In the present study, novel ionic liquid-impregnated chitosan hydrogel beads (CS-TCMA) were fabricated via the reaction of tricaprylmethylammonium chloride (TCMA, Aliquat-336) with the chitosan's amino groups. They were used for the fast adsorption of Tetracycline (TC), as a pharmaceutical compound model, from aqueous solution. It was found that the impregnation of TCMA greatly improved the adsorption behaviour of chitosan toward TC. The optimum adsorbent was determined to be 3 mg/ L in a wide pH range of 5-11. It was a fast process, with a 90% removal efficiency in <45 min. The adsorption kinetic of TC on the CS-TCMA was well described by the pseudo-first-order model and intra-particle diffusion model. The adsorption also obeyed the Langmuir adsorption isotherm model and the maximum adsorption capacity obtained was 22.42 mg/g at 45 °C. The thermodynamic study also revealed the endothermic nature of the process. The adsorption mechanism was also studied.

中文翻译：

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使用三辛基甲基氯化铵共轭壳聚糖水凝胶微珠有效去除四环素的吸附：机理，动力学，等温线和热力学研究。

在本研究中，通过三辛基甲基氯化铵（TCMA，Aliquat-336）与壳聚糖的氨基反应，制备了新型的离子液体浸渍的壳聚糖水凝胶珠（CS-TCMA）。它们用于从水溶液中快速吸附四环素（TC），作为药物化合物模型。发现TCMA的浸渍极大地改善了壳聚糖对TC的吸附行为。在5-11的宽pH范围内确定最佳吸附剂为3 mg / L。这是一个快速的过程，在不到45分钟的时间内去除率达到90％。TC在CS-TCMA上的吸附动力学可以通过拟一阶模型和颗粒内扩散模型很好地描述。吸附也遵循Langmuir吸附等温线模型，并且在45℃下获得的最大吸附容量为22.42mg / g。热力学研究还揭示了该过程的吸热性质。还研究了吸附机理。