摘要
通过对黄石市基本农田土壤重金属Cu、Pb、Zn、Cd、Hg的污染调查监测,结合土壤环境质量标准和国家绿色食品发展中心提供的土壤分级标准进行评价。结果表明:整体上黄石市的基本农田土壤受到了轻度污染,其中Pb、Zn元素不存在超标现象,为清洁水平;Cd超标率为8%,Hg超标率为13%,均为轻度污染水平;Cu超标率为40%,综合污染指数为2.07,达到了中度污染水平。Cu、Cd的变异系数在大冶市变异较大,Cu、Hg的变异系数在阳新县较大,说明这三种元素在不同样点间存在较大差异。分析超标的样点分布规律,发现超标的样点主要分布在工矿企业周围的农田。
To evaluate according to the checking of heavy metal Cu, Pb, Zn, Cd and Hg pollution of the soil from basic farmland of Huangshi, and also according to the soil environment quality standard, and the soil grading standards provided by national green food developing center, the result shows that the soil of basic farmland of Huangshi has been polluted lightly, among which the Pb, Zn elements are not over the standard (is the cleanness level) ;The over standard rates of Cd was 8%, The over standard rates of Hg was 13%, the Cd, Hg elements are in the light polluted level ; The over standard rates of Cu was 40%, the Cu element is in the medium polluted level as its pollution index is 2. 07. Changing coefficients of the heavy metal such as Cu, Cd are large in Daye, Changing coefficients of the heavy metal such as Cu, Hg are large in Yangxin, That is to say the three kind of element have polluted in each area in different degrees. Analyzed the distribution of the samples which over standard the distribution, The farmland chosen as samples which over standard are mainly around the industrial and mining companies.
出处
《环境科学与管理》
CAS
2009年第2期80-82,共3页
Environmental Science and Management
基金
黄石理工学院科研项目(项目编号:Z2006YB04)
关键词
基本农田
土壤
重金属
评价
basic farmland
soil
heavy metal
evaluation