<abstract xmlns="http://www.w3.org/1999/xhtml">Adsorption of 8-hydroxyquinoline (8HQ) on powdered orange peel (POP), a locally available adsorbent, has been studied. Experiment was performed on different 8HQ concentration, particle size, and adsorbent dosage. The Langmuir and Freundlich adsorption isotherm model has been tested. The obtained results best fitted the Langmuir model, suggesting monolayer adsorption of 8HQ on POP. The kinetic studies for the adsorption process were also carried out using pseudo-first- and pseudo-second-order models, and the data obtained is best fitted to the pseudo-second-order kinetic model. Thermodynamic parameters were calculated for the adsorption process and the result showed that the values of ΔGads, ΔHads, and ΔSads are −1171.4J/mol, −140J/mol and −40.5 J/K at 303 K. Thus, it can be summarized that the adsorption of 8HQ is spontaneous, chemisorbed, monolayer, and exothermic</abstract>

Adsorption of 8-hydroxyquinoline (8HQ) on powdered orange peel (POP), a locally available adsorbent, has been studied. Experiment was performed on different 8HQ concentration, particle size, and adsorbent dosage. The Langmuir and Freundlich adsorption isotherm model has been tested. The obtained results best fitted the Langmuir model, suggesting monolayer adsorption of 8HQ on POP. The kinetic studies for the adsorption process were also carried out using pseudo-first- and pseudo-second-order models, and the data obtained is best fitted to the pseudo-second-order kinetic model. Thermodynamic parameters were calculated for the adsorption process and the result showed that the values of ΔGads, ΔHads, and ΔSads are −1171.4J/mol, −140J/mol and −40.5 J/K at 303 K. Thus, it can be summarized that the adsorption of 8HQ is spontaneous, chemisorbed, monolayer, and exothermic

8-Hydroxyqunoline adsorption from aqueous solution using powdered orange peel: kinetic and isotherm study

Department of Chemistry, College of Natural Sciences, Jimma University, P.O. Box 378, Jimma, Ethiopia

Acta Universitatis Sapientiae, Agriculture and Environment

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Adsorption of 8-hydroxyquinoline (8HQ) on powdered orange peel (POP), a locally available adsorbent, has been studied. Experiment was performed on different...

8-Hydroxyqunoline adsorption from aqueous solution using powdered orange peel: kinetic and isotherm study

Published Online: Dec 22, 2015

Page range: 36 - 46

Received: Mar 05, 2015

Accepted: Jun 02, 2015

DOI: https://doi.org/10.1515/ausae-2015-0003

Keywords
adsorption, 8-hydroxyquinoline, orange peel, isotherm model

© 2015 Khalid Siraj et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

8-Hydroxyqunoline adsorption from aqueous solution using powdered orange peel: kinetic and isotherm study

Published Online: Dec 22, 2015

Page range: 36 - 46

Received: Mar 05, 2015

Accepted: Jun 02, 2015

DOI: https://doi.org/10.1515/ausae-2015-0003

Keywordsadsorption, 8-hydroxyquinoline, orange peel, isotherm model

© 2015 Khalid Siraj et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
adsorption, 8-hydroxyquinoline, orange peel, isotherm model