太平洋两大典型鱿钓渔场鱿鱼有机氯农药赋存及健康风险评估

Organochlorine pesticides in squids from the two typical squid fisheries in Pacific Ocean:Occurrence and health risks

有机氯农药(OCPs)已禁用多年,但仍在环境中广泛检出.太平洋是污染物重要的汇.南北半球发展水平、地理环境等因素差异较大,将导致南北太平洋污染水平显著差异.鱿鱼具有分布广泛、易富集、指示性强、经济价值高等特点.因此,对采集的北太平洋和南太平洋两大典型鱿钓渔场鱿鱼OCPs进行了分析,以指示南北半球鱿鱼生活区域该类污染物的特征,并评估沿岸居民通过摄食两区域鱿鱼带来的健康风险.研究结果表明,北太平洋鱿钓渔场鱿鱼中OCPs赋存水平及检出种类明显高于南太平洋鱿钓渔场鱿鱼,但低于其他海域头足类的浓度.OCPs在组织间表现出明显差异,消化腺中OCPs检出浓度和种类均高于胃和肌肉.滴滴涕(DDTs)是北太平洋鱿钓渔场鱿鱼中的主要化合物.艾氏剂(Alldrin)、α-氯丹(α-Chlordane)和p,p’-滴滴伊(p,p’-DDE)是南太平洋鱿钓渔场鱿鱼中主要化合物.鱿鱼体内六六六(HCHs)主要以β-HCH形式存在.相关性分析、DDTs和HCHs组成特征均表明目前没有新的工业品来源.北太平洋鱿钓渔场可能有少量农用林丹输入.健康风险评价表明,摄食两个区域采集的鱿鱼肌肉样品均不会造成接触风险和致癌风险.

Organochlorine pesticides(OCPs)have been phased out for decades but they are still widely detected in the environment.The Pacific Ocean is the important sinks for the pollutants.The development level,geographical features and other factors of the northern and southern hemispheres are quite different,which will lead to significant differences in OCP occurrence between the North and South Pacific.Squid has the characteristics of wide distribution,easy enrichment,strong indication and high economic values.In this study,squids collected from typical squid fishing grounds in the North Pacific and South Pacific were analyzed to determine concentrations,composition and possible sources.Besides,the health risk of OCPs in squid samples was investigated through ingestion of squid.The results showed that both the detected congeners and concentrations of OCPs in the squid from the North Pacific were significantly higher than those in the South one.OCPs showed significant differences among tissues,and the detected concentrations in the digestive gland were higher than those in the stomach and muscle.DDTs were the main compounds in the squid from North Pacific squid fishing grounds.Aldrin,α-Chlordane and p,p'-DDE were the main compounds in the squid of South Pacific.HCHs in the squid mainly existed in the form ofβ-HCH.There was no new source of industrial products for DDTs and HCHs,but a small amount input of lindane in the North Pacific squid fishing grounds.The health risk assessment indicated that ingestion of the squid muscle samples collected from both the two regions poses no carcinogenic risk to human being.