Study on Continuous Separation of High Concentration Cr (III) and Cr (VI) from Strong Acidic Aqueous Solution Using Strong Alkaline Anion Exchange Fiber Column

The continuous separation of high concentration Cr (III) and Cr (VI) from strong acidic aqueous solution was achieved in column packed with strong alkaline anion exchange fiber (SAAEF). The optimal operation conditions are as follows: flow rate 5.0 BV· h-1 and room temperature. The absorbed Cr (VI) on column could be recycled as Na2Cr2O7 or K2Cr2O7 solution after separation from Cr (III), using saturated NaCl+2.0% NaOH or saturated KCl+2.0% KOH.