再生塑料袋包装食品对人体的健康风险评价

再生塑料袋由塑料废弃物经加工处理后制成,含有很多有毒有害物质。但由于其价格便宜,市场竞争力极大,在熟食包装市场上占据着很大的份额。文章运用美国的健康风险评价框架,设计了两种典型模拟场景试验,测试了不同颜色的再生塑料袋在一定条件下,有害物质在食品模拟物中的溶出量;并对食用再生塑料袋包装的食品可能给人体带来的健康风险进行了评价。美国EPA定义,致癌风险指数超过10-6时,会对人体健康产生致癌危害;非致癌风险指数超过1时,会对人体健康产生非致癌危害。根据评价结果,五种颜色的再生塑料袋均不存在致癌风险。对于非致癌风险,蓝色、黄色和和白色再生塑料袋的非致癌风险值均低于1,不会对人体产生明显的健康危害。而黑色和红色再生塑料袋中非致癌风险值和总风险值均超过临界值1,会对人体产生非致癌健康危害,其中红色再生塑料袋对人体的健康危害最大。

Human Health Risk Assessment on Contaminants in Recycled Plastic Bags Packaged Foods

Recycled plastic bags which are made from plastic waste contain many toxic and hazardous substances.However,because of its cheapness,the recycled plastic bags occupy large market share.Two kinds of simulated tests were designed,and amount of harmful substances moved from different colors of recycled plastic bags to food stimulants under certain conditions were designed.To make use of health risk assessment framework of EPA,health risks of human body was done for recycled plastic bags to package food.Based on assessment results,total carcinogenic risk and non-carcinogenic risk values of blue,yellow and white bags are less than 1,showing that the hazardous substances will not produce a significant hazard on human health.But the risk assessment of black and red plastic bags,risk values of Pb both exceed the critical value 1,showing that hazardous substances of black and red recycled plastic bags arouse a non-carcinogenic health risk to human body.