河南农业科学Issue(3)：71-76,6.DOI:10.15933/j.cnki.1004-3268.2015.03.017
武陟县农田土壤重金属污染评价
Pollution Assessment of Heavy Metal Elements in Farmland Soil in Wuzhi County
摘要
Abstract
Surface soil samples collected from farmland in Wuzhi county were used to analyze the contents of Cr,Ni,Cu,As and Pb,and the quality of soil was assessed by single factor pollution index method,com-prehensive pollution index method and the potential ecological risk index method. The results showed that the contents of Cr,Ni,Cu,As and Pb in the soil were 70. 53,33. 65,31. 95,16. 74,22. 04 mg/kg,respec-tively. Single factor pollution index of Cr,Ni,Cu and Pb were smaller than one, only 21. 28% of the soil samples could not meet the requirement of national standard in terms of As content,and the single factor pollution index was less than two. However,single factor pollution index of As was smaller than 2. The comprehensive pollution index was 0. 65,indicating that the soils had not been polluted, was safe. Com-prehensive pollution index of dry land was smaller than that of paddy field,showing that the pollution sta-tus of paddy field was more serious than that of dry land. The comprehensive potential ecological risk in-dex was 36. 97,which showed potential ecological risk induced by these heavy metal elements to the soil system was low. The most significant contributor was identified to be As, the contribution rate of As was 39. 8% to the potential ecological risk. There were significantly positive relations between Cr content and Ni,Cu,As content, between Ni content and Cu content, between Cu content and As content, indicating there was combined pollution or same pollution source among the five metal elements.关键词
农田土壤/重金属/污染/生态风险Key words
farmland soil/heavy metal element/pollution/ecological risk分类
资源环境引用本文复制引用
麻冰涓,高彩玲,王海邻,李小超,张永慧,刘军..武陟县农田土壤重金属污染评价[J].河南农业科学,2015,(3):71-76,6.基金项目
国家自然科学基金项目(21177035,21377035) （21177035,21377035）
河南理工大学青年基金项目(Q2013-05A) （Q2013-05A）
