REMOVAL OF PHOSPHATE (PO43-) FROM AQUEOUS SOLUTION USING BIOCHAR DERIVED FROM PAPER SLUDGE

Abstract

The aim of this study was to produce adsorbent from paper sludge for removal contaminants in water that has great environmental significant in utilization of waste to solve waste. Paper sludge in Hoang Van Thu paper joint stock company was collected and cleaned with tap water and distilled water. Then, it was dried and crushed to particle size of 0.25 – 0.5 mm. Finally, the paper sludge powder was carbonized at 600 ^oC for 4 hours to create the biochar (BP). Batch adsorption experiment was carried out to investigate and evaluate the effect of some factors on phosphate (PO₄^3-) adsorption of BP material. The results expressed that the suitable conditions for phosphate adsorption of BP occurred at solution pH of 3, initial phosphate concentration of 20 mg/L and adsorption capacity can reach 3.04 mg/g at contact time 120 minutes. The paper sludge biochar shown pretty good adsorption capacity of phosphate in aqueous solution and can be become a promising adsorbent for removal of phosphate in wastewater.