Kinetics, thermodynamics and isotherm studies of malachite green adsorption by modified orange peel
Abstract
Kinetics, thermodynamics and isotherm studies of malachite green (MG) adsorption by orange peel (OP) modified with ethanol, calcium chloride and sodium hydroxide were performed. Effects of initial dye concentration, temperature and pH on the adsorption were studied at the different contact times. The amounts of MG adsorbed onto OP increased with increasing contact time, initial dye concentration, solution temperature, and pH. Maximum dye adsorption was about 92.90% under all the experimental conditions. Percent desorption of MG from the surface of OP was lower in the alkali and HCl solutions and higher in an acetone-water mixture of 50%. Adsorption kinetics was best fit the pseudo-second order model with correlation coefficients of 0.99 and 1 for the concentrations studied. Thermodynamic results indicated a spontaneous adsorption. Adsorption isotherm obeyed the Langmuir model. The Langmuir adsorption capacity was determined as 14.55 mg g-1. FT-IR and SEM analyses were also recorded before and after the adsorption.
Keywords
References
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Details
Primary Language
English
Subjects
Environmental Engineering, Chemical Engineering
Journal Section
Research Article
Authors
Leyla Kule
0000-0002-2222-9186
Türkiye
Bilal Acemioğlu
0000-0002-0728-2747
Türkiye
Evrim Baran
0000-0003-3551-8451
Türkiye
Publication Date
November 27, 2017
Submission Date
October 17, 2017
Acceptance Date
November 25, 2017
Published in Issue
Year 2017 Volume: 1 Number: 1
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