摘要
为了解山东省德州市德城区建设用地土壤重金属污染现状以及潜在生态风险,以山东省德州市德城区典型建设用地为研究对象,选取区域内24个表层土壤样本并对其中7种重金属元素(Cd、Hg、As、Cu、Pb、Zn、Ni)进行分析测定。综合运用描述性统计、相关分析、R型聚类分析对其来源以及相关性进行识别。同时,论文选用单因子指数法、内梅罗综合污染指数法、地累积指数、潜在生态风险评价对其生态风险进行分析评估。结果表明:全部采样点的土壤重金属含量平均值在一类建设用地土壤污染风险筛选值之内,但明显超出山东省土壤背景值;Cd和Pb之间存在高相关性,指示着受外界干扰程度较大;研究区内As贡献率最高,为65.26%。但内梅罗综合污染指数和潜在生态风险分析表明区域整体环境质量良好,对人类健康无威胁,无需采取管控手段。德州市德城区建设用地污染的治理工作成效显著,未来可对As集中区展开调查以期查明污染源,为进一步实现经济与环境齐头发展打下基础。
In order to understand the heavy metal pollution status and potential ecological risks in the soil of Decheng District,Dezhou City,Shandong Province,taking the typical construction land of Decheng District,Dezhou City,Shandong Province as the research object,24 surface soil samples were selected and 7 heavy metal elements (CD,Hg,As,Cu,Pb,Zn,Ni) were analyzed and determined.Comprehensive use of descriptive statistics,correlation analysis,R-cluster analysis to identify the source and correlation.At the same time,the paper uses single factor index method,Nemero comprehensive pollution index method,geo accumulation index and potential ecological risk assessment to analyze and evaluate its ecological risk.The results showed that the average content of heavy metals in soil of all sampling sites was within the screening value of soil pollution risk of construction land,but significantly exceeded the soil background value of Shandong Province;There is a high correlation between Cd and Pb,indicating a large degree of external interference;The contribution rate of as in the study area is the highest,65.26%.However,the Nemero comprehensive pollution index and potential ecological risk analysis show that the overall environmental quality of the region is good,there is no threat to human health,and there is no need to take control measures.The pollution control of construction land in Decheng District of Dezhou City has achieved remarkable results.In the future,the as concentration area can be investigated in order to find out the pollution source and lay a foundation for further economic and environmental development.
作者
刘佳炜
Liu Jiawei(Shihezi University,Xinjiang,832061)
出处
《当代化工研究》
2022年第12期35-39,共5页
Modern Chemical Research
关键词
土壤污染
重金属
建设用地
潜在生态风险评价
soil pollution
heavy metals
construction land
potential ecological risk assessment
