The residues, distribution, and partition of organochlorine pesticides in the water, suspended solids, and sediments fro
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11TH FORUM OF THE INTERNATIONAL HCH AND PESTICIDE ASSOCIATION
The residues, distribution, and partition of organochlorine pesticides in the water, suspended solids, and sediments from a large Chinese lake (Lake Chaohu) during the high water level period Wen-Xiu Liu & Wei He & Ning Qin & Xiang-Zhen Kong & Qi-Shuang He & Hui-Ling Ouyang & Fu-Liu Xu
Received: 6 October 2012 / Accepted: 27 December 2012 / Published online: 12 January 2013 # Springer-Verlag Berlin Heidelberg 2013
Abstract The levels of organochlorine pesticides (OCPs) in the water, suspended solids, and sediments from Lake Chaohu during the high water level period were measured by a solid-phase extraction gas chromatograph–electron capture detector. The spatial distributions of the three phases and the water/suspended solids and sediment/water partition coefficients were analyzed. The results showed the following: (1) The mean contents of OCPs in the water, suspended solids, and sediments were 132.4 ± 432.1 ng/L, 188.1 ± 286.7 ng/g dry weight (dw), and 13.7±9.8 ng/g dw, respectively. The dominant OCP components were isodrin (85.1 %) for the water, DDTs (64.4 %) for the suspended solids, and both isodrin (48.5 %) and DDTs (31.8 %) for the sediments. (2) β-HCH was the primary isomer of HCHs in the water and sediments, and the proportions were 61.7 and 41.3 %; γ-HCH was the primary isomer in the suspended solids, accounting for 49.3 %; p,p′-DDT was the dominant content of DDTs in the water and suspended solids, whereas
Responsible editor: Philippe Garrigues Wen-Xiu Liu and Wei He are the first co-authors Electronic supplementary material The online version of this article (doi:10.1007/s11356-012-1460-5) contains supplementary material, which is available to authorized users. W.-X. Liu : W. He : N. Qin : X.-Z. Kong : Q.-S. He : H.-L. Ouyang : F.-L. Xu (*) MOE Laboratory for Earth Surface Process, College of Urban and Environmental Sciences, Peking University, No. 5 Yiheyuan Road, Haidian District, Beijing 100871, People’s Republic of China e-mail: [email protected]
p,p′-DDD was the main metabolite of DDTs in the sediments. (3) The concentrations of contaminants in the water from the western lake were greater than those from the eastern lake, but the concentrations in the suspended solids from the western lake were less than those from the eastern lake. (4) There was no significant correlation between the water–suspended solids partition coefficient Kd and the noctanol–water partition coefficient Kow, and between the sediment–water organic-C weighted sorption coefficients Koc and Kow. Keywords OCPs . Residue levels . Spatial distribution . Partition coefficient . Water . Suspended solids . Sediments . Lake Chaohu
Introduction Organochlorine pesticides (OCPs), which are typical persistent organic pollutants, were widely used in China. Due to their high toxicity, persistence, semi-volatility, and bioconcentration, OCPs are still detectable in various environmental media, such as water, sediment, soil, and air (Carrera et al. 2001; Fisk et al. 2001; De
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