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首页> 外文期刊>Environmental Science & Technology >Electro-assisted Adsorption of Zn(Ⅱ) on Activated Carbon Cloth in Batch-Flow Mode: Experimental and Theoretical Investigations
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Electro-assisted Adsorption of Zn(Ⅱ) on Activated Carbon Cloth in Batch-Flow Mode: Experimental and Theoretical Investigations

机译：间歇流模式下活性炭布上电助吸附锌（Ⅱ）的实验和理论研究

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摘要

High levels of zinc ion (Zn2+) in environmental scenarios have long been considered to be harmful, and this study was experimentally and theoretically performed to explore the feasibility of electro-assisted adsorption of Zn2+ on activated carbon cloth from aqueous solutions in batch-flow mode. The characteristics of carbon cloth were systematically evaluated using cyclic voltammetry and various surface characterization techniques. Effects of operating parameters, including charging voltage, feed Zn2+ concentration, solution volume, and flow rate, on the dynamic removal process of Zn2+ were examined. Meanwhile, a theoretical model was developed to quantitatively describe the electro-assisted adsorption of Zn2+, and an excellent agreement between the modeling results and the experimental data was observed. The Zn2+ removal mechanisms involve both nonelectrostatic interactions (physi- or chemisorption) and electrostatic interactions. Experimental and theoretical results demonstrated a significant enhancement of Zn2+ adsorption capacity on the carbon electrodes under the electro-assistance. Moreover, the carbon electrodes exhibited good regeneration performance achieved via a simple short-circuiting method and provided good reproducibility over consecutive runs for the removal of Zn2+. The validated model could be applied to predict the effects of important parameters that are difficult to be experimentally manipulated, and is expected to play an important role in establishing the electro-assisted adsorption as a viable treatment technology for zinc wastewater.
机译：长期以来，人们一直认为环境中高水平的锌离子（Zn2 +）是有害的，并且该实验是从理论上进行的，以探索以批流方式从水溶液中电辅助吸附Zn2 +在活性炭布上的可行性。 。使用循环伏安法和各种表面表征技术，系统地评估了碳布的特性。研究了操作参数（包括充电电压，进料Zn2 +浓度，溶液体积和流速）对Zn2 +动态去除过程的影响。同时，建立了一个理论模型来定量描述Zn2 +的电辅助吸附，并且模型化结果与实验数据之间具有很好的一致性。 Zn2 +去除机理涉及非静电相互作用（物理或化学吸附）和静电相互作用。实验和理论结果表明，在电助剂作用下，碳电极上Zn2 +的吸附能力显着提高。此外，碳电极表现出通过简单的短路方法实现的良好再生性能，并且在连续运行中为去除Zn2 +提供了良好的重现性。验证后的模型可用于预测难以通过实验操作的重要参数的影响，并有望在建立电辅助吸附作为锌废水的可行处理技术中发挥重要作用。

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  • 来源
    《Environmental Science & Technology》 |2019年第5期|2670-2678|共9页
  • 作者

    Tang Wangwang; Wang Xiangxi; Zeng Guangming; Liang Jie; Li Xiaodong; Xing Wenle; He Di; Tang Lin; Liu Zhifeng;

  • 作者单位

    Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China|Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha 410082, Hunan, Peoples R China;

    Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China|Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha 410082, Hunan, Peoples R China;

    Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China|Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha 410082, Hunan, Peoples R China;

    Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China|Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha 410082, Hunan, Peoples R China;

    Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China|Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha 410082, Hunan, Peoples R China;

    Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China|Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha 410082, Hunan, Peoples R China;

    Guangdong Univ Technol, Inst Environm Hlth & Pollut Control, Guangzhou 510006, Guangdong, Peoples R China|Guangdong Univ Technol, Guangzhou Key Lab Environm Catalysis & Pollut Con, Sch Environm Sci & Engn, Guangzhou 510006, Guangdong, Peoples R China;

    Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China|Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha 410082, Hunan, Peoples R China;

    Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China|Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha 410082, Hunan, Peoples R China;

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