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      Separation of Acid and Arsenic from Waste Liquid after Selenium Extraction from Ni-Mo Ore Smelting Dust with Ion Exchange Membrane

      ZHUO Xiao-jun;HOU Xiao-chuan;YANG Run-de;LI He;Changsha Research Institute of Mining and Metallurgy Co Ltd;  
      The mechanism of separating acid and arsenic from waste liquor after selenium extraction by using anion exchange membrane was discussed. The average diffusion velocity of H~+ and Na~+ using the selected 1~# and 3~# anion exchange membrane was investigated by diffusion dialysis static test. The variation of H~+ concentration in the diffusion chamber and dialysis room with time during the diffusion dialysis process was studied,and the separation coefficients of acid and salt by 1~# and 3~# anion exchange membrane were calculated to be 5. 87 and 10. 98,respectively. It is concluded that acid and salt separation effect by 1~# anion exchange membrane is better than that by 3~# anion exchange membrane.
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