Phosphate Removal Using Polyethylenimine Functionalized Silica-Based Materials

In water and wastewater, phosphate anions are considered critical contaminants because they cause algae blooms eutrophication. The present work aims at studying the removal of from aqueous solutions using silica particles functionalized with polyethylenimine. parameters affecting adsorption process such as pH, initial concentration, adsorbent dose, presence competitive anions, carbonate, nitrate, sulfate chromate ions, were studied. Equilibrium studies carried out to determine their sorption capacity rate ions uptake. isotherm data fitted well Langmuir Sips model. maximum was 41.1 mg/g pH 5, which decreased slightly 7. efficiency increased lower values by increasing dose. 80% for 5 75% 6, 73% 7 70% 8, concentration about 1 mg/L a dose 100 mg/L. increase For example, 4 40% 0.1 2.0 g/L adversely affected removal. Though also found be removed certain extent. Their co-removal provided an might very useful treating waters low-level multiple contaminant occurrence in natural or engineered aquatic systems.