D314树脂吸附钼离子的热力学和动力学  

D314 resin adsorption thermodynamics and kinetics of molybdenum ions

作　　者：宁阳坤 李涛[1] 杨涛[1] 刘红召[2,3] 赵恒勤 任保增[1] 

机构地区：[1]郑州大学化工与能源学院,河南郑州450001 [2]中国地质科学院郑州矿产综合利用研究所,河南郑州450006 [3]河南省黄金资源综合利用重点实验室,河南郑州450006

出　　处：《应用化工》2017年第11期2134-2137,共4页Applied Chemical Industry

基　　金：国家自然科学基金项目(21506197;21646011);国土资源部公益性行业专项(201311024-2)

摘　　要：采用静态实验法研究D314树脂吸附钼离子的机理,在实验条件下分别用弗伦德利希(Freundlich)和朗格缪尔(Langmuir)等温吸附模型分析了D314树脂对钼离子的吸附热力学过程。结果表明,Langmuir方程相关性较高,可拟合钼离子的吸附过程。ΔH>0表明离子交换过程为吸热过程,热力学函数ΔG<0表明D314树脂吸附钼离子过程能够自发进行,ΔS>0表明钼离子吸附是熵增过程。准二级动力学模型其相关系数R^2在0.99以上能够很好拟合D314树脂吸附钼离子的过程,颗粒扩散为钼离子吸附过程的主要控速步骤。The mechanism of adsorption of molybdenum ions by D314 resin was studied by static experiment. The adsorption thermodynamics of D314 resin on molybdenum ion was analyzed by Freundlich and Langmuir isothermal adsorption model respectively under experimental conditions. The results show that the Langmuir equation has a high correlation and can fit the adsorption process of molybdenum ions.ΔH > 0 indicates that the ion exchange process is the endothermic process,and the thermodynamic function ΔG < 0 indicates that the process of adsorption of molybdenum ions in D314 resin can be spontaneously carried out. ΔS > 0 indicates that molybdenum ion adsorption is entropy increasing process. Quasisecond-order kinetic model with a correlation coefficient of R^2 above 0. 99 can be well fitted in the process of adsorption of molybdenum ions by D314 resin. Particle diffusion is the main step in the process of molybdenum ion adsorption.

关 键 词：钼 吸附 热力学 动力学 

分 类 号：TQ013.1[化学工程] TQ013.2