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首页> 外文期刊>Applied Surface Science >Adsorption isotherms and kinetics of methylene blue on a low-cost adsorbent recovered from a spent catalyst of vinyl acetate synthesis
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Adsorption isotherms and kinetics of methylene blue on a low-cost adsorbent recovered from a spent catalyst of vinyl acetate synthesis

机译：从乙酸乙烯酯合成废催化剂中回收的低成本吸附剂上的亚甲基蓝吸附等温线和动力学

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摘要

A regenerated activated carbon used as catalyst support in the synthesis of vinyl acetate has been tested as a low-cost adsorbent for the removal of dyes. After a thorough textural characterization of the regenerated activated carbon, its adsorption isotherms and kinetics were determined using methylene blue as model compound at different initial concentrations. Both Langmuir and Freundlich isotherm models were developed and then compared. It was found that the equilibrium data were best represented by the Langmuir isotherm model. The kinetic data were fitted to pseudo-first-order, pseudo-second-order and intraparticle diffusion models, and it was found that the best fitting corresponded to the pseudo-second-order kinetic model. The results showed that this novel adsorbent had a high adsorption capacity, making it suitable for use in the treatment of methylene blue enriched wastewater.
机译：已经测试了在乙酸乙烯酯的合成中用作催化剂载体的再生活性炭，作为用于去除染料的低成本吸附剂。对再生的活性炭进行彻底的结构表征后，使用亚甲基蓝作为模型化合物在不同的初始浓度下测定其吸附等温线和动力学。 Langmuir和Freundlich等温线模型均已开发，然后进行了比较。发现平衡数据最好用Langmuir等温线模型表示。将动力学数据拟合到伪一阶，伪二阶和粒子内扩散模型，发现最佳拟合对应于伪二阶动力学模型。结果表明，该新型吸附剂具有较高的吸附能力，适合用于处理富含亚甲基蓝的废水。

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  • 来源
    《Applied Surface Science》 |2010年第8期|2569-2576|共8页
  • 作者

    Zhengyong Zhang; Zebiao Zhang; Y. Fernandez; J.A. Menendez; Hao Niu; Jinhui Peng; Libo Zhang; Shenghui Guo;

  • 作者单位

    Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China Key Laboratory of Unconventional Metallurgy, Kunming University of Science and Technology, Ministry of Education, 650093, China;

    Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China Key Laboratory of Unconventional Metallurgy, Kunming University of Science and Technology, Ministry of Education, 650093, China;

    Institute Nacional del Carbon, CSIC, Apartado 73, 33080 Oviedo, Spain;

    Institute Nacional del Carbon, CSIC, Apartado 73, 33080 Oviedo, Spain;

    Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China Key Laboratory of Unconventional Metallurgy, Kunming University of Science and Technology, Ministry of Education, 650093, China;

    Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China Key Laboratory of Unconventional Metallurgy, Kunming University of Science and Technology, Ministry of Education, 650093, China;

    Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China Key Laboratory of Unconventional Metallurgy, Kunming University of Science and Technology, Ministry of Education, 650093, China;

    Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China Key Laboratory of Unconventional Metallurgy, Kunming University of Science and Technology, Ministry of Education, 650093, China;

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  • 正文语种 eng
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  • 关键词

    regenerated activated carbon; spent catalyst; basic dye; adsorption isotherm; kinetic;

    机译：再生活性炭废催化剂碱性染料吸附等温线动力学的;

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