聚丙烯腈-亚铁氰化钾镍对Cs^+的动态吸附性能

Dynamic adsorption capacity of polyacrylonitrile-potassium nickel hexacyanoferrate(Ⅱ) for Cs^+

通过动态吸附实验,研究了聚丙烯腈基亚铁氰化钾镍(PAN-KNi CF)对模拟放射性废水及实际放射性废水中Cs+的吸附效果,并采用SEM、FT-IR、XRD等对吸附剂进行了表征。结果表明,PAN-KNi CF能够有效地去除水中的Cs+,当溶液中含有共存离子时,PAN-KNi CF吸附Cs+的穿透曲线都从右向左移动;减容比为2 122时,PANKNi CF对实际放射性废水中137Cs的去污因子仍高达512;被PAN-KNi CF吸附的137Cs衰变成137Bam后会从PANKNi CF上解析下来。

The adsorption effect of polyacrylonitrilie-potassium nickel hexacyanoferrate（Ⅱ）（PAN-KNi CF） on Cs＋from simulated and actual radioactive wastewater has been studied by dynamic adsorption experiments,and PAN-KNi CF characterized and analyzed by SEM,FT-IR,XRD,etc. The results show that PAN-KNi CF as an adsorbent could remove Cs＋from aqueous solution efficiently. The existence of co-existing ions contained in solution would result in the shifting of breakthrough curves of PAN-KNi CF adsorption for Cs＋from right to left. When the volume reduction ratio is 2 122,the decontamination factor of137 Cs in the actual radioactive wastewater treated by PAN-KNi CF is still as high as 512. In addition,it is found that after the137 Cs adsorbed with PAN-KNi CF has decayed and become137 Bam,it can be resolved from PAN-KNiCF.