摘要
分析了广东东翼(汕头)、西翼(湛江)和珠江三角洲(东莞、惠州、中山和顺德)等典型区域农业土壤中8种重金属(Cu、Zn、Ni、Cr、Pb、Cd、As和Hg)元素的含量。结果表明,578个农业土壤表层样中,有230个样品的重金属含量超过国家土壤环境质量二级标准值,超标率39.79%,Pb没有超标,Ni超标最严重;果园土比水稻土、菜园土污染严重;不同区域的土壤污染程度是珠江三角洲>东翼(汕头)>西翼(湛江),珠江三角洲的西、北江流域(中山、顺德)土壤重金属污染程度要比东江流域(东莞、惠州)严重。人为因素、成土母质和不同流域水质差异是造成广东典型区域农业土壤重金属污染的原因。
A soil survey was carried out, covering six regions, one in the east part, one in the west part and four in the Pearl River Delta （PRD） for contents of heavy metals （Cu, Zn, Ni, Cr, Pb, Cd, As and Hg） in agricultural soils. Results showed that 39.79% of the 578 soil samples collected from the top layers of the agricultural land in these regions were found to exceed the criteria for respective heavy metals of GradelI of the national standard for environment quality. Ni was the most serious one while Pb the least or still below the criterion. Orchard soils were more polluted than paddy soils and vegetable soils, and the PRD than the east and west of parts of Guangdong, and the Xijiang and Beijiang River valleys （Zhongshan and Shunde） than the Dongiiang River valley （Dongguan and Huizhou） in the PRD. Human activities, soil parent materials and water quality were major causes of the heavy metal pollution of the agricultural lands in these regions.
出处
《土壤》
CAS
CSCD
北大核心
2007年第3期387-392,共6页
Soils
基金
国家环保总局科技项目(2001-1-2)
广东省自然科学基金项目(06025915)资助。
关键词
广东典型区域
农业土壤
重金属
污染
Typical areas of Guangdong Province, Agricultural soil, Heavy metals, Pollution
