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首页> 外文期刊>RSC Advances >Adsorption of tetracycline antibiotics from an aqueous solution onto graphene oxide/calcium alginate composite fibers
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Adsorption of tetracycline antibiotics from an aqueous solution onto graphene oxide/calcium alginate composite fibers

机译：四环素类抗生素从水溶液到氧化石墨烯/藻酸钙复合纤维上的吸附

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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 π–π interaction should serve as predominant contributions to the significantly enhanced adsorption capability.
机译：在这项研究中，我们报告了一种新型环保，高效吸附剂氧化石墨烯/海藻酸钙（GO / CA）复合纤维的制备方法，通过使用氯化钙作为交叉冷冻干燥方法氧化石墨烯和海藻酸钠之间的连接剂。 Langmuir模型预测GO / CA复合纤维的最大四环素吸附能力达到131.6μgg ？1 。通过溶液pH，吸附剂剂量，四环素的初始浓度和搅拌时间等几个参数研究了四环素在纤维上的吸附性能。用Langmuir和Freundlich吸附等温线研究吸附平衡。吸附过程的动力学是使用拟一级动力学方程和拟二级动力学方程预测的。此外，研究了吸附机理，发现氢键和π-π相互作用对显着提高吸附能力起主要作用。

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