南昌市郊蔬菜基地土壤重金属含量及评价

Content and Evaluation of Heavy Metal in Soil of Vegetable Growth Base in Nanchang Suburb

调查分析结果表明,南昌市郊杨子洲乡蔬菜生产基地土壤重金属平均含量分别为Cu 33.86 mg/kg、Zn 111.85 mg/kg、Cd 0.24mg/kg、Pb 52.51 mg/kg、Cr 55.26 mg/kg、Ni 20.24 mg/kg。该区土壤中的6种元素都高于土壤背景值,部分土壤已受到Cd的轻度污染,部分土壤Cu、Zn为警戒级,其他元素为安全级。综合污染指数顺序为:Cd>Cu>Zn>Ni>Cr>Pb。

The results of the investigation and analysis on the soil samples collected from the Yangzizhou vegetable base in Nanchang showed that the content of heavy metals in the soil were as follows：Cu 33.86 mg/kg,Zn 111.85 mg/kg,Cd 0.24 mg/kg,Pb 52.51 mg/kg,Cr 55.26 mg/kg and Ni 20.24 mg/kg.The average content of these heavy metals in the soil exceeded the background value.Part of the soil had been slightly contaminated with Cd.Pollution of Zn and Cu was at warning-grade, while others were at safe-grade. The order of integrated containation index was Cd 〉 Cu 〉 Zn 〉 Ni 〉 Cr 〉 Pb.