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Falyouna, O.*; Idham, M. F.*; Maamoun, I.; Bensaida, K.*; Ashik, U. P. M.*; 杉原 裕司*; Eljamal, O.*
Journal of Molecular Liquids, 359, p.119323_1 - 119323_20, 2022/08
被引用回数:37 パーセンタイル:99.49(Chemistry, Physical)Water contamination by ciprofloxacin (CIP) is a global and emerging issue because it increases the risk of infection by antimicrobial resistant bacteria. CIP removal from water by iron nanoparticles (Fe) with the presence of oxalate hasn't been reported yet. The present study demonstrated that the addition of oxalate to Fe nanoparticles improved the removal of CIP under the following optimum conditions: dose = 0.3 g L, oxalate = 0.3 mM, initial pH = 7, and temperature = 25 C. Furthermore, the experimental results illustrated that high concentrations of dissolved oxygen in the aqueous solution greatly decreased the removal efficiency of CIP by Fe oxalate system. In addition, the desorption experiments and the results of SEM-EDS, XRD, and FTIR revealed that physisorption and chemisorption were responsible for CIP removal by Fe oxalate system as the addition of 0.3 mM of oxalate boosted the surface complexation between Fe nanoparticles and the carboxylic, ketone, and piperazinyl groups in CIP. These results were supported by the outcomes of kinetics, isotherm, and thermodynamic analysis. Finally, this study proved that Fe oxalate system is inexpensive, practical, and more efficient than most of the reported Fe-based systems with a maximum adsorption capacity of 294.66 mg g.
Falyouna, O.*; Bensaida, K.*; Maamoun, I.; Ashik, U. P. M.*; 田原 淳士*; 田中 万也; 青柳 登; 杉原 裕司*; Eljamal, O.*
Journal of Cleaner Production, 342, p.130949_1 - 130949_15, 2022/03
被引用回数:42 パーセンタイル:98.89(Green & Sustainable Science & Technology)The antibiotic ciprofloxacin is recognized as a contaminant of emerging concern because its persistent occurrence in water accelerates the growth of deadly antimicrobial resistance genes. For the first time, the conventional precipitation technique was thermally modified to produce hybrid magnesium hydroxide/magnesium oxide nanorods for efficient and rapid adsorption of CIP from water. The successful synthesis was confirmed by the outcomes of TEM, EDS, XRD, and FTIR analysis. Mg(OH)/MgO exhibited an extraordinary capability to adsorb CIP from water regardless of CIP initial concentration under neutral pH and room temperature. FTIR analysis for the spent Mg(OH)/MgO revealed that bridging complexation with carboxylic group and electrostatic attraction with the positive amine group are the responsible mechanisms for CIP adsorption by Mg(OH)/MgO. Moreover, simulated CIP-contaminated river water was efficiently treated by Mg (OH)/MgO which proves the promising performance of Mg(OH)/MgO in field scale applications.