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

F. Ntuli, T. Falayi, L. Harmse

Research output: Contribution to conferencePaper

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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