Journal of Radiation Research and Radiation Proces ›› 2017, Vol. 35 ›› Issue (5): 50302-050302.doi: 10.11889/j.1000-3436.2017.rrj.35.050302

• RADIATION CHEMISTRY • Previous Articles     Next Articles

Adsorption of cesium on non-woven fabric prepared from pre-irradiation-induced graft polymerization

XU Xiao1,2, LIU Xiyan2, ZHAO Xiaoyan1, MA Hongjuan2   

  1. 1 School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China;
    2 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Jiading Campus, Shanghai 201800, China
  • Received:2017-08-28 Revised:2017-09-15 Online:2017-10-20 Published:2017-10-20
  • Supported by:

    Supported by the National Natural Science Foundation of China (11305241), Strategic Pilot and Technology Special Funds of the Chinese Academy of Science (XDA02030200), and Japanese Atomic Force Research Institute postdoctoral project

Abstract:

Sulfonic-type adsorbent was prepared from radiation-induced graft polymerization of 4-hydroxybutyl acrylate glycidylether (4HBAG) on PE/PP non-woven fabric. Sulfonation of the 4HBAG grafted PE/PP non-woven fabric was carried out in a mixed solution of Na2SO3. The process of sulfonation was investigated by the morphology and weight of the material. A sulfonic group density of 1.4 mmol/g adsorbent with a 52% molar conversion of the epoxy group was obtained. The adsorption behavior of cesium was studied with batch and column model. The sorption isotherm and sorption kinetics of cesium indicated that the adsorption process followed the Langmuir isotherm model and pseudo second-order kinetic model. The maximum adsorption capacity of cesium was evaluated as 1.35 mmol/g at a high flow rate of 1 000 SV/h. In the range of pH=4~10, the adsorption ratio remained stable at approximately 90%, and the value decreased with further increments of pH value. The effect of Na+ on the removal ratio of Cs+ was studied in its 1 mg/L and 10 mg/L solution. The removal ratio of Cs+ decreased quickly when the Na+ concentration increased from 0 to 20 mmol/L. Compared with the effects of Na+ and K+, bivalent ions such as Mg2+ and Ca2+ and the trivalent metal ion Fe3+ were found to be more impeditive to Cs+ adsorption. This sulfonic-type adsorbent exhibited the extremely rapid removal of Cs+ with a high flow rate of 1 000 SV/h.

Key words: Pre-irradiation, Graft polymerization, Sulfonic-type, Cesium, Adsorption, 4-hydroxybutyl acrylate glycidylether, PE/PP

CLC Number: 

  • TL13