摘要
通过对广州城区各居民菜场主要蔬菜进行采样,分析其中的Pb,Cd,Cr,Ni,Cu,Zn重金属含量水平,结果显示,Pb、Cr、Cd为广州市蔬菜的主要污染元素,其超标率分别达到22.2%、38.9%和13.9%。根茎类蔬菜的污染程度大于叶菜类和瓜果类。利用单因子污染指数法进行了评价,发现广州市蔬菜的污染比例在50%以上,其中28.9%为轻度污染。Cr与Zn、Cu之间存在极显著相关性,Cu、Zn之间存在显著相关性。
Vegetable samples were taken from the major vegetable market of Guangzhou,and analyzed for heavy metal contents of Pb,Cd,Cr,Ni,Cu,and Zn.Results showed that Pb、Cr、Cd were the major heavy metal contaminants of vegetables in Guangzhou,with 22.2%,38.9% and 13.9% of tested samples above the standard respectively.Rhizome vegetables exhibited higher degree of contamination than leaf vegetables and melons.Single-factor contaminant index was utilized for assessment.It was found that over 50% vegetables in Guangzhou were contaminated,of which 28.9% were classified as slightly contaminated.Significant correlation was observed between Cr and Zn、Cu at p=0.01 level.Cu and Zn was significant correlated at p=0.05 level.
出处
《广东轻工职业技术学院学报》
2010年第4期17-21,共5页
Journal of Guangdong Industry Polytechnic
关键词
蔬菜
重金属
调查
vegetable
heavy metal
investigation
