河北省农田土壤重金属污染情况及影响因素分析  

Farmland soil contamination and causing factor of heavy metal in farmland soil in Hebei Province

作　　者：安玉琴[1] 丛艳丽[1] 张瑞琦[1] 刘毅刚[1] 

机构地区：[1]河北省疾病预防控制中心,石家庄050021

出　　处：《医学动物防制》2016年第12期1302-1305,1309,共5页Journal of Medical Pest Control

基　　金：河北省医学研究重点课题计划指令性课题(20150104)

摘　　要：目的评价分析河北省农田土壤重金属污染情况及影响因素。方法运用分层随机抽样法采集河北省2 700份农田土壤样本,填写调查表;采用标准方法测定样本中铅、镉、铬含量;根据尼梅罗综合污染指数将监测地区分为无污染区、低污染区、高污染区3组进行重金属影响因素统计分析。结果 2 700份土壤样本中铅、镉、铬平均含量依次为:18.52、0.40、39.63㎎/㎏,13.74%的样本镉含量超出国家二级标准,铅、铬含量均未超标;高污染区镉与铬Pearson相关系数高于低污染区和无污染区,高污染区铅与镉Pearson相关系数高于低污染区;土壤性状对镉超标的影响为:无污染区、低污染区、高污染区二分类Logistic回归方程依次为:logit P=-1.02-0.44x_(湿度),logit P=-1.29-0.58x_(pH),logit P=5.96-1.62x_(湿度)-1.22x_(pH)。结论河北省农田土壤存在重金属复合污染,以镉污染为主,p H值是影响农田土壤镉污染的主要因素。Objective To assess and analyse the heavy metals pollution status and influence factor in farmland soil in Hebei Province. Methods Using stratified random sampling method collected samples Hebei 2 700 parts of farmland soil,fill out a survey; the sample was measured using standard methods of lead,cadmium,chromium content; According to Nemerow comprehensive pollution index will monitor the area into pollution- free area,low polluted areas,high pollution 3 factors affecting heavy metal group statistical analysis. Results The average contents of heavy metals were lead（ 18. 52 mg / kg）,cadmium（ 0. 40 mg /kg） and chromium（ 39. 63 mg / kg） respectively in 2 700 samples of farmland soil,so the contents of cadmium in 13. 74% of soil samples exceeded the national secondary standard,while which of chromium and lead in all samples didn,t exceed the national soil secondary standard. The correlation coefficient between cadmium and chromium in high- pollution group were higher than no- pollution and low- pollution groups,while which between lead and chromium in high- pollution group were higher than low-pollution group. The influence of soil properties on cadmium was that： binary classification Logistic regression equation in no-pollution,low- pollution,high- pollution groups were logit P =- 1. 02- 0. 44 x_（humidity）,logit P =- 1. 29- 0. 58 x_（humidity）,logit P= 5. 96- 1. 62x_（humidity）- 1. 22 xp Hrespectively. Conclusion In Hebei Province,the compound pollution of heavy metals in in farmland soil existed,and cadmium was the main contaminant. p H value were the main factors that affected the cadmium pollution in farmland soil.

关 键 词：农田土壤 重金属 含量 影响因素 

分 类 号：R124[医药卫生—环境卫生学]