Study on Phosphate Removal from Water Using Adsorbent Synthesized from Spent Zn-Mn Battery

The adsorbent synthesized from spent Zn-Mn battery was used to purify phosphate from aqueous solution. From the results it could be seen that pH value affected phosphate removal significantly, optimum pH in the purification process was 8.0. The removal rate of phosphate increased when the adsorbent dosage improved. The reaction process was fast and the purification ratio could reach 96.2% for 10 minutes. The adsorption isotherm of phosphate purification fitted Langmuir equation and Freundlich equation. The Q0 value in Langmuir equation was 56.82 mg/g and the n value in Freundlich equation was 3.61. From spent Zn-Mn battery effective adsorbent for phosphate removal could be synthesized.