摘要
采用孔内结晶法合成了磷钼酸铵二氧化硅吸附剂(AMP/SiO2),通过XRD、BET、EPMA等手段对其进行了表征。研究了接触时间、钠钾钙镁四种共存离子对AMP/SiO2吸附Cs的影响。结果表明,AMP/SiO2对Cs的吸附在10min即可达平衡,且受钾离子的影响较大而受其他三种共存离子的影响较小,吸附过程符合Langmuir吸附模型和假二级动力学方程,在0.6mol/L的钠溶液中对Cs的静态及动态交换容量分别可达0.390mmol/g和0.323mmol/g。
A ammonium molyhdopho-sphate （AMP） loaded silica adsorbents （AMP-silica） was synthesized by crystallization method, and its characterization were investigated by XRD, BET and EPMA methods. Effects of contacting time and co-existing cations, such as Na＋ , K＋ , Ca2＋ and Mg2＋ , were investigated bY batch experiments, and column operations were also carried out. The AMP-silica has a very fast adsorption kinetics; it takes just 10 min to reach equilibrium. The distribution coefficient （Ka） of Cs＋ is slightly decreased with increasing concentrations of co-existence cations. The adsorption follows a typical Langmuir model and the pseudo-second-order reaches as high as 0. 390 mmol/g and 0. 323 0.6 mol/L Na, respectively. kinetic model. The adsorption capacity of Cs mmol/g in batch and column experiments in
出处
《核化学与放射化学》
CAS
CSCD
北大核心
2014年第4期210-215,共6页
Journal of Nuclear and Radiochemistry
基金
国家自然科学基金资助项目(No.21261140335)
上海交通大学新进青年教师启动计划资助项目(No.2202011001)
关键词
CS
吸附
磷钼酸铵
二氧化硅
Cs
adsorption
ammonium molybdopho-sphate（AMP）
SiO2
