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

F. Ntuli, T. Falayi, L. Harmse

Research output: Contribution to conferencePaperpeer-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. © 2014 WIT Press.
Original languageEnglish
Pages267-274
Number of pages8
Publication statusPublished - 2014
Event2013 International Conference on Biomedical Engineering and Environmental Engineering -
Duration: Dec 1 2013Dec 2 2013
Conference number: 1

Conference

Conference2013 International Conference on Biomedical Engineering and Environmental Engineering
Abbreviated titleICBEEE 2013
Period12/1/1312/2/13

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