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Chitosan-derived three-dimensional porous carbon for fast removal of methylene blue from wastewater

机译：壳聚糖衍生的三维多孔碳，从废水中快速去除亚甲基蓝色

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摘要

Despite much progress in modifying chitosan as an absorbent for wastewater treatment, it is still difficult for current chitosan-based adsorbents to achieve the desired removal effects towards basic dyes. In this study, chitosan-derived three-dimensional porous carbon (CTC) consisting of large-diameter channels and mesopores was prepared to remove methylene blue (MB) from wastewater. The results indicate that CTC has excellent performance for MB removal, and the maximum adsorption capacity was 925.93 mg g(-1) at 318 K. The adsorption isotherm and kinetics models of MB on CTC could be described well by the Langmuir isotherms and the pseudo-second-order rate model. An experiment to study the CTC removal of MB from a flowing aqueous solution was performed using a homemade device. The water treatment rate of CTC reached 250 L g(-1) h(-1), with high MB removal efficiency (93.4%). Furthermore, the desorption-adsorption experiments indicate that CTC is also a reusable adsorbent that can be applied to recover MB from wastewater. The obtained CTC is a promising alternative for the current expensive absorbents and provides a concept for designing the three-dimensional (3D) structures of raw materials to improve adsorption capability.
机译：尽管在将壳聚糖改性为废水处理的吸收剂时，仍然难以实现目前壳聚糖的吸附剂仍然难以实现对碱性染料的所需去除效果。在该研究中，制备由大直径通道和中孔组成的壳聚糖衍生的三维多孔碳（CTC），从废水中除去亚甲基蓝（Mb）。结果表明，CTC具有优异的MB去除性能，并且在318k下最大吸附容量为925.93mg g（-1）。Langmuir等温线和伪可能会良好地描述CTC上的MB的吸附等温线和动力学模型。 - 排序率模型。使用自制装置进行研究从流动水溶液中的CTC去除Mb的实验。 CTC的水处理率达到250μl（-1）H（-1），高MB去除效率（＆ 93.4％）。此外，解吸吸附实验表明，CTC也是可重复使用的吸附剂，其可用于从废水中恢复MB。所获得的CTC是当前昂贵的吸收剂的有希望的替代方案，并提供了设计原料的三维（3D）结构以提高吸附能力的概念。

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  • 来源
    《RSC Advances》 |2018年第3期|共10页
  • 作者

    Jin Qian; Li Yadong; Yang Desong; Cui Jianghu;

  • 作者单位

    Shihezi Univ Coll Agr Shihezi 832000 Xinjiang Peoples R China;

    Shihezi Univ Coll Agr Shihezi 832000 Xinjiang Peoples R China;

    Shihezi Univ Coll Agr Shihezi 832000 Xinjiang Peoples R China;

    Guangdong Inst Ecoenvironm Sci &

    Technol Guangdong Key Lab Integrated Agroenvironm Pollut Guangzhou 510650 Guangdong Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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