密云县境内潮河流域土壤重金属分析评价  

Analysis and Evaluation of Heavy Metals Along the Chaohe River in Miyun County

作　　者：于洋[1] 高宏超[1] 马俊花[1] 李迎霞[1] 莫罹[2] 孔彦鸿[2] 

机构地区：[1]北京师范大学环境学院,水环境模拟国家重点实验室,北京100875 [2]中国城市规划设计研究院,北京100044

出　　处：《环境科学》2013年第9期3572-3577,共6页Environmental Science

基　　金：国家水体污染控制与治理科技重大专项(2009ZX07318-001);国家自然科学基金委创新研究群体科学基金项目(51121003);国家自然科学基金项目(51278054)

摘　　要：为了解潮河流域周边土壤重金属污染状况,判断重金属污染对周边饮用水源的威胁程度,沿潮河流域采集了15个潮河流域周边土壤样品,测定样品中重金属含量.结果表明,重金属As、Cd、Cr、Cu、Hg、Ni、Pb、Zn的平均值分别为7.94、0.16、127.71、38.45、0.22、45.97、21.98、81.06μg.g-1.除Pb以外,各采样点土壤重金属含量均值均高于北京市土壤重金属含量背景值.与上海黄浦江水源地相比,重金属Cr、Cu、Ni浓度较高,其他重金属处于中等水平.地累积指数法评价表明Cr、Hg处于中度污染,Cu、Ni处于无-中度污染,其他重金属无污染.生态危害指数法表明,Hg达到强生态风险等级,其他金属均处于低生态风险等级,研究区域整体处于中等生态风险水平,重金属Cr、Hg、Cu、Ni需要加以控制.In order to explore the heavy metal concentrations in soils surrounding the Chaohe River,15 soil samples were collected along the Chaohe River.Results show that average concentrations of As,Cd,Cr,Cu,Hg,Ni,Pb,Zn are 7.94,0.16,127.71,38.45,0.22,45.97,21.98,81.06 μg.g-1,respectively.The mean concentrations of 15 samples for most heavy metals are higher than the background values of Beijing soil except Pb.Compared to the heavy metal concentrations in the soil of Shanghai Huangpu River water resource area,the mean concentrations of Cr,Cu and Ni are higher and concentrations of other heavy metals are at a moderate level.Geo-accumulation index method was used to evaluate the pollution status of different heavy metals.Results show that the pollution of Cr and Hg is moderate.The pollution of Cu and Ni is between no to moderate.There is no pollution of As,Cd,Pb and Zn in the study area.Ecological risk index method was also used to evaluate the ecological impact.Results show that the pollution level of Hg is strong and Cu is medium.Other heavy metals are at a slight pollution level.The samplings region as a whole is at a medium ecological pollution level.In a word,Hg,Cr,Ni,and Cu need to be controlled.

关 键 词：土壤重金属 水源地 地累积指数法 生态危害指数法 潮河 

分 类 号：X53[环境科学与工程—环境工程]