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One-, Two-, and Three-Parameter Isotherms, Kinetics, and Thermodynamic Evaluation of Co(II) Removal from Aqueous Solution Using Dead Neem Leaves
Joint Authors
Tsamo, Cornelius
Paltahe, Abba
Fotio, Daniel
Vincent, Tore Atangana
Sales, Wassansa Francois
Source
International Journal of Chemical Engineering
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-14, 14 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-11-27
Country of Publication
Egypt
No. of Pages
14
Abstract EN
Water pollution by heavy metals like Co(II) is particularly of concern because of their persistence in the environment, toxicity, and ability to bioaccumulate in organisms.
In this study, the influence of contact time at three initial concentration, pH, adsorbent dose, temperature, and kinetics, thermodynamics, and one-, two-, and three-parameter isotherm modeling of the adsorption of Co(II) on neem leaves (DNL) was investigated.
The adsorbent was characterized using FTIR, TGA-DSC, EDX, and nitrogen adsorption-desorption.
DNL is composed of many Co(II) surface-binding groups and a BET surface area of 0.2783 m2/g dominated by meso- and macropores.
Equilibrium was attained in 10 minutes for the three concentrations with a removal efficiency of 85–97%.
∆G° of −5.424 to −6.068 KJ/mol at 25 to 60°C, respectively, indicated spontaneous adsorption with increasing temperature.
D-R adsorption energies of 0.649 to 2.433 KJ/mol revealed physical adsorption.
Maximum adsorption capacity of 9.201–523.900 mg/g was obtained by Freundlich and Jovanovic isotherms.
Adsorption was very favourable as evident by the high Kiselev equilibrium constant (11.652–172.78 L/mg) and very low RL values of 0.001–0.026.
Adsorption occurred by repulsive mechanism as indicated by Fowler–Guggenheim and Hill–de Boer negative interaction energies (−16.182 to −90.163 and −111.102 to −3328.86 KJmol−1, respectively), confirming maximum Co(II) adsorption at pH 3.
Results can be used in the design of an efficient adsorption system using neem leaves which is very efficient in removing low and high levels of heavy metals like cobalt ions from wastewater.
American Psychological Association (APA)
Tsamo, Cornelius& Paltahe, Abba& Fotio, Daniel& Vincent, Tore Atangana& Sales, Wassansa Francois. 2019. One-, Two-, and Three-Parameter Isotherms, Kinetics, and Thermodynamic Evaluation of Co(II) Removal from Aqueous Solution Using Dead Neem Leaves. International Journal of Chemical Engineering،Vol. 2019, no. 2019, pp.1-14.
https://search.emarefa.net/detail/BIM-1158717
Modern Language Association (MLA)
Tsamo, Cornelius…[et al.]. One-, Two-, and Three-Parameter Isotherms, Kinetics, and Thermodynamic Evaluation of Co(II) Removal from Aqueous Solution Using Dead Neem Leaves. International Journal of Chemical Engineering No. 2019 (2019), pp.1-14.
https://search.emarefa.net/detail/BIM-1158717
American Medical Association (AMA)
Tsamo, Cornelius& Paltahe, Abba& Fotio, Daniel& Vincent, Tore Atangana& Sales, Wassansa Francois. One-, Two-, and Three-Parameter Isotherms, Kinetics, and Thermodynamic Evaluation of Co(II) Removal from Aqueous Solution Using Dead Neem Leaves. International Journal of Chemical Engineering. 2019. Vol. 2019, no. 2019, pp.1-14.
https://search.emarefa.net/detail/BIM-1158717
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1158717