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首页> 外文期刊>Environmental Science & Technology >Environmentally Friendly in Situ Regeneration of Graphene Aerogel as a Model Conductive Adsorbent
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Environmentally Friendly in Situ Regeneration of Graphene Aerogel as a Model Conductive Adsorbent

机译：石墨烯气凝胶作为模型导电吸附剂的环保原位再生

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src="http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/esthag/2018/esthag.2018.52.issue-2/acs.est.7b02795/20180111/images/medium/es-2017-02795j_0007.gif">Adsorption is a classical process widely used in industry and environmental protection, and the regeneration of exhausted adsorbents, as the reverse process of adsorption, is vital to achieving a sustainable adsorption process. Chemical and thermal regeneration, which feature high costs and environmental side effects, are classical but not environmentally friendly methods. Herein, a new regeneration method based on an electrochemical process using graphene aerogel (GA) as a model conductive adsorbent was proposed. First, 3D GA was prepared to adsorb organic and inorganic pollutants, avoiding the inconvenience of using powdered graphene. Then, the exhausted GA was cleaned by the electrochemical desorption and degradation of adsorbed organic pollutants if undesired and the electrorepulsion of adsorbed metal ions in the absence of any additional chemicals, showing a high processing capability of 1.21 L g–1 GA h–1 and low energy consumption (∼0.2 kWh m–3 solution). The mechanisms involved in the electrochemistry-induced desorption process cover a decline in the GA adsorption performance depended on the electrochemically adjustable surface charge conditions, and the further repulsion and migration of adsorbates is subject to the strong in situ electric field. This work has important implications for the development of environmentally friendly regeneration processes and qualified adsorbents as well as the application of a green and efficient regeneration concept for traditional adsorption processes.
机译：src =“ http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/esthag/2018/esthag.2018.52.issue-2/acs.est.7b02795/20180111/images/medium /es-2017-02795j_0007.gif“>吸附是一种广泛用于工业和环保领域的经典工艺，作为吸附的逆过程，废吸附剂的再生对实现可持续的吸附过程至关重要。具有高成本和环境副作用的化学和热再生是经典方法，但不是环境友好的方法。在此，提出了一种新的基于石墨烯气凝胶（GA）作为模型导电吸附剂的电化学工艺再生方法。首先，准备了3D GA来吸附有机和无机污染物，避免了使用粉末状石墨烯带来的不便。然后，通过化学方法解吸和降解吸附的有机污染物（如果不希望的话）以及在不添加任何其他化学物质的情况下对吸附的金属离子进行电排斥来清洁耗尽的GA，显示出1.21 L g -1的高处理能力。 sup> GA h –1 和低能耗（〜0.2 kWh m –3 解决方案）。电化学诱导的解吸过程涉及的机理包括，GA吸附性能的下降取决于电化学可调节的表面电荷条件，并且被吸附物的进一步排斥和迁移会受到强烈的原位电场的影响。这项工作对开发环保型再生工艺和合格的吸附剂以及将绿色高效再生概念应用于传统吸附工艺具有重要意义。

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  • 来源
    《Environmental Science & Technology》 |2018年第2期|739-746|共8页
  • 作者

    Meilan Pan; Chao Shan; Xiaolin Zhang; Yanyang Zhang; Chanyuan Zhu; Guandao Gao; Bingcai Pan;

  • 作者单位

    Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China;

    State Key Laboratory of Pollution Control and Resource Reuse, School of Environment and Research Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing 210023, China;

    State Key Laboratory of Pollution Control and Resource Reuse, School of Environment and Research Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing 210023, China;

    State Key Laboratory of Pollution Control and Resource Reuse, School of Environment and Research Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing 210023, China;

    State Key Laboratory of Pollution Control and Resource Reuse, School of Environment and Research Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing 210023, China;

    State Key Laboratory of Pollution Control and Resource Reuse, School of Environment and Research Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing 210023, China;

    State Key Laboratory of Pollution Control and Resource Reuse, School of Environment and Research Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing 210023, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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