西藏纳木错近岸带水体中重金属赋存特征、风险评价及来源探究  被引量:1

Occurrence characteristics,risk assessment and source of heavy metals in the coastal zone of Namco,Tibet

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作  者:于婉婷 王卓 布多[1] 崔小梅 YU Wan-ting;WANG Zhuo;BU Duo;CUI Xiao-mei(Key Laboratory of Biodiversity and Environment on the Qinghai-Tibetan Plateau,Ministry of Education,School of Ecology and Environment,Tibet University,Lhasa 850000,China)

机构地区:[1]西藏大学生态环境学院青藏高原生物多样性与生态环境保护教育部重点实验室,西藏拉萨850000

出  处:《环境生态学》2025年第1期21-26,共6页Environmental Ecology

基  金:国家重点研发计划子课题(2022YFD1601001-01);国家自然科学金项目(22466032);环境化学与生态毒理学国家重点实验室开放基金(KF-2021-05);西藏大学人才发展激励计划学科领军人才(2022ZDLJ03);西藏大学大学生创新训练项目(S202310694012)资助。

摘  要:本研究旨在探究纳木错流域近岸带水体中的重金属赋存特征、污染风险及其来源。通过采集26个表层水样,分析测定了As、Cd、Co、Cr、Cu、Fe、Hg、Mn、Ni、Pb、Zn共11种重金属元素的浓度。结果显示,重金属的平均浓度顺序为Fe>As>Hg>Mn>Cu>Zn>Co>Pb>Ni>Cr>Cd。单因子污染指数法和内梅罗综合污染指数评估水体中的重金属潜在风险,结果表明Hg和As的污染风险较高。相关性分析和主成分分析结果显示,纳木错水体中的重金属主要来源于2大类:工农业生产和人类活动的污染源(如Zn、Fe、Mn、As、Pb、Cd)及土壤母质的自然源(如Ni、Cr、Cu)。The purpose of this study was to explore the occurrence characteristics,pollution risks and sources of heavy metals in the coastal zone of the Namco Basin.The concentrations of 11 heavy metal elements,including As,Cd,Co,Cr,Cu,Fe,Hg,Mn,Ni,Pb and Zn,were analyzed and determined by collecting 26 surface water samples.The results showed that the average concentration order of heavy metals was As>Fe>Hg>Mn>Cu>Zn>Co>Pb>Ni>Cr>Cd.The potential risk of heavy metals in water was evaluated by the single-factor pollution index method and the Nemerow comprehensive pollution index,and the results showed that the pollution risk of Hg and As was high.The results of correlation analysis and principal component analysis showed that the heavy metals in Namco water mainly came from two categories:Pollution sources of industrial and agricultural production and human activities(such as Zn,Fe,Mn,As,Pb,Cd)and natural sources of soil parent material(such as Ni,Cr,Cu).

关 键 词:西藏纳木错流域 重金属 污染特征 风险评价 来源解析 

分 类 号:X524[环境科学与工程—环境工程]

 

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