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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.[PENG Cuiying,LI Zhiliang,HUANG Wei,ZUO Hui,CHEN Su,ZHU Yunhua,HU Jingsong,XIE Hongyan,LIU Jun.Heavy Metal Pollution Characteristics and Potential Ecological Risk Assessment of Sediments in Hengyang-Zhuzhou Section of Xiangjiang River[J].Journal of University of South China(Science and Technology),2019,33(4):89~96.]

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

Heavy Metal Pollution Characteristics and Potential Ecological Risk Assessment of Sediments in Hengyang-Zhuzhou Section of Xiangjiang River

投稿时间：2019-03-05

DOI：

中文关键词: 湘江衡阳-株洲段重金属污染生态风险

英文关键词:Xiangjiang River Hengyang-Zhuzhou section heavy metal pollution ecological risk

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)

作者	单位	E-mail
彭翠英	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	2517618772@qq.com
李志良	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
黄微	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
左慧	南华大学衡阳医学院,湖南衡阳 421001
谌苏	南华大学衡阳医学院,湖南衡阳 421001
朱允华	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
胡劲松	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
谢红艳	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
刘俊	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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中文摘要:

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I_geo值均为6级,已达到了极强的污染程度;虽然各采样点Fe的I_geo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。

英文摘要:

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 I_geo value of Cd at each sampling point is 6 and has reached a very strong pollution level;although the I_geo 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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