Residues of organochlorine pesticides in near shore waters of LaiZhou Bay and JiaoZhou Bay, Shandong Peninsula, China

• Published in: Chemosphere (Oxford) 2007-05, Vol.68 (1), p.126-139
• Main Authors: Xu, Xiaoqin, Yang, Huanghao, Li, Qingling, Yang, Baijuan, Wang, Xiaoru, Lee, Frank S.C.
• Format: Article
• Language: English
• Subjects: Applied sciences; China; coastal plains; detection; Distribution; Earth sciences; Earth, ocean, space; ECD; Engineering and environment geology. Geothermics; Exact sciences and technology; Gas Chromatography-Mass Spectrometry - methods; Hydrocarbons, Chlorinated - analysis; isomers; JiaoZhou Bay; LaiZhou Bay; Natural water pollution; organochlorine pesticides; pesticide residues; Pesticide Residues - analysis; pollutants; Pollution; Pollution, environment geology; population density; quantitative analysis; seawater; Seawater - chemistry; Seawaters, estuaries; Water Pollutants, Chemical - analysis; water pollution; Water treatment and pollution
• ISSN: 0045-6535; 1879-1298
• DOI: 10.1016/j.chemosphere.2006.12.021

The extent of organochlorine pesticides (OCPs) contamination in coastal waters around LaiZhou Bay and JiaoZhou Bay in Shandong Peninsula, northern China, was investigated. The areas around the two bays are both densely populated, thrived with intensive agriculture and industrial activities. Multi-techniques including GC–MS, GC–μECD coupled with chemical peak confirmation and strict QC procedures were used for the quantitative determination of 15 OCPs including alpha, beta, gamma and delta isomers of hexachlorocyclohexane (HCH), pentachloronitrobenzene (PCNB), heptachlor, aldrin, endosulfan, p, p′-DDE, dieldrin, endrin, p, p′-DDD, o, p′-DDT, p, p′-DDT and methoxychlor. The survey results show that contaminations by OCP residues remain widespread in the areas, but the averaged concentration levels are all below the regulatory limits, e.g., CMC limits (acute criterion values) specified in US Environmental Protection Agency (USEPA) and China national standards. Average concentration of OCPs in water samples were from undetectable to 3.8 ng l −1 in LaiZhou Bay and from 0.1 to 3.9 ng l −1 in JiaoZhou Bay, respectively. A comparison between the current and historical data shows a rapidly decreasing trend of OCPs over the past twenty years in the study areas.