摘要
为考察东平湖湖区农田土壤的重金属污染状况,为农业活动和东平湖的水质安全提供支持,2014年在湖区农田中采集15个土壤样品,测定其中Pb、Cr、Cd、As和Hg 5种重金属的浓度,采用综合污染指数、地累积指数和潜在生态风险指数评价土壤的重金属污染状况,并用surfer软件对农田土壤的生态风险进行分区。结果表明:农田土壤中5种重金属的浓度基本都满足土壤环境质量标准的I^II类,主要富集物质为Hg,富集系数为2.50;综合污染指数为0.41,污染级别为1级;地累积指数为-1.23~2.63,污染级别为1~4级;潜在生态风险总指数为168,表明土壤具有中度的生态危害;分区结果显示湖区东北部的生态危害相对较重,需要进行进一步的污染源调查处置。
Aimed at guaranteeing the safety of agricultural activities and water quality in Dongping Lake,we collected 15 soil samples from farmland soils around Dongping Lake in 2014,and investigated the heavy metal pollution. In this study,we analyzed concentrations of Pb,Cr,Cd,As and Hg,and used methods of comprehensive pollution index,geoaccumulation index and potential ecological risk index to evaluate the heavy metal pollution, finally applied surfer software to provide ecological risk partitions for the soil. Results showed that the concentrations of five heavy metals in soil were basically up to standard I ~ II class of soil environmental quality; Major enrichment matter was Hg with 2. 50 of coefficient; Comprehensive pollution index was 0. 41 at level 1 of pollution; Cumulative index was-1. 23 ~ 2. 63 at level 1 ~ 4 of pollution; Potential ecological risk index was 168 with a moderate ecological risk of the soil. Therefore,partition results showed that the ecological risk in northeast area of the lake was relatively heavy,which required a further investigation and disposal.
出处
《土壤与作物》
2017年第4期283-290,共8页
Soils and Crops
基金
山东省地矿局地质科技攻关项目(KY201516)
山东省物化探勘查院科研基金(鲁物科基字[2015]1号)
关键词
东平湖
土壤
重金属
生态风险
Dongping Lake
soil
heavy metal
ecological risk
作者简介
第一作者及通讯作者简介：胡尊芳（1986-），女，山东临沭人，博士，工程师，主要研究方向为土壤污染研究．
