黄石市基本农田水稻中重金属污染评价分析

对黄石市基本农田稻米中重金属含量进行了分析测定并进行相应的分析评价,以明确该地区稻米中的重金属污染情况。结果表明：基本农田稻米整体上已经受到了Pb污染,大冶市和阳新县的稻米均为重度Pb污染（污染指数分别为5.469和3.689）,未受到其他重金属污染（其他重金属的污染指数均小于1）;分析不同样点的污染情况,62%的样点为重污染水平,18%的样点为中污染水平,16%的样点为轻污染水平,其他为清洁水平;分析污染原因可能主要由废水浇灌以及大气重金属尘沉降等引起。

Analysis of Heavy Metal Pollution Evaluation of Basic Farmland Rice in Huangshi

Contents of heavy metals of basic farmland rice in Huangshi were analyzed and determined and corresponding analysis and evaluation were made in order to identify heavy metals pollution of the rice in this area.The results indicates that basic farmland rice as a whole has already been contaminated by Pb,rice in Yangxin County and Daye was severely polluted by Pb（pollution index was 5.469 and 3.689 separately）,but not affected by other heavy metals（pollution index of other heavy metals was less than 1）;pollution of different sampling sites has been analyzed and the results show that 62% of the sample cites have been affected by serious pollution,18% by medium pollution and 16% by light pollution,the others have been at clean level.The major causes of pollution are the result of the application of fertilizers and pesticides,waste-water irrigation in large quantities as well as atmospheric sedimentation of heavy metals and so on.