A kinetic and thermodynamic study of sulphate removal from AMD using fly ash

F. Ntuli; T. Falayi; M. Mabatho

doi:10.2495/ICBEEE20130331

A kinetic and thermodynamic study of sulphate removal from AMD using fly ash

F. Ntuli, T. Falayi, M. Mabatho

Research output: Contribution to conference › Paper › peer-review

2 Citations (Scopus)

Abstract

Fly ash (FA) was used as an adsorbent for SO4 2- ions in pretreated AMD (i.e., after removal of heavy metals). The adsorption experiments were done using a thermostatic shaker at varying temperatures with a 50%, 33%, and 25% m/v FA solid loading. The 50% solid loading was chosen as the best as it removed 80% of SO4 2- ions after 24 h. The adsorption thermodynamics and kinetics were best modelled by the Temkin and pseudo first order kinetic models, respectively. Thermodynamic data showed that SO4 2- adsorption was thermodynamically spontaneous at 298.15, 308.15, and 318.15 K. Enthalpy and entropy energy values were 21.2 and 8.34 J/mole, respectively, indicating an endothermic process and an affinity for sulphate ions by FA. © 2014 WIT Press.

Original language	English
Pages	259-266
Number of pages	8
DOIs	https://doi.org/10.2495/ICBEEE20130331
Publication status	Published - 2014
Event	2013 International Conference on Biomedical Engineering and Environmental Engineering - Duration: Dec 1 2013 → Dec 2 2013 Conference number: 1

Conference

Conference	2013 International Conference on Biomedical Engineering and Environmental Engineering
Abbreviated title	ICBEEE 2013
Period	12/1/13 → 12/2/13

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title = "A kinetic and thermodynamic study of sulphate removal from AMD using fly ash",

abstract = "Fly ash (FA) was used as an adsorbent for SO4 2- ions in pretreated AMD (i.e., after removal of heavy metals). The adsorption experiments were done using a thermostatic shaker at varying temperatures with a 50%, 33%, and 25% m/v FA solid loading. The 50% solid loading was chosen as the best as it removed 80% of SO4 2- ions after 24 h. The adsorption thermodynamics and kinetics were best modelled by the Temkin and pseudo first order kinetic models, respectively. Thermodynamic data showed that SO4 2- adsorption was thermodynamically spontaneous at 298.15, 308.15, and 318.15 K. Enthalpy and entropy energy values were 21.2 and 8.34 J/mole, respectively, indicating an endothermic process and an affinity for sulphate ions by FA. {\textcopyright} 2014 WIT Press.",

author = "F. Ntuli and T. Falayi and M. Mabatho",

note = "Export Date: 19 June 2018; 2013 International Conference on Biomedical Engineering and Environmental Engineering, ICBEEE 2013 ; Conference date: 01-12-2013 Through 02-12-2013",

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doi = "10.2495/ICBEEE20130331",

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pages = "259--266",

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TY - CONF

T1 - A kinetic and thermodynamic study of sulphate removal from AMD using fly ash

AU - Ntuli, F.

AU - Falayi, T.

AU - Mabatho, M.

N1 - Conference code: 1

PY - 2014

Y1 - 2014

N2 - Fly ash (FA) was used as an adsorbent for SO4 2- ions in pretreated AMD (i.e., after removal of heavy metals). The adsorption experiments were done using a thermostatic shaker at varying temperatures with a 50%, 33%, and 25% m/v FA solid loading. The 50% solid loading was chosen as the best as it removed 80% of SO4 2- ions after 24 h. The adsorption thermodynamics and kinetics were best modelled by the Temkin and pseudo first order kinetic models, respectively. Thermodynamic data showed that SO4 2- adsorption was thermodynamically spontaneous at 298.15, 308.15, and 318.15 K. Enthalpy and entropy energy values were 21.2 and 8.34 J/mole, respectively, indicating an endothermic process and an affinity for sulphate ions by FA. © 2014 WIT Press.

AB - Fly ash (FA) was used as an adsorbent for SO4 2- ions in pretreated AMD (i.e., after removal of heavy metals). The adsorption experiments were done using a thermostatic shaker at varying temperatures with a 50%, 33%, and 25% m/v FA solid loading. The 50% solid loading was chosen as the best as it removed 80% of SO4 2- ions after 24 h. The adsorption thermodynamics and kinetics were best modelled by the Temkin and pseudo first order kinetic models, respectively. Thermodynamic data showed that SO4 2- adsorption was thermodynamically spontaneous at 298.15, 308.15, and 318.15 K. Enthalpy and entropy energy values were 21.2 and 8.34 J/mole, respectively, indicating an endothermic process and an affinity for sulphate ions by FA. © 2014 WIT Press.

U2 - 10.2495/ICBEEE20130331

DO - 10.2495/ICBEEE20130331

M3 - Paper

SP - 259

EP - 266

T2 - 2013 International Conference on Biomedical Engineering and Environmental Engineering

Y2 - 1 December 2013 through 2 December 2013

ER -

A kinetic and thermodynamic study of sulphate removal from AMD using fly ash

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