摘要
通过随机采集苏中地区43组农田土壤和小麦籽粒样本,测定其中Cu、Zn、Pb、Cd含量,分析小麦籽粒的重金属富集能力及其影响因素,并评估食用本地产小麦的健康风险。结果表明:研究区土壤样品中Cd超标率为14.0%;小麦籽粒样品中Cd、Pb超标率分别为4.65%、27.9%。小麦籽粒对重金属富集能力强弱依次为Zn>Cd>Cu>Pb,且其对Cd的富集能力与土壤p H值呈显著负相关(P<0.01,r=-0.41),需关注土壤酸化对小麦籽粒Cd富集的影响。不同暴露人群食用本地产小麦风险系数(HQ)和风险指数(HI)均在可接受水平内,若考虑其他暴露途径,仍有可能危害当地居民健康。
In this study, 43 pairs of agricultural topsoil and wheat grain samples were collected from the central region of Jiangsu for determining the concentrations of Cu, Zn,Pb and Cd, analyzing the wheat grain’s enrichment abilities to the four heavy metals and the its influence factors, and estimating the potential health risks. The results showed that 14. 0% of Cd samples in the researched area exceeded the national standard. The over-standard rate of Cd and Pb in wheat grain samples were 4.65% and 27. 9% . Heavy metal enrichment abili-ty of wheat gains decreased in the order of Zn 〉 Cd 〉 Cu 〉 Pb, and Cd enrichment ability had significant negative correlation with the pH of soil （P 〈0.01,r = -0.41）. Therefore, more attention should be paid to the the prob-lem of Cd in wheat gains that caused by soil acidification. Both hazard quotients （HQ） and hazard index （ HI） to different exposure people were within the safety range. However, there still has been harm to the exposure people＇s health considering other exposure ways.
出处
《环境监测管理与技术》
CSCD
2017年第1期35-38,56,共5页
The Administration and Technique of Environmental Monitoring
基金
江苏省环保科研课题"江苏省农业用地土壤环境质量标准研究"基金资助项目(201264)
关键词
重金属
小麦
污染状况
健康风险
苏中地区
Heavy metals
Wheat
Pollution situation
Health risk
The central region of Jiangsu
