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 - Dolomite
KW - Phosphate adsorption
KW - Phosphate nutrient
KW - Wastewater treatment
UR - http://www.scopus.com/inward/record.url?scp=84899507623&partnerID=8YFLogxK
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 -
