大亚湾海域典型有机氯农药生物累积特征及变化因素研究

丘耀文; 张干; 郭玲利; 李向东; 李军

大亚湾海域典型有机氯农药生物累积特征及变化因素研究

1.
中国科学院南海海洋研究所热带海洋环境动力学重点实验室, 广东广州 510301;中国科学院广州地球化学研究所有机地球化学国家重点实验室, 广东广州 510640
2.
中国科学院广州地球化学研究所有机地球化学国家重点实验室, 广东广州 510640
3.
香港理工大学土木工程系, 香港

基金项目: 国家自然科学基金资助项目(40573061,40473041,40590391);中国博士后科学基金资助项目(2005038505)

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出版历程
- 收稿日期: 2006-04-08
- 修回日期: 2006-10-11

Study of typical organochlorine pesticides bioaccumulation and influence factors in Daya Bay

1.
Key Laboratory of Tropic Marine Environmental Dynamics, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China;State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
2.
State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
3.
Department of Civil and Structural Engineering, Hong Kong Polytechnic University, Hong Kong, China

摘要

摘要: 于2003年采集大亚湾海域28个鱼类等生物样品和14个表层沉积物样品,分析其中滴滴涕(DDTs)、六六六(HCHs)和氯丹(CHLs)各组分的含量以及脂含量和δ¹⁵N,δ¹³C同位素值,重点研究了大亚湾沉积物和生物体中有机氯农药(OCPs)的污染现状及其生物积累规律.大亚湾海域鱼类DDTs,HCHs和CHLs平均含量分别为57.1±52.9,0.30±0.18和0.87±0.35ng/g(湿重);与其他海区相比,该海域生物体中DDTs的含量相对较高,HCHs和CHLs较低;表层沉积物中高的p,p'-DDT含量及较低的(DDE+DDD)/DDT比值(平均为0.56,<1),均显示仍有新的DDTs源输入;OCPs在生物累积中表现出脂溶性的特征,生物体内脂含量越高,其OCPs含量也越高;δ¹⁵N,δ¹³C同位素的研究结果显示肉食性生物比植食性生物更易累积OCPs;大亚湾海域OCPs的生物-沉积物累积系数(BSAF)与有机物的亲脂性程度即辛醇-水比值(K_OW)存在显著的正相关.
- 有机氯农药(OCPs) /
- 滴滴涕(DDTs) /
- δ¹⁵N同位素 /
- 生物累积 /
- 大亚湾
Abstract: 28 organism and 14 surface sediment samples from Daya Bay were collected to determine the compositions and concentrations of dichlorodiphenyltrichloroethanes(DDTs),hexachloro cyclohexanes (HCHs) and chlordanes(CHLs) in 2003.Stable isotope δ¹⁵N,δ¹³C values and lipid contents in organism were also measured.Attention was paid to study the OCPs pollution status in sediment and organisms and their bioaccum ulation law in Day a Bay.Average concentrations of DDTs,HCHs and CHLs in fishes were 57.1 52.9,0.30 0.18 and 0.87 0.35 ng/g wet weight,respectively.DDTs levels in organisms from Daya Bay were relatively higher and HCHs and CHLs levels were lower compared with those in other waters.High percent of p,p-DDT levels in surface sediments and relatively low(DDE+DDD) /DDT ratios (mean 0.56,<1) indicated new DDTs sources input to the bay.OCPs bioaccumulation was found to have a liposoluble charact eristics,the higher lipid content in organism the more OCPs accumulating in organism.Research on δ¹⁵N and δ¹³C in organisms showed that carnivorous fishes are liable to accumulate OCPs than planktivorous fishes.Significant correlation was observed between Biota-Sediment Accumulation Factors(BSAF) of OCPs and their lipophilic property,i.e.ratios of octanol/water(K_OW),in the waters of Daya Bay.
- organochlorine pesticides(OCPs) /
- dichlorodipheny ltrichloroethane(DDTs) /
- δ¹⁵N isotope /
- bioaccumulation /
- Daya Bay

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