| 湘江中游衡阳-株洲段沉积物几种典型重金属的污染特征及其生态风险评价 |
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| 引用本文： | 彭翠英,李志良,黄微,左慧,谌苏,朱允华,胡劲松,谢红艳,刘俊.湘江中游衡阳-株洲段沉积物几种典型重金属的污染特征及其生态风险评价[J].南华大学学报(自然科学版),2019,33(4):89-96. |
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| 作者姓名： | 彭翠英 李志良 黄微 左慧 谌苏 朱允华 胡劲松 谢红艳 刘俊 |
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| 作者单位： | 南华大学 衡阳医学院,湖南 衡阳 421001;生物毒理与生态修复衡阳市重点实验室,湖南 衡阳 421001;有色金属矿区耕地重金属污染生态阻抗技术研究衡阳市重点实验室,湖南 衡阳 421001,南华大学 衡阳医学院,湖南 衡阳 421001;生物毒理与生态修复衡阳市重点实验室,湖南 衡阳 421001,南华大学 衡阳医学院,湖南 衡阳 421001;生物毒理与生态修复衡阳市重点实验室,湖南 衡阳 421001;有色金属矿区耕地重金属污染生态阻抗技术研究衡阳市重点实验室,湖南 衡阳 421001,南华大学 衡阳医学院,湖南 衡阳 421001,南华大学 衡阳医学院,湖南 衡阳 421001,南华大学 衡阳医学院,湖南 衡阳 421001;生物毒理与生态修复衡阳市重点实验室,湖南 衡阳 421001;有色金属矿区耕地重金属污染生态阻抗技术研究衡阳市重点实验室,湖南 衡阳 421001,南华大学 衡阳医学院,湖南 衡阳 421001;生物毒理与生态修复衡阳市重点实验室,湖南 衡阳 421001;有色金属矿区耕地重金属污染生态阻抗技术研究衡阳市重点实验室,湖南 衡阳 421001,南华大学 衡阳医学院,湖南 衡阳 421001;生物毒理与生态修复衡阳市重点实验室,湖南 衡阳 421001;有色金属矿区耕地重金属污染生态阻抗技术研究衡阳市重点实验室,湖南 衡阳 421001,南华大学 衡阳医学院,湖南 衡阳 421001;生物毒理与生态修复衡阳市重点实验室,湖南 衡阳 421001;有色金属矿区耕地重金属污染生态阻抗技术研究衡阳市重点实验室,湖南 衡阳 421001 |
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| 基金项目： | 湖南省自然科学基金项目(2018JJ2325);湖南省教育厅重点项目(15A168);衡阳市科技局项目(2018KJ111;2016KF14) |
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| 摘 要： | 为研究湘江中游衡阳-株洲段沉积物中重金属的污染特征及其生态风险,对24个沉积物样品进行重金属检测分析,使用多种方法评价污染程度及等级。研究表明,湘江中游衡阳-株洲段沉积物中重金属存在很强的积累现象,尤其是Cd污染特别严重。且Cd主要以可交换态和碳酸盐结合态存在于沉积物,Pb主要以铁锰氧化物态存在于沉积物中,容易被外界利用或者受外界因素变化而使其被动植物吸收增加。与《国家土壤环境质量标准》二级标准比较,各采样点Cu、Pb、Zn尚未超标,但Cd超标4.98～22.08倍。单因子指数和地积累指数均表明,Cd达到了严重污染,各采样点底泥的Cd的Igeo值均为6级,已达到了极强的污染程度;虽然各采样点Fe的Igeo也均为6级,但主要以残渣态为主,对生态环境影响较低; Mn只产生了轻度的污染,Mg对环境无污染。各采样点分析发现,松柏镇和霞湾可能是此江段主要污染源。在后续治理中,应该加大对于Cd污染的治理,减少对于周边生命健康的危害。
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| 关 键 词： | 湘江 衡阳-株洲段 重金属污染 生态风险 |
| 收稿时间： | 2019/3/5 0:00:00 |
Heavy Metal Pollution Characteristics and Potential Ecological Risk Assessment of Sediments in Hengyang-Zhuzhou Section of Xiangjiang River |
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| PENG Cuiying,LI Zhiliang,HUANG Wei,ZUO Hui,CHEN Su,ZHU Yunhu,HU Jingsong,XIE Hongyan and LIU Jun.Heavy Metal Pollution Characteristics and Potential Ecological Risk Assessment of Sediments in Hengyang-Zhuzhou Section of Xiangjiang River[J].Journal of Nanhua University:Science and Technology,2019,33(4):89-96. |
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| Authors: | PENG Cuiying LI Zhiliang HUANG Wei ZUO Hui CHEN Su ZHU Yunhu HU Jingsong XIE Hongyan and LIU Jun |
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| Institution: | Hengyang Medical College,University of South China,Hengyang,Hunan 421001,China;The Key Laboratory of Hengyang City on Biological Toxicology and Ecological Restoration, Hengyang,Hunan 421001,China;The Key Laboratory of Hengyang City on Ecological Impedance Technology of Heavy Metal Pollution in Cultivated Soil of Nonferrous Metal Mining Area,Hengyang,Hunan 421001,China,Hengyang Medical College,University of South China,Hengyang,Hunan 421001,China;The Key Laboratory of Hengyang City on Biological Toxicology and Ecological Restoration, Hengyang,Hunan 421001,China,Hengyang Medical College,University of South China,Hengyang,Hunan 421001,China;The Key Laboratory of Hengyang City on Biological Toxicology and Ecological Restoration, Hengyang,Hunan 421001,China;The Key Laboratory of Hengyang City on Ecological Impedance Technology of Heavy Metal Pollution in Cultivated Soil of Nonferrous Metal Mining Area,Hengyang,Hunan 421001,China,Hengyang