Air-Water Gas Exchange of Organochlorine Pesticides (OCPs) in Honghu Lake, China
Ningombam Linthoingambi Devi1, Qi Shihua1, Lv Chunling1, Yang Dan1, Ishwar Chandra Yadav2
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1Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences,
388 Lumo Road, Wuhan, Hubei, 430074, P.R. China
2Centre of Advanced Study in Botany, Banaras Hindu University,
Varanasi-221005, UP, India
Pol. J. Environ. Stud. 2011;20(4):869-875
Air, water, dry particulate, and wet deposition samples were collected to estimate the air-water mass transfer coefficient at Honghu Lake, China, 2005-06. Collected samples were analyzed by using gas chromatography with electron capture detection (Agilent 6890 GC-ECD). Concentration vs. flux of α-HCH (1,348 ng m-2·m-1) was found to be higher volatilization in atmosphere in the month of March; however δ-HCH (286 ng m-2·m-1) was deposited in water body. Further, p,p′-DDE (380 ng m-2·m-1) metabolite was higher in Honghu lake atmosphere. The ratios of p,p′-DDE/p,p′-DDT and o,p′-DDT/p,p′-DDT indicated recent use of DDT and dicofol in Honghu Lake. The α-endosulfan (640 ng m-2·m-1) was also found to be more deposited in the water body compared to β-endosulfan.
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