宁波居民食用水产品中多环芳烃的富集规律及健康风险评估

Polycyclic Aromatic Hydrocarbon Accumulation Patterns and Related Health Risk Assessment of Aquatic Products in Ningbo

利用GC-MS测定2013年~2014年不同季节宁波市居民日常食用29种水产品中多环芳烃（PAHs）的含量,分析季节性富集规律,并估算宁波市居民食用水产品的PAHs暴露量,评估水产品中PAHs的人体健康风险及不确定性。研究发现,水产品中16种PAHs总含量（以湿重计）分别为（46.31±40.19）ng/g（春季）、（46.01±22.20）ng/g（秋季）、（31.93±19.13）ng/g（冬季）、（30.70±24.41）ng/g（夏季）;城镇和农村居民食用水产品造成的PAHs暴露量分别为（4584.01±1212.68）ng/d和（3523.81±932.21）ng/d;城镇和农村居民终身增量健康风险分别为（5.27±5.78）×10-5和（2.94±1.81）×10-5,高于USEPA建议的可接受风险（1.0×10-6）,而低于较高的致癌风险（1.0×10-4）,表明宁波居民食用水产品存在潜在的致癌风险,应予以关注。居民食用水产品造成的PAHs致癌风险不确定性变异系数农村（0.20）高于城镇（0.16）,ED是风险评估中需要控制的关键因素。

The content of polycyclic aromatic hydrocarbons（PAHs） in 29 different aquatic products consumed by residents of Ningbo from 2013 to 2014 was determined using gas chromatography-mass spectrometry（GC-MS） to analyze seasonal accumulation patterns. The PAH exposure dose in the aquatic products consumed by Ningbo residents and the resultant health risk were evaluated. The results showed that thetotal contents of 16 PAHs（wet weight） were 46.31 ± 40.19（spring）, 46.01 ± 22.20（fall）, 31.93 ± 19.13（winter）, and 26.62 ± 24.41 ng/g（summer）. The average dose of exposure to PAHs of the urban and rural populations via consumption of contaminated aquatic products were 4584.01 ± 1212.68 and 3523.81 ± 932.21 ng/d, respectively. The incremental lifetime cancer risks for urban and rural populations were 5.27 ± 5.78 × 10-5（urban） and 2.94 ± 1.81 × 10-5（rural）, respectively, which were higher than the acceptable risk（1.0 × 10-6） and lower than that suggested by the United States Environmental Protection Agency（1.0 × 10-4）. These results indicate that there is a potential risk of cancer to Ningbo residents consuming local aquatic products, requiring urgent attention. The uncertainty coefficient of variation of cancer risk associated with PAHs for the rural area（0.20） was higher than that for the urban area（0.16）. ED is an important factor that should be controlled to reduce health risks.