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Issue 6, 2007
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Passive air sampling of DDT, chlordane and HCB in the Pearl River Delta, South China: implications to regional sources

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Abstract

The Pearl River Delta (PRD) is one of the largest fast-developing economic zones in China. Hong Kong and the mainland part of the PRD differed in socio-economic development history and chemical management policies. Polyurethane foam (PUF)-passive air sampling (PAS) was deployed at 21 regional air quality monitoring stations across the PRD in summer and winter, respectively. Dichloro-diphenyl-trichloroethane (DDT), chlordane and hexachlorobenzene (HCB) were analyzed with GC-MS. High total DDT (240–3700 pg m−3) and chlordane (100–2600 pg m−3) concentrations were observed. Concentrations of DDTs and chlordane were higher in summer than winter; HCB vice versa. Spatially, the mainland part of the PRD generally displayed higher DDT concentrations than Hong Kong. Antifouling paint for fishing ships in coastal China was suggested to be an important current DDT source in the coast. The reason is unknown for the very low trans-/cis-chlordane (TC/CC) ratios (0.27) found in the mainland in winter. HCB concentrations were relatively uniform across the PRD, and long range transport of HCB from inland/North China to the PRD in winter was suggested.

Graphical abstract: Passive air sampling of DDT, chlordane and HCB in the Pearl River Delta, South China: implications to regional sources

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Publication details

The article was received on 18 Jan 2007, accepted on 11 Apr 2007 and first published on 11 May 2007


Article type: Paper
DOI: 10.1039/B700798A
Citation: J. Environ. Monit., 2007,9, 582-588
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    Passive air sampling of DDT, chlordane and HCB in the Pearl River Delta, South China: implications to regional sources

    J. Wang, L. Guo, J. Li, G. Zhang, C. S. L. Lee, X. Li, K. C. Jones, Y. Xiang and L. Zhong, J. Environ. Monit., 2007, 9, 582
    DOI: 10.1039/B700798A

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