Modification of a magnetic carbon composite for ciprofloxacin adsorption
| Autor: | Jian-Ying Lin, Jun Ren, Zengshuang Wang, Shikui Wang, Haixin Mao |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Environmental Engineering
Materials science Scanning electron microscope Composite number 02 engineering and technology 010501 environmental sciences 01 natural sciences Waste Disposal Fluid symbols.namesake Magnetics Adsorption Ciprofloxacin Desorption Environmental Chemistry Humic acid Fourier transform infrared spectroscopy Inert gas Humic Substances 0105 earth and related environmental sciences General Environmental Science chemistry.chemical_classification Chromatography Osmolar Concentration Langmuir adsorption model General Medicine Hydrogen-Ion Concentration 021001 nanoscience & nanotechnology Carbon Kinetics chemistry Chemical engineering symbols Thermodynamics 0210 nano-technology Water Pollutants Chemical |
| Zdroj: | Journal of environmental sciences (China). 49 |
| ISSN: | 1001-0742 |
| Popis: | A magnetic carbon composite, Fe3O4/C composite, was fabricated by one-step hydrothermal synthesis, modified by heat treatment under an inert atmosphere (N2), and then used as an adsorbent for ciprofloxacin (CIP) removal. Conditions for the modification were optimized according to the rate of CIP removal. The adsorbent was characterized by Fourier transform infrared spectroscopy, X-ray diffraction measurements, vibrating-sample magnetometry, scanning electron microscopy, transmission electron microscopy, and N2 adsorption/desorption isotherm measurements. The results indicate that the modified adsorbent has substantial magnetism and has a large specific area, which favor CIP adsorption. The effects of solution pH, adsorbent dose, contact time, initial CIP concentration, ion strength, humic acid and solution temperature on CIP removal were also studied. Our results show that all of the above factors influence CIP removal. The Langmuir adsorption isotherm fits the adsorption process well, with the pseudo second-order model describing the adsorption kinetics accurately. The thermodynamic parameters indicate that adsorption is mainly physical adsorption. Recycling experiments revealed that the behavior of adsorbent is maintained after recycling for five times. Overall, the modified magnetic carbon composite is an efficient adsorbent for wastewater treatment. |
| Databáze: | OpenAIRE |
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