Phosphate Removal from Aqueous Solution Using Fly Ash Modified with Magnetic Fe-Zn Bimetal Oxide

In this work the adsorption of phosphate using the magnetic Fe-Zn bimetal oxide modified fly ash was studied. The experimental results showed that the effective pH range for the adsorption of phosphate was between 3.0 and 9.0. The removal percentage of phosphate reached maximum at pH 8.0. Kinetic study showed that the phosphate adsorption was well described by pseudo second order model. The removal efficiency of phosphate increased with the increase of adsorbent dosage and the decrease of the initial concentration. The adsorption of phosphate could be described well by Langmuir isotherm, the Langmuir constant Q0 was 24.15mg/g.