Research of phosphate removal from water on reverse osmotic filters

Eutrophication of natural water bodies caused by an excess biogenic substances is one the global environmental problems modern times. Usually, phosphorus a limiting element, concentration which determines intensity eutrophication processes in bodies. Therefore, it important to develop methods aimed at preventing excessive amounts phosphates from entering environment. To remove water, typically used biological degradation technologies, usually proceed very slowly and depend on conditions under process takes place. Also, Biogenic elements can be removed using ion exchange, reverse osmosis, chemical methods. However, disposal concentrated solutions becomes issue with these Baromembrane purification methods, particularly are becoming increasingly field treatment essential creating efficient low-waste complex technologies for compounds. The study investigated removing orthophosphates distilled artesian low-pressure osmosis membrane Filmtec TW30-1812-50. dependence productivity selectivity degree permeate rejection was determined. Was found that residual concentrations increase rejection. lowest were observed initial up 10 mg/dm3. highest phosphate above 900 At same time, constantly decreased increasing feed recovery due increased osmotic pressure membrane. mg/dm3 slightly rate 20-50% 100-900 maximum (90%), reached 97-99 % concentrations, change pH medium, hydrolysis phosphates, hydration ions, polarization. lower (95-99 %), competing influence chlorides, sulfates, bicarbonates, as well decrease solution 7.52-7.67, promotes o-phosphates.