Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6974325 | Process Safety and Environmental Protection | 2017 | 51 Pages |
Abstract
Ofloxacin (OFL) removal from aqueous solution by carbon activated made from luffa sponge was studied. Scanning electron microscopy showed that the activated carbon (AC) surface was rough. The AC surface area was 834.008Â m2/g and the average pore diameter was 5.35Â nm. AC adsorbed 96% of OFL at a concentration of 30Â mg/L, and the maximum amount of OFL adsorbed was about 132Â mg/g. The AC adsorption kinetic data fitted a pseudo-second-order model (R2Â =Â 0.9997) well, indicating chemisorption control. The experimental data at 308Â K best fitted the Freundlich isotherm equation (R2Â =Â 0.9912), indicating multilayer adsorption. A thermodynamic simulation showed that adsorption was spontaneous and exothermic. The optimal conditions for OFL adsorption were pH 6, initial OFL concentration 30Â mg/L, temperature 293Â K, and AC dosage 0.5Â g/L. Fourier-transform infrared spectroscopy showed that phosphorus-containing functional groups, and CO, COC, and CC bonds were present on the AC surface.
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Authors
Qiang Kong, Xiao He, Li Shu, Ming-sheng Miao,