摘要
以洛阳市露地蔬菜基地土壤及蔬菜为研究对象,采用原子吸收分光光度法分别对样品中重金属(Cr、Pb、Cd、Hg)含量进行测定,以单因子污染指数和综合污染指数为评价方法分析土壤的污染状况和蔬菜的质量。结果表明:洛阳市露地蔬菜基地土壤中重金属除Cd、Hg外,Cr、Pb的含量均未超过GB15618—1995《土壤环境质量标准》二级标准限值;洛龙区和伊川县蔬菜基地土壤已受到重金属污染,含量超过国家食品卫生蔬菜类标准;蔬菜的主要污染元素是Pb,油菜、生菜中Pb含量超标,叶菜类重金属含量平均值超标,说明叶菜类受到Pb污染的威胁更大,而根茎类蔬菜受污染程度较小,处于安全水平。
Soil and vegetables from Luoyang vegetable base were used as the subjects to determine the contents of heavy metal ions such as Cr,Pb,Cd and Hg by atomic absorption spectrometry.The pollution status of soil and the quality of vegetables were evaluated by single factor pollution index and comprehensive pollution index.Results showed that the contents of Cr and Pb did not exceed the second-level limit of ＂ Standard of Soil Environment＂ （GB 15618—1995）.However,Luolong and Yichuan vegetables base were polluted by heavy metals according to the national vegetable food criteria.The key pollution factor was Pb with an exceeding rate of 36.3%.The highest content of lead was determined in leafy vegetables such as leaf lettuce.The lower pollution of lead was determined in root and stem vegetables,which was remained at the safe level.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2010年第21期369-372,共4页
Food Science
基金
国家自然科学基金项目(30872009)
河南科技大学博士启动基金项目(09001447)
关键词
蔬菜
土壤
重金属
污染
vegetable
soil
heavy metal
pollution
