangzhou Bay
while the concentrations of PCBs were related to changes in the local economy. In addition
the sources of HCHs and DDTs were identified as atmospheric precipitation and historical residues. Finally
we predicted that PCBs pollution primarily originated from Aroclor 1254(Lot A4)
which might root in the illegal demolition and stacking of abandoned paint
transformer or electronic equipment in the south bank of Hangzhou Bay.
关键词
Keywords
references
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