METHOD OF CLEANING WATER AND AQUEOUS SOLUTIONS TO REMOVE ANIONS AND CATIONS Russian patent published in 2003 - IPC

FIELD: water treatment. SUBSTANCE: invention relates to electrochemically removing anions and cations from aqueous media that can be applied when cleaning natural water and metallurgic, mechanical engineering, and other effluents. Electrolysis is accomplished with alternate asymmetric current involving pair of insoluble electrodes, between which liquid is passed. Required current intensity is found from formula: I = QV, where V is predetermined consumption of liquid, l/s and Q specific amount of electricity needed to convert ions into insoluble compounds, coul/l. Needed amount of electricity is found from equation: Q - where C₀ denotes initial concentration of ions, mg/l; C_f is final concentration of ions, mg/l; C_OMAX is maximal initial concentration of ions under given conditions depending on water or aqueous solution composition and determined by presence of compounds with complexing ability, mg/l; K₁ is empiric coefficient depending on composition of ions present in water or aqueous solution, coul/l; K₂ empiric coefficient depending on initial concentration of ions, coul/l; and n amount of types of ions present. EFFECT: expanded technological possibilities. 1 tbl, 2 ex