徐州市售蔬菜中多环芳烃污染与健康危害

为了分析徐州市蔬菜中多环芳烃(PAHs)的污染及其对人群的健康危害,本研究于2016年5月在徐州大型农贸市场和超市采集了当地居民经常食用的7种蔬菜样品,使用气相色谱-质谱联用仪(GC-MS)分析了蔬菜样品中的8种中低环PAHs。结果表明PAHs总含量为27.7~53.8 ng·g-1,其中2、3环分别占总PAHs的45.53%、45.65%。不同类型蔬菜中PAHs含量为:叶菜类>根菜类>果菜类。运用毒性当量法计算得到徐州市不同人群对PAHs的摄食暴露量为7.88~14.65 ng·d-1,引起的致癌风险在1.79×10-7~1.08×10-6范围内,处于低致癌风险水平,但是其健康影响仍不容忽视。

Pollution and Health Hazards of PAHs in Vegetables Sold in Xuzhou City,China

In order to analyze the pollution of polycyclic aromatic hydrocarbons (PAHs) in vegetables and assess the health hazards on the population in Xuzhou, 7 kinds of vegetables, which are widely consumed by local residents, were collected in May 2016 from local large-scale farmers markets and supermarkets. 8 kinds of low and medium molecular PAHs concentrations were determined by using gas chromatography-mass spectrometry. The results showed that total PAHs concentrations ranged from 27.7 to 53.8 ng·g-1, with 2-ring and 3-ring species accounting for 45.53% and 45.65%, respectively. PAHs concentrations varied from different samples with a descending order of leafy vegetables, rhizome vegetables and fruit vegetables. The PAHs ingestion exposure levels of diverse population groups in Xuzhou estimated by toxicity equivalent method was in the range of 8.34~15.46 ng·d-1. Meanwhile, the incremental lifetime cancer risk was 1.90×10-7~1.15×10-6, indicating low potential carcinogenic risk. Despite the low estimated risk values, health effect induced by the ingestion of PAH-containing vegetables still need to be considered.