Adsorption kinetics,isotherms and mechanisms of three-component covalent organic polymer/sodium alginate beads for ciprofloxacin removal from aqueous solution |
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| Authors: | Can Shi Yuyang Bai Fangyuan Zhang Yangxue Li Junhong Gu Aiyuan Jia Zhi Liu Zhisheng Liu Mei Hong |
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| Institution: | 1. Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun, P. R. China;2. International Joint Research Laboratory of Nano-Micro Architecture Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun, P. R. China;3. School of Municipal and Environmental Engineering, Jilin Jianzhu University, Changchun, P. R. China |
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| Abstract: | Ciprofloxacin (CIP), an important representative fluoroquinolone antibiotic, has been frequently detected in water sources, thus threatening aquatic organisms and human health. In this work, a porous three-component covalent organic polymer (SLEL-6) was synthesized through multi-component (MC) reaction systems for adsorptive removal of CIP from aqueous solution, followed by an encapsulation process to achieve SLEL-6/sodium alginate (SA) beads with boosted adsorption ability, reusability and recyclability. By virtue of the hierarchical porous natures, functional groups as well as π-rich skeletons, SLEL-6 and SLEL-6/SA beads could deal with CIP contamination effectively. Moreover, the adsorption isotherms of CIP by SLEL-6 and SLEL-6/SA beads follow the Langmuir model showing high theoretical maximum adsorption capacities of 57.47 and 163.93 mg g−1, respectively. Furthermore, the plausible mechanisms are proposed according to experimental studies of influencing factors, coupled with characterizations before and after adsorption. This work therefore highlighting the immense potential of COP-based SA composite beads as new-type globular adsorbents for eliminating fluoroquinolones from aqueous solution. |
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| Keywords: | adsorption CIP antibiotics covalent organic polymer isotherms kinetics |
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