Immobilisation of Co, Fe, and Mn from acid mine drainage using activated bentonite

Freeman Ntuli; Thabo Falayi; Lucia Harmse

doi:10.2495/ICBEEE20130341

Immobilisation of Co, Fe, and Mn from acid mine drainage using activated bentonite

Freeman Ntuli, Thabo Falayi, Lucia Harmse

Civil Engineering Technology

University of Johannesburg

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

The potential use of activated bentonite as an adsorbent for heavy metals in acid mine drainage (AMD) was investigated. The activated bentonite was characterized as sodium bentonite. 1% solid loading was not effective in neutralization and metal removal. 5% solid loading could neutralize AMD as pH increased from 2.08 to 7.88 after 3 h accompanied with 94.00% Co, 99.88% Fe, and 90.93% Mn removal from AMD. The adsorption process followed the Langmuir isotherm and pseudo second order kinetic models. The maximum adsorption capacities were 0.019, 10.00, 0.441 mg/g for Co, Fe, and Mn, respectively. Co and Fe adsorption were thermodynamically spontaneous while Mn adsorption was not thermodynamically spontaneous.

Original language	English
Title of host publication	Biomedical Engineering and Environmental Engineering
Pages	267-274
Number of pages	8
DOIs	https://doi.org/10.2495/ICBEEE20130341
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
Bentonite
Heavy metal removal

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/ICBEEE20130341

Cite this

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title = "Immobilisation of Co, Fe, and Mn from acid mine drainage using activated bentonite",

abstract = "The potential use of activated bentonite as an adsorbent for heavy metals in acid mine drainage (AMD) was investigated. The activated bentonite was characterized as sodium bentonite. 1% solid loading was not effective in neutralization and metal removal. 5% solid loading could neutralize AMD as pH increased from 2.08 to 7.88 after 3 h accompanied with 94.00% Co, 99.88% Fe, and 90.93% Mn removal from AMD. The adsorption process followed the Langmuir isotherm and pseudo second order kinetic models. The maximum adsorption capacities were 0.019, 10.00, 0.441 mg/g for Co, Fe, and Mn, respectively. Co and Fe adsorption were thermodynamically spontaneous while Mn adsorption was not thermodynamically spontaneous.",

keywords = "Acid mine drainage, Adsorption, Bentonite, Heavy metal removal",

author = "Freeman Ntuli and Thabo Falayi and Lucia Harmse",

year = "2014",

doi = "10.2495/ICBEEE20130341",

language = "English",

isbn = "9781845648657",

series = "WIT Transactions on the Built Environment",

pages = "267--274",

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 & Harmse, L 2014, Immobilisation of Co, Fe, and Mn from acid mine drainage using activated bentonite. in Biomedical Engineering and Environmental Engineering. WIT Transactions on the Built Environment, vol. 145, pp. 267-274, 2013 International Conference on Biomedical Engineering and Environmental Engineering, ICBEEE 2013, Singapore, 1/12/13. https://doi.org/10.2495/ICBEEE20130341

TY - GEN

T1 - Immobilisation of Co, Fe, and Mn from acid mine drainage using activated bentonite

AU - Ntuli, Freeman

AU - Falayi, Thabo

AU - Harmse, Lucia

PY - 2014

Y1 - 2014

N2 - The potential use of activated bentonite as an adsorbent for heavy metals in acid mine drainage (AMD) was investigated. The activated bentonite was characterized as sodium bentonite. 1% solid loading was not effective in neutralization and metal removal. 5% solid loading could neutralize AMD as pH increased from 2.08 to 7.88 after 3 h accompanied with 94.00% Co, 99.88% Fe, and 90.93% Mn removal from AMD. The adsorption process followed the Langmuir isotherm and pseudo second order kinetic models. The maximum adsorption capacities were 0.019, 10.00, 0.441 mg/g for Co, Fe, and Mn, respectively. Co and Fe adsorption were thermodynamically spontaneous while Mn adsorption was not thermodynamically spontaneous.

AB - The potential use of activated bentonite as an adsorbent for heavy metals in acid mine drainage (AMD) was investigated. The activated bentonite was characterized as sodium bentonite. 1% solid loading was not effective in neutralization and metal removal. 5% solid loading could neutralize AMD as pH increased from 2.08 to 7.88 after 3 h accompanied with 94.00% Co, 99.88% Fe, and 90.93% Mn removal from AMD. The adsorption process followed the Langmuir isotherm and pseudo second order kinetic models. The maximum adsorption capacities were 0.019, 10.00, 0.441 mg/g for Co, Fe, and Mn, respectively. Co and Fe adsorption were thermodynamically spontaneous while Mn adsorption was not thermodynamically spontaneous.

KW - Acid mine drainage

KW - Adsorption

KW - Bentonite

KW - Heavy metal removal

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U2 - 10.2495/ICBEEE20130341

DO - 10.2495/ICBEEE20130341

M3 - Conference contribution

AN - SCOPUS:84897858894

SN - 9781845648657

T3 - WIT Transactions on the Built Environment

SP - 267

EP - 274

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 -

Immobilisation of Co, Fe, and Mn from acid mine drainage using activated bentonite

Abstract

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Keywords

ASJC Scopus subject areas

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