广东鼻咽癌高发区土壤-作物系统重金属迁移特征及健康风险评价

为揭示广东鼻咽癌高发区土壤-作物系统重金属迁移特征及健康风险,选择鼻咽癌高发区四会市农田系统为研究对象,采集了稻谷和油麦菜样品及对应的土壤样品,在分析土壤和农作物样品中As、Cu、Hg、Mn、Ni、Pb和Cd这7种重金属含量及化学形态的基础上,采用统计学分析、污染指数评价法、迁移系数法和健康风险评价法等开展土壤-作物系统重金属的迁移特征及健康风险评价.结果表明,研究区农田土壤基本清洁(P_综=0.43);土壤中Cd和Mn主要以生物可利用态存在,Hg主要以潜在可利用态存在,As、Cu、Ni和Pb主要存在于残渣态中.研究区油麦菜基本安全(P_综=0.48),稻米污染指数(P_综=7.66)高于油麦菜,主要污染元素为Pb (PI=10.25).研究区土壤中Cd和Cu更容易被油麦菜吸收富集,Cd、Cu和As更容易被稻米吸收富集,农田土壤重金属污染防治工作应特别关注Cd和Cu污染,对于稻田应同时关注As的污染.研究区成人和儿童食用油麦菜的非致癌风险指数(HI)均小于1,总致癌危害指数(Risk)均值小于1×10^-4...     

Predicting the effect of promotion measures on waste separation behavior: a case study in Da Nang City,Vietnam

Journal of Material Cycles and Waste Management - Recycling is one of the priority solutions for reducing the amount of waste entering landfills. To achieve high rates of recycling, citizens are...     

PM2.5-bound phthalates and phthalate substitutes in a megacity of southern China: spatioseasonal variations,source apportionment,and risk assessment

Environmental Science and Pollution Research - Plasticizers are ubiquitous pollutants in the environment, whereas few efforts have been made to elucidate their emission sources in the atmosphere....