Bioaccumulation of organochlorine pesticides (OCPs) in red, green, and brown seaweeds from the Gulf of Mannar was investigated using gas chromatography–mass spectrometry (GC–MS). The concentration of OCPs in all the seaweeds was in the order of endosulfan > endrin > HCH > DDT > aldrin > heptachlor > methoxychlor. The concentrations of HCH, endrin, endosulfan, and DDT in Sargassum wightii and Gelidiella acerosa, and HCH and endosulfan in Gracilaria verrucosa were above the limits prescribed by the European Commission. However, in Ulva lactuca, except for endosulfan, all other OCPs were below the permissible level. The bioaccumulation of OCPs in seaweeds was in the order of S. wightii > G. acerosa > Gracilaria verrucosa > U. lactuca. The results of comparative analysis of the levels of the investigated pesticides against the standard human health risk assessment revealed that pesticide exposure from seaweeds is hazardous to human health and the marine environment of the Gulf of Mannar.

使用气相色谱-质谱法（GC-MS）研究了来自马纳那湾的红色，绿色和棕色海藻中有机氯农药（OCP）的生物富集。所有海藻中OCP的浓度依次为硫丹>异狄氏剂>六氯环己烷>滴滴涕>艾氏剂>七氯>甲氧氯。HCH，异狄氏剂，硫丹，和DDT在浓度海藻wightii和Gelidiella acerosa，和HCH和硫丹在江蓠均高于由欧洲委员会规定的范围。但是，在Ulva lactuca中，除硫丹外，所有其他OCP均低于允许水平。有机氯农药在海藻生物蓄积在顺序S. wightii  >  G. acerosa > 江蓠 >  U.莴苣。根据标准人类健康风险评估对所调查农药水平的比较分析结果表明，从海藻中接触农药对曼纳尔湾的人类健康和海洋环境有害。