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| 格尔木河表层沉积物重金属污染现状及潜在生态风险评价 |
| Pollution Status and Potential Ecological Risk Assessment of the Heavy Metals in the Surface Sediments of the Golmud River |
| 投稿时间：2020-06-24 修订日期：2020-08-20 |
| DOI：10.12119/j.yhyj.202101010 |
| 中文关键词: 重金属元素 污染评价 生态风险评价 格尔木河 多元统计分析 |
| 英文关键词:Heavy metal Pollution assessment Ecological risk assessment Golmud River Multivariate statistical analysis |
| 基金项目:国家重点研发计划项目(2018YFC0406605)；国家自然基金面上项目(41671521)；青海省科技创新平台(2018-ZJ-T10,2018-ZJ-T03,2020-ZJ-T03)；第二次青藏高原综合科学考察研究(2019QZKK0805)；中国科学院重点部署项目(ZDRW-ZS-2020-3) |
| 作者 | 单位 | | 相江芸 | 中国科学院青海盐湖研究所,中国科学院盐湖资源综合高效利用重点实验室,青海 西宁 810008
中国科学院大学,北京 100049 | | 王建萍 | 中国科学院青海盐湖研究所,中国科学院盐湖资源综合高效利用重点实验室,青海 西宁 810008 | | 何袖辉 | 中国地质调查局昆明自然资源综合调查中心,云南 昆明 650111 | | 韩进军 | 中国科学院青海盐湖研究所,中国科学院盐湖资源综合高效利用重点实验室,青海 西宁 810008
中国科学院大学,北京 100049 | | 王二龙 | 中国科学院青海盐湖研究所,中国科学院盐湖资源综合高效利用重点实验室,青海 西宁 810008
中国科学院大学,北京 100049 |
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| 中文摘要: |
| 为了解格尔木河环境现状以及格尔木市开发所带来的影响,对格尔木河表层沉积物共计9个采样点的七种重金属元素(As、Cd、Cr、Cu、Ni、Pb、Zn)的浓度分布特征进行了分析,并利用多元统计方法(因子分析、聚类分析及相关性分析)以及不同的污染和生态风险指标进行综合评价,得出以下结论:格尔木河表层沉积物元素Cd主要来源于人类活动输入,Igeo指示元素Cd、Cr在格尔木河下游污染程度达到轻度污染,其它元素无污染,mCd指示各采样点的污染程度为无~很低,指标PLI指示各采样点的污染程度为低或中等,整个研究区域的PLIzone值为1.06,指示研究区域内沉积物的重金属污染程度中等。单元素的潜在风险指数(Ei)指示重金属生态危害程度均很低,各个采样点的潜在生态风险指数(RI)也指示为低等级,但仍要注意人类活动引起的重金属潜在生态危害,尤其是元素Cd的输入。出格尔木市后元素浓度及Igeo值均逐渐增高,mCd、PLI及RI同样有显著的增长趋势,指示格尔木河受格尔木市人类活动的影响。格尔木河中游(格尔木市区段)相对于格尔木河上游及下游整体均表现为低浓度、低污染及低生态风险,指示格尔木河河道治理对控制重金属污染、改善河流环境及保护生态环境有重要的意义。 |
| 英文摘要: |
| In order to study the pollution status of the Golmud River and the possible influence of the Golmud city on the river enviroment,the distribution characteristics of seven kinds of heavy metal(As,Cd,Cr,Cu,Ni,Pb,Zn)concentrations in the surface sediments of the Golmud River were discussed.Also the multivariate statistical method,including the factor analysis,cluster analysis and Pearson correlation coefficient and different pollution and ecological risk index are conducted for comprehensive evaluation.The conclusions are as followings:the Cd in the surface sediments of the Golmud River is mainly from human activities input；the indices of the Igeo indicate elements Cd and Cr in the downstream of the Golmud River of Golmud City are at mild pollution with other elements pollution-free；the indices of the mCd instruct that pollution levels are free-low；the indices of PLI suggest that each sampling site is at low or medium pollution level；the PLIzone value was 1.06,indicating the element pollution of sediments in the whole area is medium.The potential risk index(Ei)of a single element indicates that the degree of ecological damage of pollutants is very low,and the RI of each sampling point also indicates low level.However,attentions should still be paid to the potential ecological damage caused by human activities,especially the input of element Cd.After leaving Golmud city,the concentrations and the Igeo values of the elements gradually increased,while mCd,PLI and RI also showed a prominent increasing trend,indicating that Golmud River was affected by the human activities from the Golmud City.Compared with the upper and lower reaches of the Golmud River,the urban section of Golmud River shows low concentrations,low pollution and low ecological risk,indicating that river treatment of the Golmud River is of great significance for controlling heavy metal pollution,improving river environment and ecological environment protection. |
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