中国农业科学2017，Vol.50Issue(21)：4149-4158,10.DOI:10.3864/j.issn.0578-1752.2017.21.009
典型设施蔬菜基地重金属的累积特征及风险评估
Accumulation Characteristics and Risk Assessment of Heavy Metals in Typical Greenhouse Vegetable Bases
摘要
Abstract
[Objective] The objective of this paper is to study accumulation characteristics and health risk of heavy metals in greenhouse vegetable base of Beijing,to determine the migration rule of heavy metals from soil to vegetable,and to provide reference basis for vegetable quality safety and optimization of vegetable structure in Beijing.[Method] 148 soil samples and 96 vegetable samples were collected from 9 typical greenhouse vegetable bases in Beijing,the statistical characteristics of As,Cd,Cr,Hg and Pb in soil and vegetable samples and their transfer factors from soil to vegetable system were analyzed.Combined with the EPA (US) recommended health risk assessment model,the health risks of adults and children as a result of vegetable intake were evaluated.[Result] The mean concentrations of As,Cd,Cr,Hg and Pb in soils were 9.43,0.18,64.4,0.11 and 21.6 mg·kg-1,respectively.The mean concentrations of As,Cd,Cr,Hg and Pb in vegetables were 0.0478,0.0391,0.2785,0.0014 and 0.0454 mg·kg-1,respectively.On the whole,the migration ability of heavy metals in greenhouse vegetable bases were decreased in the order of Cd＞ Hg ＞ Cr＞ As ＞ Pb.Target hazard quotients caused by heavy metals were decreased in the order of Cd＞Pb＞ Hg＞As＞ Cr.The target hazard quotient of single heavy metal in all vegetable samples was less than 1,which indicated that there was no obvious negative effect of single heavy metal.[Conclusion] The accumulation of heavy metals (As,Cd,Cr and Hg) in the soil samples from the greenhouse vegetable bases were found,health risks should be emphasized.关键词
土壤/设施蔬菜/重金属/健康风险Key words
soil/greenhouse vegetable/heavy metal/health risk引用本文复制引用
徐笠,陆安祥,田晓琴,何洪巨,殷敬伟..典型设施蔬菜基地重金属的累积特征及风险评估[J].中国农业科学,2017,50(21):4149-4158,10.基金项目
国家公益性行业(农业)科研专项(201403014-04)、北京市农林科学院青年基金(QNJJ201717)、质标中心开放课题(kfkt201706) （农业）
