西藏尼洋河水环境重金属元素水平与风险评估  

Concentration and Risk Assessment of Metal Elements in Nyang River

作　　者：拉巴次仁[1,2] 布多[2] 谭欣[1,2] 陈俊丽[2] 张强英[2] 

机构地区：[1]天津大学环境科学与工程学院,天津300372 [2]西藏大学理学院,西藏拉萨850000

出　　处：《环境监测管理与技术》2017年第4期33-36,共4页The Administration and Technique of Environmental Monitoring

基　　金：国家自然科学基金资助项目(2076005,21267021);“九七三”计划前期研究专项课题基金资助项目(2014CB460612);环境化学与生态毒理学国家重点实验室开放课题基金资助项目(KF2012-8)

摘　　要：在西藏尼洋河流域布设13个代表性采样点采集水样,通过现场测试水样的pH值、电导率等指标和实验室分析水样中18种元素含量,并运用综合指数评价法和Pearson相关性分析法对尼洋河水环境质量状况进行评价。结果表明:尼洋河水样的pH值为8.10~8.80,呈碱性至弱碱性;元素含量基本达到《地表水环境质量标准》(GB 3838—2002)Ⅰ类标准要求;除2、3号采样点重金属元素WQI在1~2之间外,其余11个采样点的WQI均<1,表明尼洋河水环境质量良好,尚未受到重金属明显影响。The water samples were collected from 13 representative sampling sites in Nyang River Basin in Tibet. The pH value and conductivity of the samples were measured and the contents of 18 kinds of elements in the water samples were analyzed. The comprehensive index method and Pearson correlation analysis method were used to evaluate the environmental quality of Nanyang River. The results showed that the pH value of Nyang Riv-er was 8. 10 ？8. 80,which was alkaline to weakly alkaline. The element concentration basically met the demand of ＂ Surface Water Environmental Quality Standard＂（ GB 3838 -2002） . Except for 2 and 3 sampling points, the WQI of the heavy metal element was between 1 and 2 , the remaining 11 sampling points WQI 〈 1 , which indi-cates that the water quality of the Nyang River is good and has not been affected by heavy metals.

关 键 词：水环境 金属元素 风险评价 尼洋河 

分 类 号：X824[环境科学与工程—环境工程] X522