太湖流域(苏南地区)农业活动区人群PAEs健康风险评估

对太湖流域(苏南)无锡、常州、镇江3市经口介质(地下水、土壤、农作物共346个样品)中15种PAEs的污染状况进行实验室分析,采用US EPA推荐的健康风险评价“四步法”,结合暴露参数实测等方法,对太湖流域居民经口途径PAEs健康风险进行科学评估.结果表明:流域各经口介质中除部分蔬菜外,均有PAEs检出,地下水、土壤、主食(水稻、小麦)、蔬菜(生菜、韭菜、茄子、毛豆、山芋藤、木耳菜、长豇豆、苋菜、辣椒、空心菜、黄瓜、南瓜藤)中PAEs所占比例最高的为DNP、DCHP、DBP、DNP;流域人群男性PAEs经口总暴露风险为4.88×10-5,女性PAEs经口总暴露风险为4.29×10-5,其中DEHP的贡献率均最大.男性PAEs经口暴露总健康风险大于女性,男性夏秋季节PAEs经口暴露的健康风险等于春冬季节,女性春冬季节PAEs经口暴露风险大于夏秋季节.流域人群的经口暴露的健康风险均高于英国皇家协会推荐的可接受健康风险水平1×10-6,但低于美国环境保护局推荐的健康风险水平1×10-4.

PAEs health risk assessment of agriculture area in Taihu Lake Basin (Southern Jiangsu Province).

Pollution of the 15 PAEs by oral media including groundwater, soil, crops, in a total number of 346 samples in Taihu Lake Basin (southern Jiangsu) include Wuxi, Changzhou and Zhenjiang City was analyzed. Four-step health risk assessment recommended by US EPA combined with the measured exposure parameters were used to scientifically evaluate Taihu lake basin residents by the oral way PAEs health risks. The results showed that the basin by oral medium except some vegetables had detected PAEs, the higher proportion of PAEs in groundwater, soil, staple food include rice and wheat, vegetables include lettuce, leeks, eggplant, soybean, potato vine, Malabar Spinach, asparagus bean, amaranth, peppers, spinach, cucumber, pumpkin vine were DNP, DCHP, DBP, DNP. PAEs by oral exposure risks was 4.88×10-5 for male, and was 4.29×10-5 for female, and DEHP had maximum contribution rate. Males PAEs exposure by oral health risks was greater than females, in summer and autumn risks of PAEs by oral exposure for male was equal to the spring and winter, in spring and winter risks of PAEs by oral exposure for female was greater than in the summer and autumn. The risk of basin population by oral exposure was higher than the acceptable health risk level of 1×10-6 recommended by the Royal Society, but lower than the acceptable health risk level of 1×10-4 recommended by the U.S. Environmental Protection Agency.