郑州农区土壤重金属污染与蔬菜质量相关性探析

Correlation between the heavy metal pollution in soil and quality of vegetable in farming district of Zhengzhou

  • 摘要: 以单因子污染指数和综合污染指数为评价方法,对郑州市郊区3 种不同灌溉方式农田土壤进行重金属(Hg 、Cr 、Cd 、Pb 、As 、Cu 、Zn)污染监测和蔬菜质量调查。结果发现,郑州市郊区的土壤均未超过GB15618 — 1995枟土壤环境质量标准枠二级标准限值;部分蔬菜已受到重金属的污染,含量超过国家食品卫生蔬菜类标准;土壤中的Zn 、Cu 、Cd 、Cr 污染与多数蔬菜的污染呈显著的正相关,而Pb 、Hg 污染在多数蔬菜中均表现为与土壤污染无相关性。

     

    Abstract: The singlefactor pollution index and the comprehensive pollution index were adopted to investigate the heavymetals(Hg 、Cr 、Cd 、Pb 、As 、Cu 、Zn)pollution of 3 different irrigated soils and quality of vegetables growing in them inZhengzhou suburb . The results show that the soil environment in Zhengzhou suburb is qualified for the second level criterion of “Standard of Soil Environment” (GB15618 — 1995) . But some vegetables have been polluted seriously by heavymetals according to the national vegetable food criterion . The pollution of Zn , Cr , Cu , Cd in soil shows a significantlypositive correlation with the pollution of most vegetables . And Pb , Hg pollution has not presented a correlation betweenthe pollution of most vegetables and soil contamination .

     

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