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

Freeman Ntuli; Thabo Falayi; Moreroa Mabatho

doi:10.2495/ICBEEE20130331

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

Freeman Ntuli, Thabo Falayi, Moreroa Mabatho

Civil Engineering Technology

University of Johannesburg

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › 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.

Original language	English
Title of host publication	Biomedical Engineering and Environmental Engineering
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, ICBEEE 2013 - , Singapore Duration: 1 Dec 2013 → 2 Dec 2013

Publication series

Name	WIT Transactions on the Built Environment
Volume	145
ISSN (Print)	1743-3509

Conference

Conference	2013 International Conference on Biomedical Engineering and Environmental Engineering, ICBEEE 2013
Country/Territory	Singapore
Period	1/12/13 → 2/12/13

Keywords

Acid mine drainage
Adsorption
And isotherm
Sulphates

ASJC Scopus subject areas

Architecture
Civil and Structural Engineering
Building and Construction
Automotive Engineering
Safety, Risk, Reliability and Quality
Arts and Humanities (miscellaneous)
Transportation
Safety Research
Computer Science Applications

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10.2495/ICBEEE20130331

Cite this

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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.",

keywords = "Acid mine drainage, Adsorption, And isotherm, Sulphates",

author = "Freeman Ntuli and Thabo Falayi and Moreroa Mabatho",

year = "2014",

doi = "10.2495/ICBEEE20130331",

language = "English",

isbn = "9781845648657",

series = "WIT Transactions on the Built Environment",

pages = "259--266",

booktitle = "Biomedical Engineering and Environmental Engineering",

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

}

Ntuli, F, Falayi, T & Mabatho, M 2014, A kinetic and thermodynamic study of sulphate removal from AMD using fly ash. in Biomedical Engineering and Environmental Engineering. WIT Transactions on the Built Environment, vol. 145, pp. 259-266, 2013 International Conference on Biomedical Engineering and Environmental Engineering, ICBEEE 2013, Singapore, 1/12/13. https://doi.org/10.2495/ICBEEE20130331

TY - GEN

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

AU - Ntuli, Freeman

AU - Falayi, Thabo

AU - Mabatho, Moreroa

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.

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.

KW - Acid mine drainage

KW - Adsorption

KW - And isotherm

KW - Sulphates

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U2 - 10.2495/ICBEEE20130331

DO - 10.2495/ICBEEE20130331

M3 - Conference contribution

AN - SCOPUS:84897843259

SN - 9781845648657

T3 - WIT Transactions on the Built Environment

SP - 259

EP - 266

BT - Biomedical Engineering and Environmental Engineering

T2 - 2013 International Conference on Biomedical Engineering and Environmental Engineering, ICBEEE 2013

Y2 - 1 December 2013 through 2 December 2013

ER -

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

Abstract

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Keywords

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