摘要
为研究海南省某萤石矿区周边农田土壤中重金属Pb、Zn空间分布特征及污染情况,运用单因子污染指数、地累积指数、潜在生态风险指数3种方法进行土壤污染评价,结果显示:该区域内土壤中Pb和Zn平均含量分别为58.99、40.04 mg·kg^(-1),Pb含量均值高于土壤背景值,35.29%点位超过筛选值;Zn含量均值土壤低于背景值和筛选值。在水平方向和垂直方向上Pb和Zn可能受农业活动影响。相关性分析表明,土壤中重金属Pb、Zn含量之间为弱相关性,可能受自然或者人为活动影响。单因子污染指数评价结果显示,Pb为轻微污染,Zn点位均未受污染。地累积指数评价结果显示,Pb为轻度污染,Zn无污染点位。潜在生态风险评价表明,重金属Pb、Zn为低生态风险。
In order to study the spatial distribution characteristics and pollution of heavy metals Pb and Zn in farmland soil around a fluorite mining area in Hainan Province,Using three methods:single factor pollution index,land accumulation index,and potential ecological risk index to evaluate soil pollution.The results showed that the average content of Pb and Zn in the soil in this area was 58.99 mg·kg^(-1) and 40.04 mg·kg^(-1),respectively.The average content of Pb was higher than the soil background value,and 35.29%of the sites exceeded the screening value;The average Zn content in soil is lower than the background value and screening value.Pb and Zn may be affected by agricultural activities in both the horizontal and vertical directions.Correlation analysis shows that there is a weak correlation between the contents of heavy metals Pb and Zn in soil,which may be affected by natural or human activities.The single factor pollution index evaluation results show that Pb is slightly polluted and Zn sites are not contaminated.The evaluation result of the ground accumulation index shows that Pb is slightly polluted and Zn is not polluted.The potential ecological risk index indicates that the potential ecological risk of heavy metals in soil is low.
作者
郑芳芳
袁建平
傅大恺
Zheng Fangfang;Yuan Jianping;Fu Dakai(Hainan Eco-Environmental Monitoring Center,Haikou 571126;College of Geography and Environment,Hainan Normal University,Haikou 571158,China)
出处
《广东化工》
CAS
2023年第18期140-143,共4页
Guangdong Chemical Industry
关键词
土壤
重金属
单因子污染指数
地累积指数
潜在生态风险评价
soil
heavy metal
single factor index
geoaccumulation index
evaluation of potential ecological risk
