矿物材料对Sr^(2+)、Cs^+的竞争吸附性能与表征  

Competitive Adsorption Properties and Characterization of Mineral Materials to Sr^(2+) and Cs^+

作　　者：王金明[1] 易发成[2] 

机构地区：[1]安徽理工大学化工学院,安徽淮南232001 [2]西南科技大学,四川绵阳621010

出　　处：《原子能科学技术》2012年第2期165-171,共7页Atomic Energy Science and Technology

基　　金：国家自然科学基金资助项目(10376028)

摘　　要：采用间歇法研究了相同摩尔浓度Sr2+、Cs+溶液中,矿物材料对核素Sr2+、Cs+的竞争吸附性能,用XRD对吸附Cs+、Sr2+后的矿物材料进行了表征和分析。实验表明:NF、ZF、CA对Cs+、Sr2+的平衡吸附时间分别约为7、3和14d。ZF对Cs+、Sr2+的平衡吸附量最大,其次是NF,最后是CA。NF对Cs+的吸附具有明显的选择性,CA的选择性较差,ZF最差。ZF对Sr2+的去除率基本达100%,对Cs+的去除率达72%;NF对Cs+的去除率达66%,而对Sr2+的去除率仅为15%;CA对Sr2+的去除率达29%,而对Cs+的去除率仅为16%。矿物材料吸附Sr2+、Cs+后晶胞体积均变小,晶胞参数c亦变小,其它晶胞参数a、b、β变化不规则。The competitive adsorption properties of mineral materials were studied by employing the discontinuous process in the same molar concentration Sr^2＋ and Cs^＋ solu- tions, and then mineral materials adsorbing Sr^2＋ and Cs^＋ were characterized and ana- lyzed by using XRD. The experiment results demonstrate that the equilibrium adsorption time of NF, ZF and CA to Sr^2＋ and Cs^＋ is about 7 d, 3 d and 14 d, respectively. The adsorptive quantity of ZF to Sr^2＋ and Cs^＋ is the greatest, that of NF the second, and that of CA the third. The adsorption of NF to Cs^＋ is the most obviously selective, the selectiveness of CA is comparatively worse, and that of ZF is the worst. The removal efficiency of Sr^2＋ by ZF is about 100%, the removal efficiency of Cs^＋ by ZF reaches 72%; the removal efficiency of Cs^＋ by NF is 66%, but that of Sr^2＋ by NF is only 15% ; the removal efficiency of CA to Sr^2＋ comes to 29%, while that of Cs^＋ is only 16%. The crystal unit cell volumes of the mineral materials as well as their crystal unitcell parameters c become smaller after adsorbing Sr^2＋ and Cs^＋ , but other crystal unit cell parameters a, b, and fl change irregularly.

关 键 词：矿物材料 锶 铯 竞争吸附性能 表征 

分 类 号：TQ424.1[化学工程]