HU Pei-zhuo, LIU Lian, WANG Hai-jing, XIAO Zhi-wen, NAN Yu, QIAN Li-juan. Synthesis of Ammonium Phosphomolybdate/Polyacrylic Acid Composite Gel Adsorbent and Separation of Cesium[J]. Journal of Nuclear and Radiochemistry, 2019, 41(4): 361-369. DOI: 10.7538/hhx.2019.YX.2019016
    Citation: HU Pei-zhuo, LIU Lian, WANG Hai-jing, XIAO Zhi-wen, NAN Yu, QIAN Li-juan. Synthesis of Ammonium Phosphomolybdate/Polyacrylic Acid Composite Gel Adsorbent and Separation of Cesium[J]. Journal of Nuclear and Radiochemistry, 2019, 41(4): 361-369. DOI: 10.7538/hhx.2019.YX.2019016

    Synthesis of Ammonium Phosphomolybdate/Polyacrylic Acid Composite Gel Adsorbent and Separation of Cesium

    • Ammonium phosphomolybdate/polyacrylic acid composite adsorbent(AMP-PA) was synthesized. The AMP-PA was characterized by FTIR and XRD. The effect of contact time, nitrate acid concentration, Cs+ concentration and co-existing cations was studied by batch experiments. The static experiment results show that the equilibrium of cesium adsorption at AMP-PA is about 5 hours. The concentration of HNO3 has little effect on the adsorption amount of cesium in the range of 0-3.0 mol/L. The adsorption process can be described by Langmuir equation, and the calculated adsorption capacity reaches 4.7 mg/g. The desorption rate is about 70% using 3.0 mol/L NH4Cl+1.0 mol/L HNO3. Cesium ions can be selectively adsorbed in the presence of foreign cations. The column operations show that cesium adsorption capacity on AMP-PA is 4.32 mg/g, and the desorption rate is about 50.4%. Cesium can be selectively extracted in the presence of Na+, K+, Sr2+, Co2+, Fe3+, Zn2+, and Ca2+. In the leaching solution of cesium, the concentration of Co2+ is lower than detection concentration. The concentration of Fe3+ is the highest among the foreign cations, which separation factor is about 3, and is four orders of magnitude lower than the initial concentration.
    • loading

    Catalog

      Turn off MathJax
      Article Contents

      /

      DownLoad:  Full-Size Img  PowerPoint
      Return
      Return