Chitosan grafted SiO2–Fe3O4 nanoparticles for removal of antibiotics from water
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The antibiotic wastes in environment are very dangerous for human being because of the spread of epidemics due to increasing of the antibiotic-resistant bacteria. For reducing the proliferation of these bacteria, an environmental-friendly, cheap and non-toxic adsorbent, chitosan-grafted SiO2/Fe3O4, was developed in this study. The chitosan-grafted SiO2/Fe3O4 (Chi-SiO2/Fe3O4) nanoparticles were prepared and characterised by different physical and chemical techniques such as X-ray diffraction spectroscopy (XRD), Fourier transform infrared spectroscopy (FTIR), N2 adsorption-desorption isotherms (BET), thermogravimetric analysis (TGA), vibrating sample magnetometer (VSM), scanning electron microscopy (SEM) and zeta-potential analysis. The prepared nanoparticles were used for ciprofloxacin (CPX) adsorption from water. The nonlinear Langmuir and Freundlich isotherms were applied to experimental data. And Langmuir isotherm showed the best fit. The nonlinear pseudo-first-order and pseudo-second-order kinetic models and Weber-Morris intraparticle diffusion model were applied to kinetic data. The adsorption process followed the pseudo-second-order kinetic model. And the rate-limiting step was intraparticle diffusion step. The most suitable eluent for CPX desorption was determined as phosphate buffer solution rather than ethanol, and NaCl solution. It desorbed the 100% of CPX solution in 5 h.
KeywordsCiprofloxacin Adsorption SiO2 Chitosan Magnetic materials
This study was supported by the Scientific and Technological Research Council of Turkey (TUBITAK, Project no. 213 M376).
- Freundlich H (1906) Adsorption in solids. Z Phys Chem 57:385–470Google Scholar
- Frieden T (2013) Antibiotic resistance threats in the United States, 2013 | antibiotic/antimicrobial resistance report. In: U.S. Dep. Heal. Hum. Serv. Centers Dis. Control Prev. https://www.cdc.gov/drugresistance/threat-report-2013/. Accessed 30 Mar 2018
- Khan A, Wang J, Li J, Wang X, Chen Z, Alsaedi A, Hayat T, Chen Y, Wang X (2017) The role of graphene oxide and graphene oxide-based nanomaterials in the removal of pharmaceuticals from aqueous media: a review. Environ Sci Pollut Res 24:7938–7958. https://doi.org/10.1007/s11356-017-8388-8 CrossRefGoogle Scholar
- Kumar A, Kumar A, Sharma G, Naushad M, Stadler FJ, Ghfar AA, Dhiman P, Saini RV (2017) Sustainable nano-hybrids of magnetic biochar supported g-C3N4/FeVO4 for solar powered degradation of noxious pollutants—synergism of adsorption, photocatalysis & photo-ozonation. J Clean Prod 165:431–451. https://doi.org/10.1016/J.JCLEPRO.2017.07.117 CrossRefGoogle Scholar
- Peng X, Hu F, Huang J, Wang Y, Dai H, Liu Z (2016) Preparation of a graphitic ordered mesoporous carbon and its application in sorption of ciprofloxacin: kinetics, isotherm, adsorption mechanisms studies. Microporous Mesoporous Mater 228:196–206. https://doi.org/10.1016/j.micromeso.2016.03.047 CrossRefGoogle Scholar
- Ventola CL (2015) The antibiotic resistance crisis: part 1: causes and threats. Pharm Ther 40:277–283Google Scholar
- Weber WJ, Morris JC (1963) Kinetics of adsorption on carbon from solution. J Santi Eng Div ASCE 89:31–59Google Scholar