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首页> 外文期刊>RSC Advances >Preparation and adsorption behaviors of sodium alginate-based adsorbent-immobilized beta-cyclodextrin and graphene oxide
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Preparation and adsorption behaviors of sodium alginate-based adsorbent-immobilized beta-cyclodextrin and graphene oxide

机译：藻酸钠的吸附剂 - 固定β-环糊精和甲氧化物的制备及吸附性能

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摘要

Highly water soluble graphene oxide (GO) was synthesized via a modified Hummers method. A sodium alginate (SA)-based adsorbent-immobilized beta-cyclodextrin (beta-CD) and GO gel (SCGG) with excellent regeneration ability were prepared. The adsorptive properties of methylene blue (MB) on the SCGG adsorbent were studied. The results showed that when the dosage of the adsorbent was 1.0 g, pH of the solution was 7, temperature was 35 degrees C, initial concentration of MB was 50 mg L-1, and adsorption time was 180 min, the removal rate of MB was 84.98% and the adsorption capacity was 133.24 mg g(-1). The isotherms and kinetics of adsorption were investigated to reveal that the equilibrium adsorption and kinetics were well-described by the Freundlich model and pseudo-second-order kinetics, respectively. The thermodynamic parameters showed that the adsorption process was spontaneous and endothermic in nature. The mechanical property of the SCGG was improved by the addition of GO. The regeneration removal rate of MB was more than 82% after six recycles.
机译：通过改性的悍马方法合成高度水溶性石墨烯氧化物（GO）。制备了藻酸钠（SA）的吸附剂固定化的β-环糊精（β-CD）和具有优异再生能力的凝胶（SCGG）。研究了SCGG吸附剂上亚甲基蓝（MB）的吸附性能。结果表明，当吸附剂的剂量为1.0g时，溶液的pH为7，温度为35℃，初始浓度为50mg，吸附时间为180分钟，MB的去除率为84.98％，吸附能力为133.24 mg（-1）。研究了等温线和吸附动力学，揭示了弗雷奇里奇模型和伪二阶动力学的均衡吸附和动力学。热力学参数表明吸附过程本质上是自发性和吸热的。通过添加Go来改善SCGG的力学性质。六次回收后，MB的再生去除率超过82％。

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  • 来源
    《RSC Advances》 |2017年第50期|共9页
  • 作者

    Wu Yanchen; Qi Houjuan; Shi Cai; Ma Rongxiu; Liu Shouxin; Huang Zhanhua;

  • 作者单位

    Northeast Forestry Univ Key Lab Biobased Mat Sci &

    Technol Minist Educ Harbin 150040 Peoples R China;

    Northeast Forestry Univ Key Lab Biobased Mat Sci &

    Technol Minist Educ Harbin 150040 Peoples R China;

    Northeast Forestry Univ Key Lab Biobased Mat Sci &

    Technol Minist Educ Harbin 150040 Peoples R China;

    Northeast Forestry Univ Key Lab Biobased Mat Sci &

    Technol Minist Educ Harbin 150040 Peoples R China;

    Northeast Forestry Univ Key Lab Biobased Mat Sci &

    Technol Minist Educ Harbin 150040 Peoples R China;

    Northeast Forestry Univ Key Lab Biobased Mat Sci &

    Technol Minist Educ Harbin 150040 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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