九龙江流域稻米重金属生物可给性及食用健康风险  

Bioaccessibility of heavy metals and dietary safety of the rice produced in Jiulong River Basin

作　　者：胡宇楠 林承奇 黄华斌 HU Yunan;LIN Chengqi;HUANG Huabin(College of Environmental Science and Engineering,Ocean University of China,Qingdao,266100,China;College of Environment and Public Health,Xiamen Huaxia University,Xiamen,361024,China;Key Laboratory of Fujian Universities for Environmental Monitoring,Xiamen,361024,China;Xiamen Environmental Monitoring Engineering Technology Research Center,Xiamen,361024,China)

机构地区：[1]中国海洋大学环境科学与工程学院,青岛266100 [2]厦门华厦学院环境与公共健康学院,厦门361024 [3]环境监测福建省高校重点实验室,厦门361024 [4]厦门市环境监测工程技术研究中心,厦门361024

出　　处：《环境化学》2022年第7期2211-2220,共10页Environmental Chemistry

基　　金：福建省中青年教师教育科研项目(JAT200871);福建省水产功能性饲料及养殖环境调控重点实验室开放基金(FACE20200007);环境监测福建省高校重点实验室开放研究课题(HJJC2006)资助。

摘　　要：为研究九龙江流域稻米中重金属的生物可给性及其食用健康风险,运用生理原理提取法(PBET)分析了稻米中模拟胃阶段和肠阶段可提取的重金属含量。运用基于生物可给性的健康风险评价模型评估重金属对人体的致癌风险和非致癌风险。结果表明,九龙江流域稻米中不同重金属的生物可给性差异较大。稻米中Ni、Zn、Cd和Pb在胃阶段的平均生物可给性高于肠阶段;而稻米中Cr、Cu、As和Hg在胃阶段的平均生物可给性低于肠阶段。稻米重金属在胃阶段和肠阶段均对人体存在非致癌风险和致癌风险,其中非致癌风险主要由As和Cd贡献;致癌风险主要由Cd和Ni贡献。稻米重金属对儿童的非致癌风险高于成人,而致癌风险低于成人。稻米重金属在胃阶段的非致癌风险低于肠阶段,而致癌风险高于肠阶段。稻米重金属的健康风险在九龙江流域的中上游区域较高。In order to research the bioaccessibility of heavy metals and dietary health risks of the rice produced in the Jiulong River Basin,the extractable rice heavy metals in the simulated gastric phase and intestinal phase were analyzed using the Physiologically Based Extraction Test(PBET)method.A bioaccessibility-based health risk evaluation model was applied to evaluate the carcinogenic and non-carcinogenic risks of heavy metals to humans.The results showed that the bioaccessibility of different heavy metals in the rice produced in Jiulong River Basin was significantly different.The average bioaccessibility of Ni,Zn,Cd and Pb in the rice was higher in the gastric phase than in the intestinal phase,while the average bioaccessibility of Cr,Cu,As and Hg in the rice was lower in the gastric phase than in the intestinal phase.There were non-carcinogenic risk and carcinogenic risk of rice heavy metals in both gastric phase and intestinal phase,with the non-carcinogenic risk mainly contributed by As and Cd and the carcinogenic risk mainly contributed by Cd and Ni.The non-carcinogenic risk of the rice heavy metals to children was higher than that to adults,while the carcinogenic risk of the rice heavy metals to children was lower than that to adults.The non-carcinogenic risk of the rice heavy metals in the gastric phase was lower than that in the intestinal phase,while the carcinogenic risk of the rice heavy metals in the gastric phase was higher than that in the intestinal phase.The health risks of the rice heavy metals were higher in the middle and upper regions of the Jiulong River Basin.

关 键 词：重金属 生物可给性 稻米 健康风险 九龙江流域 

分 类 号：X56[环境科学与工程—环境工程] X820.4