成都市龙泉驿汽车配件生产集中区周边农业土壤重金属污染现状调查与评价  

Assessment of Heavy Metal Pollution in Agricultural Soils Around Concentrated Zone for Auto Parts Production in Chengdu Longquanyi

作　　者：陈雅慧 陈宁 陈飞洋 邓凯辉 汪汉驹 Chen Yahui;Chen Ning;Chen Feiyang;Deng Kaihui;Wang Hanju(Faculty of Geography Resource Science,Sichuan Normal University,Chengdu 610101,China)

机构地区：[1]四川师范大学地理与资源科学学院,成都610101

出　　处：《科技通报》2017年第9期232-235,254,共5页Bulletin of Science and Technology

摘　　要：采集成都市龙泉驿汽车配件生产集中区周边表层农业土壤(0~20 cm),测定土壤中Cu、Zn、Ni、Cr、Cd的含量,利用单因子污染指数法、内梅罗综合污染指数法和潜在生态风险指数法对土壤的重金属污染状况进行评价。结果表明,研究区域土壤Cu、Zn、Ni、Cr和Cd的含量分别为23.0 mg/kg(12.43~57.04 mg/kg)、192.99 mg/kg(169.52~206.80 mg/kg)、18.75 mg/kg(9.32~27.40 mg/kg)、30.11 mg/kg(14.07~59.04 mg/kg)、0.55 mg/kg(0.16~1.06 mg/kg),除Cd以外的4种重金属的单项污染指数的平均值均小于1,Cd是研究区表层土壤重金属污染的主要因子。重金属内梅罗综合污染指数均值为1.455,被调查区域土壤属于轻度污染。土壤重金属的潜在生态危害性为Cd>Cu>Zn>Ni>Cr,其中是Cd主要的生态风险贡献因子,研究区域土壤处于轻生态危害水平。The soil was collected from the upper layer agricultural site(0~20cm)around concentratedzone for auto parts production in Chengdu Longquanyi and the concentration of Cu,Zn,Ni,Cr,Cd wasdetermined.The contamination status of the soil was assessment by three methods,including singlefactor pollution indexing,Nemerow pollution indexing and potential ecological risk indexing method.Theresult showed that the concentrations of Cu,Zn,Ni,Cr and Cd in upper layer soil were23.0mg/kg(12.43~57.04mg/kg),192.99mg/kg(169.52~206.80mg/kg),18.75mg/kg(9.32~27.40mg/kg),30.11mg/kg(14.07~59.04mg/kg)and0.55mg/kg(0.16~1.06mg/kg),respectively.The average single factorpollution index of Cu,Zn,Ni and Cr was less than1and the main factor of heavy metal pollution in theupper layer soil of the studied area was Cd.The mean Nemerow pollution index of heavy metal was1.455,and the soil in the area had only a slight pollution.From high to low,the potential ecological riskof heavy metals in the soil was,in order,Cd,Cu,Zn,Ni,Cr.And Cr was the dominating contributionfactor.These findings indicated that the ecological damage of the soil in the investigated area was at amoderate level.

关 键 词：农业土壤 重金属污染 成都龙泉驿 评价 

分 类 号：X53[环境科学与工程—环境工程]