δ-MnO_2对重金属Tl(Ⅰ)的吸附效能及影响因素

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英文篇名：Adsorption of Tl (Ⅰ) on δ-MnO_2 and Its Influencing Factors 作者：宋嘉慧 ; 皇甫小留 ; 何强 ; 马军 ; 蒋绍阶 ; 徐仰辉 ; 黄瑞星 ; 王雅安 英文作者：SONG Jia-hui;HUANGFU Xiao-liu;HE Qiang;MA Jun;JIANG Shao-jie;XU Yang-hui;HUANG Rui-xing;WANG Ya-an;Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment < Ministry of Education > ,Faculty of Urban Construction and Environmental Engineering,Chongqing University;State Key Laboratory of Urban Water Resource and Environment,School of Environment,Harbin Institute of Technology; 关键词：MnO_2 ; 铊 ; 吸附 ; 表面络合模型 ; 影响因素 英文关键词：MnO_2;;thallium;;adsorption;;surface complexation model;;influencing factor 中文刊名：中国给水排水 英文刊名：China Water & Wastewater 机构：重庆大学城市建设与环境工程学院三峡库区生态环境教育部重点实验室;哈尔滨工业大学环境学院城市水资源与水环境国家重点实验室; 出版日期：2019-05-01 出版单位：中国给水排水 年：2019 期：09 基金：国家自然科学基金资助项目(51608067、51878092);; 重庆市研究生科研创新项目(CYS18029) 语种：中文; 页：62-66 页数：5 CN：12-1073/TU ISSN：1000-4602 分类号：X52

摘要

研究了δ-MnO_2对水体中Tl(Ⅰ)的吸附去除效能,并探讨了水环境条件对δ-MnO_2吸附Tl(Ⅰ)的影响规律。结果表明,δ-MnO_2对Tl(Ⅰ)的吸附效果良好,在5 min内即可达到吸附平衡,吸附容量高达581 mg/g,且吸附等温曲线符合Langmuir模型;δ-MnO_2对Tl(Ⅰ)的吸附过程符合三层表面络合模型。提高水体的pH值有利于δ-MnO_2对Tl(Ⅰ)的吸附去除;水体中竞争性阳离子的存在不利于δ-MnO_2对Tl(Ⅰ)的吸附去除,且二价阳离子的影响大于一价阳离子;天然有机物富里酸和腐殖酸对δ-MnO_2吸附Tl(Ⅰ)有轻微抑制作用。
        The adsorption efficiency of Tl (Ⅰ) on δ-MnO_2 was investigated,and the influence of water environmental conditions on adsorption was explored. The results showed that δ-MnO_2 had good adsorption effect on Tl (Ⅰ). The adsorption equilibrium was reached within 5 minutes,and the adsorption capacity was up to 581 mg/g which conformed to the Langmuir model. In addition,the adsorption process complied with the three-layer surface complexation models. Increasing p H of the solution was conducive to the adsorption of Tl (Ⅰ) on δ-MnO_2. However,the existence of competitive cation was adverse to adsorption effect,and the influence of bivalent cation was greater than that of univalent cation. In addition,natural organic matter like fulvic acid and humic acid had a slight inhibitory effect on the adsorption of Tl (Ⅰ) on δ-MnO_2 surface.

引文

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