中文关键词上海市有机氯农药稻米残留水平健康风险 英文关键词Shanghaiorganochlorine pesticides (OCPs)riceresidue levelshealth risk

作者	单位	E-mail
孟媛	同济大学环境科学与工程学院, 长江水环境教育部重点实验室, 上海 200092	1631199@tongji.edu.cn
刘翠翠	同济大学环境科学与工程学院, 长江水环境教育部重点实验室, 上海 200092
仇雁翎	同济大学环境科学与工程学院, 长江水环境教育部重点实验室, 上海 200092	ylqiu@tongji.edu.cn
周轶慧	同济大学环境科学与工程学院, 长江水环境教育部重点实验室, 上海 200092
朱志良	同济大学环境科学与工程学院, 长江水环境教育部重点实验室, 上海 200092

中文摘要 中国作为农药的生产和使用大国，曾大量使用滴滴涕（DDTs）、六六六（HCHs）等有机氯农药.水稻是上海市的主要粮食作物，青浦和崇明区是其重要的水稻种植基地.本研究检测了上海市青浦和崇明区稻米样品中24种有机氯农药的残留水平，分析了OCPs的组成特征并对上海地区稻米中的OCPs残留进行了健康风险评价.结果表明，研究区稻米中OCPs以DDTs和HCHs为主要残留物.青浦和崇明稻米中24种OCPs的总平均残留量分别为6.53 ng·g^-1和4.70 ng·g^-1，低于食品安全国家标准中对应OCPs的再残留限值.青浦区稻米中4，4-DDE和β-HCH的残留水平最高，崇明区稻米则以2，4-DDT和β-HCH为主要成分.来源解析显示，上海市区域内近期可能仍有三氯杀螨醇和林丹的使用.健康风险评价结果表明，食用本研究区稻米因OCPs所产生的致癌与非致癌风险较低，处于可接受水平. 英文摘要 As one of the main producers and consumers of pesticides in the world, China has historically used large quantities of organochlorine pesticides, such as DDT and HCH. Rice is a staple food crop in Shanghai, where the Qingpu and Chongming districts are two important rice planting areas. This study detected the residue levels of 24 organochlorine pesticides (OCPs) in rice samples collected from Qingpu and Chongming in Shanghai. The composition and health risk of OCPs in rice samples were investigated. The results revealed that DDTs and HCHs were the main OCPs in rice from the study area. The mean levels of 24 OCPs residues in rice from Qingpu and Chongming were 6.53 ng·g^-1 and 4.70 ng·g^-1, respectively. The analyses of all the target compounds met the China National Food Safety Standard. The concentrations of 4,4-DDE and β-HCH were the highest in rice from Qingpu, while 2,4-DDT and β-HCH were the main components in rice from Chongming. Source analysis showed that dicofol and lindane might be still used recently in some areas of Shanghai. The health risk assessment results indicated that there was no obvious risk to human health by eating rice from Shanghai based on the OCPs studied.

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