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Adsorption of tetracycline antibiotics from an aqueous solution onto graphene oxide/calcium alginate composite fibers

机译：将四环素抗生素从水溶液吸附到石墨烯氧化物/藻酸钙复合纤维上

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摘要

In this study, we report the preparation of a novel environmentally friendly and highly efficient adsorbent, graphene oxide/calcium alginate (GO/CA) composite fibers, via a freeze-drying method using calcium chloride as a cross-linking reagent between graphene oxide and sodium alginate. The maximum tetracycline adsorption capacity of the GO/CA composite fibers predicted by the Langmuir model reached 131.6 mg g(-1). The adsorption properties of tetracycline onto the fibers were investigated through several parameters including the solution pH, the adsorbent dose, the initial concentration of tetracycline, and the agitation time. The Langmuir and Freundlich adsorption isotherms were used to investigate the adsorption equilibrium. The kinetics of the adsorption process was predicted using the pseudo-first-order and pseudo-second-order kinetic equations. Furthermore, the mechanism of adsorption was investigated, and it was found that the hydrogen bonding and p-p interaction should serve as predominant contributions to the significantly enhanced adsorption capability.
机译：在这项研究中，我们通过使用氯化钙作为十六氧化物和氯化物之间的交联试剂，报告制备新型环保和高效吸附剂，石墨烯氧化物/藻酸钙（GO / CA）复合纤维，作为氧化钙和海藻酸钠。 Langmuir模型预测的Go / Ca复合纤维的最大四环素吸附容量达到131.6mg g（-1）。通过包括溶液pH，吸附剂剂量，四环素的初始浓度和搅拌时间的若干参数研究了四环素在纤维上的吸附性能。使用Langmuir和Freundlich吸附等温线来研究吸附平衡。使用伪第一阶和伪二阶动力学方程预测吸附过程的动力学。此外，研究了吸附机理，发现氢键和P-P相互作用应作为显着增强的吸附能力的主要贡献。

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  • 来源
    《RSC Advances》 |2018年第5期|共6页
  • 作者

    Zhu Haotian; Chen Tao; Liu Jingquan; Li Da;

  • 作者单位

    Qingdao Univ Lab Fiber Mat &

    Modern Text Growing Base State Key Lab Qingdao 266071 Peoples R China;

    Qingdao Univ Lab Fiber Mat &

    Modern Text Growing Base State Key Lab Qingdao 266071 Peoples R China;

    Qingdao Univ Lab Fiber Mat &

    Modern Text Growing Base State Key Lab Qingdao 266071 Peoples R China;

    Qingdao Univ Lab Fiber Mat &

    Modern Text Growing Base State Key Lab Qingdao 266071 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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