进口再生塑料颗粒重金属浸出特征及健康风险评价  

Heavy metals leaching characteristics and health risk assessment of imported recycled plastic particles

作　　者：程凌云 孟棒棒 岳波[1] 张颖[1,2] 林晔 CHENG Lingyun;MENG Bangbang;YUE Bo;ZHANG Ying;LIN Ye(Research Institute of Solid Waste Management,Chinese Research Academy of Environmental Sciences,Beijing Beijing 100012,China;School of Municipal and Environmental Engineering,Shenyang Jianzhu University,Shenyang 110168,China)

机构地区：[1]中国环境科学研究院固体废物污染控制技术研究所,北京100012 [2]沈阳建筑大学市政与环境工程学院,沈阳110168

出　　处：《环境工程学报》2023年第11期3670-3680,共11页Chinese Journal of Environmental Engineering

基　　金：国家重点研发计划资助项目(2019YFC1904802)。

摘　　要：为了评价进口再生塑料颗粒中主要重金属经口摄入的潜在健康风险,选取了5类典型进口再生塑料颗粒,基于美国环保署(US EPA)人体健康风险评估框架,通过检测其在食物模拟液中Hg、Pb、Cr、Cd、Mn和Cu的浸出浓度,对其饮食摄入途径下的致癌/非致癌风险进行量化评价,并采用靶器官毒性剂量(TTD)法对非致癌风险指数进行修正。结果表明,参照我国饮用水标准,Hg、Pb、Cr、Cd和Mn浸出浓度超标倍数分别高达1243.04、50.06、38.27、3.27和2.96倍,而Cu未超标,总体上存在严重健康风险。致癌风险结果显示,在所有模拟场景下,5种进口再生塑料颗粒中重金属致癌风险指数平均超过可能致癌水平上限70.28倍。非致癌风险结果显示,在所有模拟场景下,5种进口再生塑料颗粒中重金属传统非致癌风险指数和靶器官毒性剂量修正的非致癌风险指数分别平均超过最高上限15.26倍和23.71倍,其中肠胃道、血液、肾脏和神经系统存在不可接受非致癌风险,睾丸、心血管和肝脏不存在非致癌风险。这表明进口再生塑料颗粒所带来潜在健康风险仍需持续关注。To assess the potential health risks of major heavy metals from orally ingested imported recycled plastic particles,five typical imported pellets of recycled plastic were selected.Based on the US Environmental Protection Agency(US EPA)human health risk assessment framework,the leaching concentrations of Hg,Pb,Cr,Cd,Mn,and Cu in food simulant liquids were measured to quantitatively evaluate the carcinogenic/noncarcinogenic risks under dietary exposure pathways.The Target Organ Toxicity Dose(TTD)method was used to adjust the non-carcinogenic risk index.The results showed that compared to the drinking water standards in China,the exceedance multiples of leaching concentrations for Hg,Pb,Cr,Cd,and Mn were as high as1243.04、50.06、38.27、3.27 and 2.96 times,respectively,while Cu was within the limits.Overall,there were significant health risks.The carcinogenic risk results indicated that the average carcinogenic risk indices of heavy metals in the five imported pellets of recycled plastic exceeded the highest upper limit by 70.28 times in all simulation scenarios.The non-carcinogenic risk results showed that the average traditional non-carcinogenic risk indices and TTD non-carcinogenic risk indices in all simulation scenarios exceeded the highest upper limit by 15.26 and 23.71 times,respectively.Unacceptable non-carcinogenic risks were observed in the gastrointestinal tract,blood,kidneys,and nervous system,while no non-carcinogenic risks were found in the testes,cardiovascular system,and liver.This indicates that continuous attention should be paid to the potential health risks posed by imported recycled plastic particles.

关 键 词：进口再生塑料颗粒 经口暴露 健康风险评估 重金属 

分 类 号：X705[环境科学与工程—环境工程] X798