几种矿物材料对Cs^+吸附性能的研究

Study on Adsorptive Capacity of Cs^+ in Several Mineral Materials

通过几种矿物材料对Cs+吸附性能的研究,采用间歇法对优选出的合成沸石(ZF)研究其在不同环境条件下(浓度、温度、pH、模拟地下水)对Cs+的吸附性能,为评价中低放核废物处置效果提供一些参考数据。结果表明,ZF对Cs+的平衡吸附容量随Cs+溶液浓度的升高而增大,平衡吸附比随Cs+溶液浓度的升高而降低;平衡吸附容量、平衡吸附比随水相温度的升高而降低;在pH=5~9范围内,pH值对其吸附性能影响不大,但当pH=11时,ZF的吸附性能发生了明显的下降;在不同模拟地下水中,ZF的吸附性能随模拟地下水中化学组成不同而不同;其吸附平衡时间大约在10~15 d。

According to adsorptive capacity of few materials on Cs^＋ , the synthetic zeolite（ZF） was selected to study adsorptive capacity for Cs^＋ in a few conditions including temperature, pH value, concentration and simulated groundwater with the intermittent method and offered some references for valued mid-lower radiowaste disposition. Experiment results show that adsorptive quantity of Cs^＋ on ZF increases and adsorptive ratio decreases with the increasing of Cs^＋ concentration in solution; and pH ranged from 5-9, its adsorptive capacity varies a little and when pH = 11 its adsorptive capacity fall down clearly; and in different simulated groundwater, its adsorptive capacity varies with chemical components of simulated groundwater. Moreover, adsorptive equilibrium time of ZF is about 10-15 d.