Simultaneous Separation and Recovery of Phosphorus from Aqueous Solution by Bipolar Membrane Electrodialysis

Recycling phosphorus from phosphorus-containing wastes and byproducts is a promising secondary resource. Steelmaking slag generated in large quantities as byproduct of the iron steelmaking industry, contains that could be possible Phosphorus can extracted into aqueous solution; however, concentration generally lower than other elements, causing problem for recovery. In this study, bipolar membrane electrodialysis was applied to separate recover solution. The reaction performance recovery were investigated. effect initial concentration, volume ratio, electric potential on process determined. Ion adsorption an anion-exchange during stages ion competition between H2PO4- OH- later are main factors affecting extraction efficiency. maximum ratio achieved 2.46, minimum treated solution 3.64 mg/L, which under Japanese effluent standard. general, has good concentrating recovering