Phosphorus Adsorption onto an Industrial Acidified Laterite By‒Product: Equilibrium and Thermodynamic Investigation

摘要: The present research investigates the uptake of phosphate ions from aqueous solutions using acidified laterite (ALS), a by-product production ferric aluminium sulfate laterite. Phosphate adsorption experiments were performed in batch systems to determine amount adsorbed as function solution pH, adsorbent dosage and thermodynamic parameters per fixed P concentration. Kinetic studies also carried out study effect particle sizes. maximum removal capacity ALS observed at pH 5 was 3.68 mg P g−1. It found that increases, equilibrium pH decreases, so an 1.0 g L−1 selected. Adsorption (qm) calculated Langmuir isotherm be 2.73 mg g−1. experimental data mathematically well described pseudo first-order model over full range size. reactions endothermic, process favoured high temperature; ΔG ΔH values implied main mechanism onto is physisorption. desorption indicated need consider NaOH 0.1 M optimal for practical regeneration applications. © 2014 Curtin University Technology John Wiley & Sons, Ltd.