Ofloxacin adsorption by activated carbon derived from luffa sponge: Kinetic, isotherm, and thermodynamic analyses

Kong, Q, He, X, Shu, L and Miao, M 2017, 'Ofloxacin adsorption by activated carbon derived from luffa sponge: Kinetic, isotherm, and thermodynamic analyses', Process Safety and Environmental Protection, vol. 112, pp. 254-264.


Document type: Journal Article
Collection: Journal Articles

Title Ofloxacin adsorption by activated carbon derived from luffa sponge: Kinetic, isotherm, and thermodynamic analyses
Author(s) Kong, Q
He, X
Shu, L
Miao, M
Year 2017
Journal name Process Safety and Environmental Protection
Volume number 112
Start page 254
End page 264
Total pages 11
Publisher Elsevier
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 834.008 m 2 /g and the average pore diameter was 5.35 nm. AC adsorbed 96% of OFL at a concentration of 30 mg/L, and the maximum amount of OFL adsorbed was about 132 mg/g. The AC adsorption kinetic data fitted a pseudo-second-order model (R 2 = 0.9997) well, indicating chemisorption control. The experimental data at 308 K best fitted the Freundlich isotherm equation (R 2 = 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 30 mg/L, temperature 293 K, and AC dosage 0.5 g/L. Fourier-transform infrared spectroscopy showed that phosphorus-containing functional groups, and C[dbnd]O, C-O-C, and C[dbnd] C bonds were present on the AC surface.
Subject Applied Mathematics not elsewhere classified
Chemical Engineering not elsewhere classified
Maritime Engineering not elsewhere classified
Keyword(s) Activated carbon
Adsorption
Isotherm
Kinetics
Luffa sponge
Ofloxacin
DOI - identifier 10.1016/j.psep.2017.05.011
Copyright notice © 2017 Institution of Chemical Engineers
ISSN 0957-5820
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