氟喹诺酮类抗生素 - 左氧氟沙星的吸附研究,以评估利用天然沸石从废水中去除该抗生素的可能性

I. Rubashvili, M. Zautashvili, T. Kordzakhia, K. Ebralidze
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引用次数: 0

摘要

本研究首次在静态和动态条件下研究了天然沸石 - Clinoptilolite 及其酸改性形式对最常用的氟喹诺酮类抗生素 - 左氧氟沙星(在尿液中未代谢> 80%)的吸附去除效果。利用 Langmuir 吸附模型考察和评估了抗生素进水溶液的入口浓度、流速和 pH 值以及系统沸石/抗生素溶液的接触时间对吸附过程的影响。吸附机理主要是沸石表面与吸附剂左氧氟沙星之间的静电作用。这项研究表明并证明,天然沸石及其酸改性形式可以成为一种高效、环保、可替代且具有竞争力的吸附剂,在去除废水中的左氧氟沙星方面具有廉价性、选择性和吸附效力,可用于工业环境和废水处理厂的净化过程。
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Adsorption study of fluoroquinolone antibiotic - levofloxacin to evaluate the possibility of its removal from wastewaters using natural zeolite
The present work is the first case where the adsorptive removal of the most commonly used fluoroquinolone antibiotic - levofloxacin (> 80 % unmetabolized in the urine) from aqueous solution as a model of wastewater treatment plant effluent by natural zeolite – clinoptilolite and its acid-modified form has been investigated under static and dynamic conditions. The effect of the inlet concentration, the flow rate and the pH value of antibiotic influent solution, also, the contact time of system zeolite/antibiotic solution on the adsorption process were examined and evaluated using the Langmuir adsorption model. The adsorption mechanism mainly composed of electrostatic interaction between the zeolite surface and adsorbate - levofloxacin. This study demonstrates and proves that natural clinoptilolite and its acid-modified form could be an efficient, eco-friendly, alternative and competitive adsorbent in terms of cheapness, selectivity and adsorption efficacy for the removal of levofloxacin from wastewaters and implemented in an industrial setting and wastewater treatment plant for purification processes.
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