Medical College,University of South China,Hengyang,Hunan 421001,China,Hengyang Medical College,University of South China,Hengyang,Hunan 421001,China,Hengyang Medical College,University of South China,Hengyang,Hunan 421001,China;The Key Laboratory of Hengyang City on Biological Toxicology and Ecological Restoration, Hengyang,Hunan 421001,China;The Key Laboratory of Hengyang City on Ecological Impedance Technology of Heavy Metal Pollution in Cultivated Soil of Nonferrous Metal Mining Area,Hengyang,Hunan 421001,China,Hengyang Medical College,University of South China,Hengyang,Hunan 421001,China;The Key Laboratory of Hengyang City on Biological Toxicology and Ecological Restoration, Hengyang,Hunan 421001,China;The Key Laboratory of Hengyang City on Ecological Impedance Technology of Heavy Metal Pollution in Cultivated Soil of Nonferrous Metal Mining Area,Hengyang,Hunan 421001,China,Hengyang Medical College,University of South China,Hengyang,Hunan 421001,China;The Key Laboratory of Hengyang City on Biological Toxicology and Ecological Restoration, Hengyang,Hunan 421001,China;The Key Laboratory of Hengyang City on Ecological Impedance Technology of Heavy Metal Pollution in Cultivated Soil of Nonferrous Metal Mining Area,Hengyang,Hunan 421001,China and Hengyang Medical College,University of South China,Hengyang,Hunan 421001,China;The Key Laboratory of Hengyang City on Biological Toxicology and Ecological Restoration, Hengyang,Hunan 421001,China;The Key Laboratory of Hengyang City on Ecological Impedance Technology of Heavy Metal Pollution in Cultivated Soil of Nonferrous Metal Mining Area,Hengyang,Hunan 421001,China |
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| Abstract: | In order to study the pollution characteristics and ecological risk of heavy metals in the sediments in the Hengyang-Zhuzhou section of the Xiangjiang River,24 sediment samples were analyzed for heavy metals,and various methods were used to evaluate pollution levels and grades. Studies have shown that there is a strong accumulation of heavy metals in the sediments of the Hengyang-Zhuzhou section of the Xiangjiang River,especially Cd.And Cd is mainly present in the deposits in the exchangeable state and the carbonate-bound state.Pb is mainly present in the deposit in the form of iron-manganese oxide,and is easily utilized by the outside or by external factors to increase the absorption of passive plants.Compared with the second-level standard of National Soil Environmental Quality Standard,Cu,Pb and Zn have not exceeded the standard,but Cd exceeded the standard by 4.98-22.08 times.Both the single factor index and the ground accumulation index indicate that Cd has reached serious pollution.The Igeo value of Cd at each sampling point is 6 and has reached a very strong pollution level;although the Igeo of Fe at each sampling point is also Level 6,but mainly based on the residual state,has a low impact on the ecological environment,Mn only produces mild pollution,and Mg has no pollution to the environment.Analysis of each sampling point found that Songbai Town and Xiawan may be the main sources of pollution in this section.In the follow-up governance,the treatment of Cd pollution should be increased to reduce the harm to the surrounding life and health. |
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| Keywords: | Xiangjiang River Hengyang-Zhuzhou section heavy metal pollution ecological risk |
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