Removal of Phosphate from Aqueous Solution Using Alginate/Iron (III) Chloride Capsules: a Laboratory Study

摘要: Binding phosphate at participation of alginate/FeCl3 capsules was studied with laboratory experiments. The hydrogel microcapsules were obtained the dropping-in method, by gelation sodium alginate water solution iron (III) chloride solution. Phosphate adsorption characteristics in a static batch system respect to changes contact time, initial phosphates concentration, pH solution, and temperature. After 24 h tests, average 87.5% ions removed from natural solutions; after 48 h, an equilibrium reached. data well fit Freundlich isotherm model. Parameter k isotherms amounted 43.4 104.7, whereas parameter n 0.362 0.476. course processes desorption aquatic phase, as pH, suggests that is major mechanism removal, simultaneously, but much lower degree, process precipitation released takes its place. Parameters calculated equation show using several times smaller amounts iron, it possible remove similar or bigger phosphorus than other adsorbents containing iron. adsorbent removes wide spectrum—from 4 10. Results suggest proposed has potential remediation contaminated waters phosphate.