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U (Ⅵ)在石棉尾矿酸浸渣上的吸附

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范燕青, 胡春联, 陈元涛, 张炜. U (Ⅵ)在石棉尾矿酸浸渣上的吸附[J]. 环境工程学报, 2016, 10(10): 5498-5502. doi: 10.12030/j.cjee.201504199
引用本文: 范燕青, 胡春联, 陈元涛, 张炜. U (Ⅵ)在石棉尾矿酸浸渣上的吸附[J]. 环境工程学报, 2016, 10(10): 5498-5502. doi: 10.12030/j.cjee.201504199
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FAN Yanqing, HU Chunlian, CHEN Yuantao, ZHANG Wei. Sorption of U(Ⅵ) on acid leaching residue of asbestos tailings[J]. Chinese Journal of Environmental Engineering, 2016, 10(10): 5498-5502. doi: 10.12030/j.cjee.201504199
Citation: FAN Yanqing, HU Chunlian, CHEN Yuantao, ZHANG Wei. Sorption of U(Ⅵ) on acid leaching residue of asbestos tailings[J]. Chinese Journal of Environmental Engineering, 2016, 10(10): 5498-5502. doi: 10.12030/j.cjee.201504199
shu

U (Ⅵ)在石棉尾矿酸浸渣上的吸附

  • 1.

    青海师范大学实验设备管理中心, 西宁 810008

  • 2.

    青海师范大学化学系, 西宁 810008

  • 基金项目:

    国家自然科学基金资助项目（20967006）

    教育部新世纪优秀人才支持计划（NCET-07-0476）

  • 中图分类号: X703

Sorption of U(Ⅵ) on acid leaching residue of asbestos tailings

  • 1.

    Experimental Equipment Center, Qinghai Normal University, Xining 810008, China

  • 2.

    Department of Chemistry, Qinghai Normal University, Xining 810008, China

  • Fund Project:

