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

Journal article

Authors / Editors

Ntuli, Freeman

Research Areas

ENGINEERING AND TECHNOLOGY (Frascati classification)

Publication Details

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

Author list: Ntuli, Freeman

Publisher: SAGE Publications (UK and US) / Wiley: No OnlineOpen

Publication year: 2014

Journal: Waste Management & Research : The Journal for a Sustainable Circular Economy (0734-242X)

Start page: 267

End page: 274

Number of pages: 8

ISSN: 0734-242X

eISSN: 1096-3669

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84897858894&doi=10.2495/ICBEEE20130341∂nerID=40&md5=1051e15f54f0dd1ed0499f0b817ad287

Languages: English-United States (EN-US)

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.

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