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

被引：58
作者：
Mangwandi, Chirangano [1 ]
Albadarin, Ahmad B. [1 ]
Glocheux, Yoann [1 ]
Walker, Gavin M. [1 ,2 ]
机构：
[1] Queens Univ Belfast, Sch Chem & Chem Engn, Belfast BT9 5AG, Antrim, North Ireland
[2] Univ Limerick, Mat Surface Sci Inst, Dept Chem & Environm Sci, Limerick, Ireland
来源：
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2014年 / 2卷 / 02期
关键词：
Phosphate nutrient; Phosphate adsorption; Dolomite; Wastewater treatment;
D O I：
10.1016/j.jece.2014.04.010
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
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. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1123 / 1130
页数：8
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