Author/Authors :
Moradi, Ershad Department of Chemistry - Faculty of Science - Yazd University, Yazd, Iran , Haji Shabani, Ali Mohammad Department of Chemistry - Faculty of Science - Yazd University, Yazd, Iran , Dadfarnia, Shayessteh Department of Chemistry - Faculty of Science - Yazd University, Yazd, Iran , Emami, Saeed Department of Medicinal Chemistry and Pharmaceutical Sciences Research Center - Faculty of Pharmacy - Mazandaran University of Medical Sciences, Sari, Iran
Abstract :
Metal–organic framework sorbents [MIL-100(Fe), MOF-235(Fe)], Fe3O4 nanoparticles and metal–organic framework loaded on iron oxide nanoparticles [Fe3O4@MIL-100(Fe) and Fe3O4@MOF-235(Fe)] were prepared and examined for ciprofloxacin (CIP) removal. The results showed that sorption kinetics of CIP by Fe3O4@MIL-100(Fe) follows the Elovich and pseudo-second-order models indicating that the sorption is both chemisorption and physical adsorption, whereas the sorption to other sorbents occurs mainly by physical sorption. The sorption isotherm studies revealed that Langmuir model provided the best fit to all the experimental data. The thermodynamic studies showed that CIP removal is spontaneous (ΔG° = 2.28 kJ/mol) and endothermic (ΔH° = 18.39 kJ/mol). It was also found that among the sorbents investigated for CIP removal, Fe3O4@MIL-100(Fe) has the highest maximum monolayer adsorption capacity of 322.58 mg/g.
Keywords :
Langmuir isotherm , Metal–organic framework , Ciprofloxacin , Pharmaceutical removal , Magnetic nanoparticles
