Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/12718
Title: Organochlorine pesticides in the atmosphere of Guangzhou and Hong Kong : regional sources and long-range atmospheric transport
Authors: Li, J
Zhang, G
Guo, L
Xu, W
Li, X 
Lee, CSL
Ding, A
Wang, T 
Keywords: Back trajectory
Chlordane
DDT
Guangzhou
HCH
Hong Kong
OCPs
South China
Issue Date: 2007
Publisher: Pergamon Press
Source: Atmospheric environment, 2007, v. 41, no. 18, p. 3889-3903 How to cite?
Journal: Atmospheric environment 
Abstract: Organochlorine pesticides (OCPs) were measured in the atmosphere over the period of December 2003-December 2004 at four sampling sites in Guangzhou and Hong Kong. Gas phase and particle phase concentrations of 8 OCP species, including trans-chlordane (t-CHL), cis-chlordane (c-CHL), p,p′-DDT, p,p′-DDE, o,p′-DDT, α-endosulfan, α- and γ-hexachlorocyclohexane (HCH), were studied. OCPs were found predominantly in the gas phase in all seasons. t-CHL, c-CHL, o,p′-DDT, p,p′-DDT and α-endosulfan had significantly (p<0.001) higher concentrations than other OCPs, with mean values (gas+particle) typically ranging from 103 to 1440 pg m-3. In general, the concentrations of OCPs in summer were higher than that in winter, except for α-HCH which showed no clear seasonal pattern. Higher levels of γ-HCH and o,p′-DDT found in Guangzhou could be attributed to the present usage of lindane and dicofol in the Pearl River Delta (PRD) region. The very high concentrations of p,p′-DDT and α-endosulfan were observed at all sampling sites. The results of 7 days air back trajectory analysis indicated that the unusual high p,p′-DDT levels in summer in both cities could be related to the seasonal usage of DDT containing antifouling paints for fishing ships in the upwind seaports of the region. The high concentrations of α-endosulfan in winter in the study area suggested an atmospheric transport by the winter monsoon from the East China, where endosulfan is being used as insecticide in cotton fields. The consistency of the seasonal variation of concentrations and isomeric ratios of DDTs and α-endosulfan with the alternation of winter monsoon and summer monsoon suggested that the Asian monsoon plays an important role in the long-range atmospheric transport of OCPs.
URI: http://hdl.handle.net/10397/12718
ISSN: 1352-2310
EISSN: 1873-2844
DOI: 10.1016/j.atmosenv.2006.12.052
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

130
Last Week
0
Last month
0
Citations as of Nov 10, 2017

WEB OF SCIENCETM
Citations

117
Last Week
0
Last month
Citations as of Nov 16, 2017

Page view(s)

59
Last Week
2
Last month
Checked on Nov 20, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.