Removal of ortho-phosphate from aqueous solution by adsorption onto dolomite

Chirangano Mangwandi; Ahmad B. Albadarin; Yoann Glocheux; Gavin M. Walker

doi:10.1016/j.jece.2014.04.010

Removal of ortho-phosphate from aqueous solution by adsorption onto dolomite

Chirangano Mangwandi^*, Ahmad B. Albadarin, Yoann Glocheux, Gavin M. Walker

^*Corresponding author for this work

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Abstract

An experimental study on the adsorption of phosphate onto cost effective fine dolomite powder is presented. The effect of solution pH, solution ionic strength and adsorption isotherm were examined. The adsorption of phosphate was pH dependent and phosphate adsorption favoured acidic conditions. The adsorption was significantly influenced by solution ionic strength indicating outer-sphere complexation reactions. The experimental data further indicated that the removal of phosphate increased with increase in the ionic strength of solution. The experimental data were modelled with different isotherms: Langmuir, Freundlich and Redlich–Peterson isotherms. It was found that the Redlich–Peterson isotherm depicted the equilibrium data most accurately. The overall kinetic data fitted very well the pseudo-first-order rate model.

Original language	English
Pages (from-to)	1123-1130
Number of pages	8
Journal	Journal of Environmental Chemical Engineering
Volume	2
Issue number	2
Early online date	18 Apr 2014
DOIs	https://doi.org/10.1016/j.jece.2014.04.010
Publication status	Published - Jun 2014

Keywords

Phosphate nutrient
Phosphate adsorption
Dolomite
waste water treatment

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10.1016/j.jece.2014.04.010

Removal of ortho-phosphate from aqueous solution by adsorption onto dolomite
This is the author’s version of a work that was accepted for publication in Journal of Environmental Chemical Engineering. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Environmental Chemical Engineering, vol 2, issue 2, June 2014. DOI:10.1016/j.jece.2014.04.010
Accepted author manuscript, 2.91 MB

http://www.sciencedirect.com/science/article/pii/S2213343714000839#

Chirangano Mangwandi
- c.mangwandiqub.acuk
Person: Academic

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@article{887034ba8aa040809cd07827211f55ca,

title = "Removal of ortho-phosphate from aqueous solution by adsorption onto dolomite",

abstract = "An experimental study on the adsorption of phosphate onto cost effective fine dolomite powder is presented. The effect of solution pH, solution ionic strength and adsorption isotherm were examined. The adsorption of phosphate was pH dependent and phosphate adsorption favoured acidic conditions. The adsorption was significantly influenced by solution ionic strength indicating outer-sphere complexation reactions. The experimental data further indicated that the removal of phosphate increased with increase in the ionic strength of solution. The experimental data were modelled with different isotherms: Langmuir, Freundlich and Redlich–Peterson isotherms. It was found that the Redlich–Peterson isotherm depicted the equilibrium data most accurately. The overall kinetic data fitted very well the pseudo-first-order rate model. ",

keywords = "Phosphate nutrient, Phosphate adsorption, Dolomite, waste water treatment",

author = "Chirangano Mangwandi and Albadarin, {Ahmad B.} and Yoann Glocheux and Walker, {Gavin M.}",

year = "2014",

month = jun,

doi = "10.1016/j.jece.2014.04.010",

language = "English",

volume = "2",

pages = "1123--1130",

journal = "Journal of Environmental Chemical Engineering",

issn = "2213-3437",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Removal of ortho-phosphate from aqueous solution by adsorption onto dolomite

AU - Mangwandi, Chirangano

AU - Albadarin, Ahmad B.

AU - Glocheux, Yoann

AU - Walker, Gavin M.

PY - 2014/6

Y1 - 2014/6

N2 - An experimental study on the adsorption of phosphate onto cost effective fine dolomite powder is presented. The effect of solution pH, solution ionic strength and adsorption isotherm were examined. The adsorption of phosphate was pH dependent and phosphate adsorption favoured acidic conditions. The adsorption was significantly influenced by solution ionic strength indicating outer-sphere complexation reactions. The experimental data further indicated that the removal of phosphate increased with increase in the ionic strength of solution. The experimental data were modelled with different isotherms: Langmuir, Freundlich and Redlich–Peterson isotherms. It was found that the Redlich–Peterson isotherm depicted the equilibrium data most accurately. The overall kinetic data fitted very well the pseudo-first-order rate model.

AB - An experimental study on the adsorption of phosphate onto cost effective fine dolomite powder is presented. The effect of solution pH, solution ionic strength and adsorption isotherm were examined. The adsorption of phosphate was pH dependent and phosphate adsorption favoured acidic conditions. The adsorption was significantly influenced by solution ionic strength indicating outer-sphere complexation reactions. The experimental data further indicated that the removal of phosphate increased with increase in the ionic strength of solution. The experimental data were modelled with different isotherms: Langmuir, Freundlich and Redlich–Peterson isotherms. It was found that the Redlich–Peterson isotherm depicted the equilibrium data most accurately. The overall kinetic data fitted very well the pseudo-first-order rate model.

KW - Phosphate nutrient

KW - Phosphate adsorption

KW - Dolomite

KW - waste water treatment

U2 - 10.1016/j.jece.2014.04.010

DO - 10.1016/j.jece.2014.04.010

M3 - Article

AN - SCOPUS:84899507623

SN - 2213-3437

VL - 2

SP - 1123

EP - 1130

JO - Journal of Environmental Chemical Engineering

JF - Journal of Environmental Chemical Engineering

IS - 2

ER -

Removal of ortho-phosphate from aqueous solution by adsorption onto dolomite

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