摘要
以豫北某市主城区周边土壤为研究区域,系统采集了123个表层土壤样品,分析测试了8种重金属元素的含量,综合运用多元统计分析法,探讨了土壤重金属来源及各元素的相关性,并利用潜在生态风险指数法对土壤重金属生态风险进行了评价。结果表明:(1)研究区域除Hg和As外,其余6种重金属含量平均值超过河南省土壤背景值,存在不同程度的富集现象,但均低于农用地污染风险筛选值。(2)Cu、Zn、Cr和Ni主要受成土母质的影响;Pb、Hg和As受人类活动的影响,主要来源于交通业和工业;Cd来源也是人为活动,但主要受农业施肥活动的影响。(3)研究区综合潜在生态风险指数的平均值为228.6,属于中等生态风险水平。
The soil around a city in North Henan was studied.123 surface soil samples were taken,and the contents of 8 heavy metal elements were tested.The correlations among these heavy metals were studied by multivariate analysis,and the potential sources of the metals were identified.The environmental risk of the metals was evaluated by the potential ecological risk index method.The results showed that:(1)Except Hg and As,the average contents of the other six heavy metals in the study area are higher than the soil background values of Henan Province,and there is enrichment phenomenon in different degrees,but they are all lower than the risk screening values of agricultural land pollution.(2)Cu,Zn,Cr and Ni are mainly affected by parent materials of soil formation.Pb,Hg and As are affected by human activities and mainly come from transportation and industry.The source of Cd is also human activities,but mainly affected by agricultural fertilization activities.(3)The average value of the comprehensive potential ecological risk index in the study area is 228.6,which belongs to the medium level of ecological risk.
作者
宋盈
陈利粉
杜惠文
SONG Ying;CHEN Li-fen;DU Hui-wen(Henan Anyang Ecological Environmental Monitoring Center,Anyang 455000,China)
出处
《江西农业学报》
CAS
2022年第7期130-135,149,共7页
Acta Agriculturae Jiangxi
关键词
土壤
重金属
空间主成分
潜在风险
Soil
Heavy metal
Spatial principal component
Ecological risk
