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.
|Number of pages||8|
|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||2013 International Conference on Biomedical Engineering and Environmental Engineering|
|Abbreviated title||ICBEEE 2013|
|Period||12/1/13 → 12/2/13|
Ntuli, F., Falayi, T., & Harmse, L. (2014). Immobilisation of Co, Fe, and Mn from acid mine drainage using activated bentonite. 267-274. Paper presented at 2013 International Conference on Biomedical Engineering and Environmental Engineering, .