摘要
采用一种简单有效的方法合成了2-巯基苯并噻唑(MBT)键合硅胶。将键合硅胶用于水中Co(Ⅱ)的吸附,考察了初始浓度、温度以及吸附时间等因素的影响。通过分批实验,研究了278,308,323 K3个温度条件下的吸附平衡。应用Langmuir和Freundlich 2种等温式拟合吸附热力学的实验结果表明,以Langmuir模型的拟合效果更好。计算得到吸附过程的热力学参数ΔG取ⅵ群挺鹊闹捣直鹞?22.96 kJ/mol(278 K)、-3.73 kJ/mol和69.19 J/(mol.K)。吸附动力学结果符合准二级动力学模型,其相关系数达到0.997 1。
A simple and efficient method was described for the synthesis of bonded 2-mercaptobenzothiazole-silica gel.Removal of Co（Ⅱ） from aqueous solutions through adsorption on bonded silica gel was carried out by considering the effect of various parameters,such as initial concentration, temperature and contact time.Sorption equilibrium in a batch system at 278,308 and 323 K was studied.The test results of sorption thermodynamics by Langmuir and Freundlich isotherms for fittingness show that Langmuir model fitting effect is better.Thermodynamic parameters,such as ΔG^θ 、ΔH^θ and ΔS^θ were found as-22.96 kJ/mol（278 K）,-3.73 kJ/mol and 69.19 J/（mol·K） respectively.The test results of sorption kinetics are conformed to the pseudo-second order kinetic model with a related coefficient of 0.997 1.
出处
《化学工程》
CAS
CSCD
北大核心
2008年第3期9-12,共4页
Chemical Engineering(China)
基金
淮海工学院自然科学基金资助项目(Z2006010)
