摘要
为了评估青岛市某垃圾处理园区附近土壤重金属的分布特征及污染风险,采集了垃圾处理园区附近的剖面土壤样品,分析了土壤中重金属元素Cr、Cu、Ni、Pb、Zn、As、Cd和Hg的含量。结果表明,垃圾处理园区附近的0—200 cm深度的土壤中Cr、Cu、Ni、Zn、As重金属含量高于该区域相应的背景值,存在相应的重金属富集现象。由于垃圾处理园区存在向该区域土壤中输入重金属的多种叠加路径,重金属含量在不同点位的土壤剖面上呈现差异性的垂向分布特征。相关性和主成分分析结果表明,土壤中Cr、Cu、Ni、Pb、Zn和As的富集受人类活动影响,而Cd和Hg的来源主要受制于自然因素。各重金属的潜在污染指数大小排序为:Hg>Cd>As>Ni>Cu>Pb>Cr>Zn,综合生态风险指数(RI)均小于150,属于低风险。本研究为判定垃圾处理园区对周边土壤的影响路径以及辅助进行后续的管理提供了依据。
To assess the pollution characteristics and potential risks of heavy metal in the soil around an integrated waste management facility in Qingdao,profile soil samples were collected near the integrated waste management facility and concentrations of Cr,Cu,Ni,Pb,Zn,As,Cd and Hg were determined.The results revealed that the concentrations of heavy metals(Cr,Cu,Ni,Zn and As)in the soil with a depth of 0—200 cm near the integrated waste management facility were higher than the corresponding background values.Differences in the vertical distribution characteristics of heavy metals among the five soil profile sampling sites were observed,which might be attributed to the various transport paths of heavy metals from the integrated waste management facility to the surrounding soil.Pearson correlation coefficient and principal component analysis indicated that the abundance of Cr,Cu,Ni,Pb,Zn and As in soil were influenced by human activities,while Cd and Hg were mainly controlled by natural conditions.The potential pollution indices of heavy metals were in the order of:Hg>Cd>As>Ni>Cu>Pb>Cr>Zn,and the ecological risk index(RI)was less than 150,suggesting a low-level eco-risk potential.This study showed that the accumulation of heavy metals in this research site did not reach high pollution level,and therefore posed a low eco-risk potential in the profile soil near the integrated waste management facility.This study provides evidence for estimating the impact paths of the integrated waste management facility on the surrounding soil and assisting in subsequent management steps.
作者
刘洪华
朱水
董杰
徐红兵
付佳妮
徐锐
刘海松
辛佳
LIU Honghua;ZHU Shui;DONG Jie;XU Hongbing;FU Jiani;XU Rui;LIU Haisong;XIN Jia(Geological Engineering Survey Institute of Qingdao,Qingdao,266100,China;Key Laboratory of Urban Geology and Underground Space Resources Shandong Provincial Bureau of Geology and Mineral Resources,Qingdao,266100,China;Geological Mine Geotechnical Engineering Co.,Ltd.of Qingdao,Qingdao,266100,China;Key Laboratory of Marine Environment and Ecology,Ministry of Education,College of Environmental Science and Engineering,Ocean University of China,Qingdao,266100,China)
出处
《环境化学》
CAS
CSCD
北大核心
2021年第8期2388-2398,共11页
Environmental Chemistry
基金
国家自然科学基金(41701619)资助.
关键词
重金属
垃圾处理园区
空间分布
污染输入路径
污染风险评价
heavy metal
integrated waste management facility
spatial distribution
pollution input path
pollution risk assessment
