Research on deeply purifying effluent from uranium mining and metallurgy to remove uranium by ion exchange (1) developing macroporous resin

Developing macroporous resin for purifying uranium effluent from uranium mining and metallurgy is presented. Compared with 201 x 7 strong base type anion ion exchange resin, macroporous resin TS-25 and medium pore resin D263B show better adsorption property and fast adsorption rate. In acid medium, when adsorption reaches equilibrium, the total distribution coefficients of uranium on TS-25, D263, 201 x 7 and hydroxy oxime resin are 6.33, 2.78, 1.42 and 0.21 L/g respectively. TS-25 resin, D263 resin, D263B resin and 201 x 7 resin can be used in a large pH range from 1.8-10, but hydroxy oxime resin can only be used in weak alkali or alkaline solution. When ρ(U) 11.5-5.4 mg/L in effluent, the contact time is between 5-2 minutes, breakthrough point of TS-25 resin and D263B resin are 2000-2500 and 250-500 BV, and saturation BV are 4000-7600 and 1100-2700 respectively. The D264B resin shows better operation property in dilute uranium solution and the best elution property among the four kinds of resins