摘要
为了解滨海中心区绿地重金属含量分布、污染评价及潜在生态风险,以滨海中心区117件绿地土壤样品为基础,对土壤中8项重金属(Cr、Ni、Cu、Zn、Pb、As、Hg、Cd)及pH进行测定,应用对比分析、地统计分析、污染载荷法和改进Hankanson生态风险指数法进行探讨,结果表明:绿地土壤重金属元素虽未超过Ⅱ级筛选值,但存在一定程度集聚现象。Cr、Ni、Cu、Zn、Pb和Cd浓度高值区东南部>中部>西北部;Hg浓度高值区中部大于东南部和西北部地区;As浓度高值点在全区均有分布,主要高值区位于东南部。潜在生态风险评价表明,研究区为中等生态风险,Hg和Cd为主要贡献因素,强烈生态风险点和很强生态风险点主要分布在研究区东南部,通往天津港交通线附近一带。
In order to investigate the distribution,pollution assessment,and potential ecological risks of heavy metals in the green spaces of the Binhai Central District,117 soil samples from these areas were analyzed.The concentrations of eight heavy metals(Cr,Ni,Cu,Zn,Pb,As,Hg,Cd)and pH levels were measured.Using comparative analysis,geostatistical analysis,pollution load index,and the improved Hankanson ecological risk index,the study revealed the following results:Although the heavy metal concentrations in the green space soils did not exceed the Level II screening values,there was a certain degree of accumulation.The concentration of Cr,Ni,Cu,Zn,Pb,and Cd was highest in the southeast,followed by the central region,and then the northwest.Hg concentration was highest in the central region,greater than that in the southeast and northwest areas.High concentrations of As were distributed throughout the region,with the primary high-value area located in the southeast.The potential ecological risk assessment indicated that the study area is at moderate ecological risk,with Hg and Cd being the main contributing factors.Points of strong and very strong ecological risk are mainly located in the southeastern part of the study area,near the transportation routes leading to Tianjin Port.
作者
李硕
侯建涛
高洪生
吴瑾
马武明
Li Shuo;Hou Jiantao;Gao Hongsheng;Wu Jin;Ma Wuming(Tianjin Institute of Geological Survey,Tianjin 300191,China;Tianjin Monitoring Central Station of Geological Environment,Tianjin 300191,China)
出处
《环境科学与管理》
2025年第7期178-182,共5页
Environmental Science and Management
基金
“京津冀一体化协同发展区地质保障工程”(津地调[2016]05001-01-15)资助。
关键词
绿地
重金属
环境评价
生态风险
green space
heavy metal
environmental assessment
ecological risk
