Thermodynamics and kinetics of adsorption of molybdenum blue with D301 ion exchange resin  

D301树脂吸附钼蓝的热力学与动力学(英文)

作　　者：赵中伟[1,2] 许晓阳[1,2] 陈星宇[1] 霍广生[1] 陈爱良[1] 刘旭恒 徐慧[3] 

机构地区：[1]中南大学冶金科学与工程学院,长沙410083 [2]稀有金属冶金及材料制备湖南省重点实验室,长沙410083 [3]中南大学物理科学与技术学院,长沙410083

出　　处：《Transactions of Nonferrous Metals Society of China》2012年第3期686-693,共8页中国有色金属学报（英文版）

基　　金：Project(2007AA06Z129) supported by the High-tech Research and Development Program of China

摘　　要：The adsorption behavior of D301 for molybdenum blue was investigated.The thermodynamics parameters in adsorption process were calculated and the adsorption kinetics was studied.The experimental results show that the adsorption characteristic of D301 for molybdenum blue fits well with the Freundlich adsorption isotherm equation.In the adsorption process of D301 for molybdenum blue,both the enthalpy change ΔH and entropy change ΔS are positive,while the free energy change ΔG is negative when temperatures are in the range of 303-333 K.It is indicated that the adsorption is a spontaneous and endothermic process,and the elevated temperatures benefit to the adsorption.Kinetic studies show that the kinetic data are well described by double driving-force model,and the adsorption rate of molybdenum blue on D301 is controlled by the intraparticle diffusion during the adsorption process.The total kinetic equation is determined.通过静态吸附实验,研究D301树脂对钼蓝的吸附热力学和动力学。结果表明:D301对钼蓝的吸附行为符合Freundlich等温方程;在不同温度下,D301吸附钼蓝的吸附焓变ΔH和吸附熵变ΔS均为正值,而吸附自由能变ΔG为负值,表明吸附是一个自发的、吸热过程,升温有利于吸附。动力学研究表明,此吸附过程符合双驱动模型,吸附过程主要受粒内扩散步骤控制,经拟合获得动力学总方程。

关 键 词：Ni-Mo ore molybdenum blue ADSORPTION THERMODYNAMICS KINETICS 

分 类 号：O647.32[理学—物理化学]