摘要
以六盘水市居民区、商业区、公园、学校、道路5个功能区的表层土壤为研究对象,采用单因子指数法、内梅罗综合指数法和潜在生态危害指数法对土壤重金属Cu、As、Cd、Hg的污染特征及生态风险进行评价。测试的4种重金属平均含量均超过贵州省土壤背景值;单因子指数法评价表明,重金属的平均污染趋势表现为Cd>As>Hg>Cu,不同功能区土壤的综合污染程度为:公园>学校>商业区>居民区>道路; Cd、Hg是主要的潜在生态风险因子,多种重金属综合潜在生态风险指数RI范围为156.76～320.26,均值为234.76,土壤整体为中等生态风险,不同功能区的综合潜在生态风险指数RI依次为学校>公园>商业区>居民区>道路。
Take the residential areas,commercial districts,park areas,school districts,road zones of urban soil in five different functional zones of Liupanshui City as the study target,using the single factor index method,Nemerow comprehensive index method and Hakanson potential ecological risk index to evaluate the environmental quality of soil heavy metals Cu、As、Cd、Hg and ecological hazards.The average contents of four tested heavy metals exceeded the Guizhou province soil background.The single factor index method showed that the pollution trend were Cd>As>Hg>Cu,the comprehensive pollution index in different functional zones indicated park areas>school districts>commercial districts>residential areas>road zones;Cd and Hg were main factors for potential ecological hazard of all the heavy metal elements,the range of the synthetical potential ecological hazards of several heavy metals was 156.76~320.26,the mean value was 234.76,and the overall soil reached medium ecological risk,the RI in different functional zones was school districts>park areas>commercial districts>residential areas>road zones.
作者
仝双梅
连国奇
杨琴
秦趣
代稳
Tong Shuangmei;Lian Guoqi;Yang Qin;Qin Qu;Dai Wen(College of Tourism and Cultural History,Liupanshui Normal University,Liupanshui 553004,China;College of Chemical and Material Engineering,Liupanshui Normal University,Liupanshui 553004,China)
出处
《山东化工》
CAS
2019年第8期225-228,共4页
Shandong Chemical Industry
基金
贵州省科学技术基金项目(黔科合J字LKLS[2013]17号)
贵州省教育厅创新群体重大研究项目(黔教合KY字[2016]056号)
六盘水师范学院创新团队基金(LPSSYKJTD201604
LPSSYKJTD201701)
六盘水师范学院科研计划项目(lpssy201114
lpssy201210
lpssy201207)联合资助
关键词
六盘水市
功能区
土壤重金属污染
评价
Liupanshui City
functional districts
soil metal pollution
evaluation
