沸石对Sr^(2+)的吸附性能研究  

Study on the Adsorption of Sr^(2+) on Zeolite

作　　者：王金明[1] 易发成[2] 

机构地区：[1]安徽理工大学 [2]西南科技大学

出　　处：《金属矿山》2009年第5期138-142,共5页Metal Mine

基　　金：国家自然科学基金项目(编号:10376028)

摘　　要：采用间歇法研究沸石在不同环境条件下(浓度、温度、pH、介质)对模拟核素Sr2+的吸附性能并对它们的吸附机理进行了探讨,为评价中低放核废物处置效果提供一些参考依据。试验表明,沸石对Sr2+的吸附平衡时间在14d左右;沸石对Sr2+的吸附性能是随着液相温度的升高而降低;沸石在介质2,3,4中对Sr2+吸附性能比在介质1中的对Sr2+吸附性能差,沸石吸附Sr2+受介质离子影响比较大;沸石对Sr2+的吸附性能是随着溶液pH值的升高而提高;沸石对Sr2+的平衡吸附量是随着溶液浓度的增大而增大,而平衡吸附率和平衡吸附比是随着随着溶液浓度的增大而降低。The paper studies the adsorption capacity of zeolite for simulated nuclide Sr^2＋ under different environment conditions （concentration, temperature, pH, media） and its adsorption mechanism, providing some references to the assessment of the disposal effect of medium and low radioactive radwastes. The experiments indicate that adsorptive equilibrium time of zeolite for Sr^2＋ is about 14 days. Its Sr^2＋ adsorption performance decreases with the rise of liquid phase temperature ; is inferior at No. 2, 3 and 4 media to that in No. 1 medium; is greatly affected by the medium irons; and increases with the rise in solution pH value. The equilibrium adsorption of zeolite for Sr^2＋ increases while the equilibrium adsorption rate and ratio decrease with the rise of solution concentration.

关 键 词：沸石 Sr2+ 吸附性能 

分 类 号：TQ424.1[化学工程] S153.61[农业科学—土壤学]