  • 摘要: 为了研究U（Ⅵ）在石棉尾矿酸浸渣上的吸附行为，利用红外光谱仪、X射线衍射仪和扫描电镜等手段分别对石棉尾矿和石棉尾矿酸浸渣进行详尽表征。采用静态实验法考察吸附剂浓度、时间、pH、离子强度和温度等因素对吸附的影响，并进一步分析了吸附动力学和热力学。在研究范围内，U（Ⅵ）在石棉尾矿酸浸渣上的吸附受pH值、离子强度和温度的影响明显。当pH6，随pH的增大吸附率会降低，且离子强度越大，吸附率越低，则表明静电吸附或表面络合是其主要的吸附机制。动力学符合准二级动力学方程，热力学符合Langmuir吸附等温线方程。
    Abstract: The asbestos tailing and acid leaching residue were characterized thoroughly by X-ray diffraction (XRD), Fourier transfer infrared spectroscopy (FT-IR), and scanning electron microscopy (SEM). Sorption experiments were conducted as a function of adsorbent concentration, time, pH, ionic strength, and temperature by using the static experimental method. In addition, the kinetic and thermodynamic models were also studied, and the results indicate that sorption of U(Ⅵ) onto acid leaching residue is influenced by pH, ionic strength, and temprature. The main sorption mechanism below pH 6 is an ion exchange or outer complexation. However, the sorption of U(Ⅵ) decreases with increasing pH when the pH is above 6, indicating that the main sorption mechanism in this regime is an electrostatic interaction or outer complexation. The pseudo-second-order rate equation fits the kinetic model well, and the sorption isotherms conform to a Langmuir model.
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  • [1] CHEN Juntao, HAN Yuexin, DING Shufang, et al. The adsorption performance study of acid leaching residue of asbestos tailings. Materials Science Forum, 2011, 685: 246-255
    [2] 施红霞. 石棉废物环境无害化管理对策研讨. 矿业安全与环保, 2011, 38(4): 83-86
    [3] 陈俊涛, 郑水林, 王彩丽, 等. 石棉尾矿酸浸渣对铜离子的吸附性能. 过程工程学报, 2009, 9(3): 486-491 CHEN Juntao, ZHENG Shuilin, WANG Caili, et al. Adsorption of copper ion by calcined acid leaching residue of asbestos tailing. The Chinese Journal of Process Engineering, 2009, 9(3): 486-491(in Chinese)
    [4] 檀竹红, 郑水林, 刘月. 石棉尾矿酸浸渣对铬离子的吸附性能. 过程工程学报, 2008, 8(1): 48-53 TAN Zhuhong, ZHENG Shuilin, LIU Yue. Adsorption of chromium ion by acid leaching residue of asbestos tailing. The Chinese Journal of Process Engineering, 2008, 8(1): 48-53(in Chinese)
    [5] 檀竹红, 郑水林, 张娟. 石棉尾矿酸浸渣对废水中Zn2+的吸附性能研究. 非金属矿, 2007, 30(6): 44-46 TAN Zhuhong, ZHENG Shuilin, ZHANG Juan. Studies on adsorption behaviour of Zn2+ from wastewater by acid leaching residue of asbestos tailing. Non-Metallic Mines, 2007, 30(6): 44-46(in Chinese)
    [6] HUANG Zhaohui, LI Wenjuan, PAN Zihe, et al. High-temperature transformation of asbestos tailings by carbothermal reduction. Clays and Clay Minerals, 2013, 61(1): 75-82
    [7] 郭纯刚, 刘世杰, 尹宏. 纤维水镁石与经铝剂处理的温石棉对巨噬细胞毒性比较. 中华预防医学杂志, 1995, 29(4): 219-221 GUO Chungang, LIU Shijie, YIN Hong. Comparison of toxic effects of brucite and aluminium-treated chrysotile on macrophage. Chinese Journal of Preventive Medicine, 1995, 29(4): 219-221(in Chinese)
    [8] WANG Jian, KANG Dongjuan, YU Xiaolin, et al. Synthesis and characterization of Mg-Fe-La trimetal composite as an adsorbent for fluoride removal. Chemical Engineering Journal, 2015, 264: 506-513
    [9] 高阳阳, 袁亚莉, 胡建邦, 等. 磁性胺肟基功能化CMC对铀酰离子的吸附行为研究. 应用化工, 2014, 43(3): 427-431 GAO Yangyang, YUAN Yali, HU Jianbang, et al. Poly (amidoxime)/carboxymethylated cellulose magnetic composite: Characterization and adsorption behavior for uranyl. Applied Chemical Industry, 2014, 43(3): 427-431(in Chinese)
    [10] 陈帅, 刘峙嵘, 吴振宇. 活性污泥胞外聚合物对铀酰离子的吸附性能. 核化学与放射化学, 2014, 36(1): 47-52 CHEN Shuai, LIU Zhirong, WU Zhenyu. Adsorption of uranyl on extracellular polymeric substances from activated sludge. Journal of Nuclear and Radiochemistry, 2014, 36(1): 47-52(in Chinese)
    [11] XIAO Jiang, CHEN Yuantao, ZHAO Wenhua, et al. Sorption behavior of U(VI) onto Chinese bentonite: Effect of pH, ionic strength, temperature and humic acid. Journal of Molecular Liquids, 2013, 188: 178-185
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  • 收稿日期:  2015-06-28
  • 刊出日期:  2016-10-20

U (Ⅵ)在石棉尾矿酸浸渣上的吸附

  • 1. 青海师范大学实验设备管理中心, 西宁 810008
  • 2. 青海师范大学化学系, 西宁 810008
  • 收稿日期:  2015-06-28
基金项目:

国家自然科学基金资助项目（20967006）

教育部新世纪优秀人才支持计划（NCET-07-0476）

摘要: 为了研究U（Ⅵ）在石棉尾矿酸浸渣上的吸附行为，利用红外光谱仪、X射线衍射仪和扫描电镜等手段分别对石棉尾矿和石棉尾矿酸浸渣进行详尽表征。采用静态实验法考察吸附剂浓度、时间、pH、离子强度和温度等因素对吸附的影响，并进一步分析了吸附动力学和热力学。在研究范围内，U（Ⅵ）在石棉尾矿酸浸渣上的吸附受pH值、离子强度和温度的影响明显。当pH6，随pH的增大吸附率会降低，且离子强度越大，吸附率越低，则表明静电吸附或表面络合是其主要的吸附机制。动力学符合准二级动力学方程，热力学符合Langmuir吸附等温线方程。

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