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[1]金 虹,余训民*,关洪亮.SI-2树脂对镍离子的静态吸附动力学[J].武汉工程大学学报,2015,37(05):41-45.[doi:10. 3969/j. issn. 1674-2869. 2015. 05. 008]
 ,Static adsorption kinetics of nickel ions on SI-2 resin[J].Journal of Wuhan Institute of Technology,2015,37(05):41-45.[doi:10. 3969/j. issn. 1674-2869. 2015. 05. 008]
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SI-2树脂对镍离子的静态吸附动力学(/HTML)
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
37
期数:
2015年05期
页码:
41-45
栏目:
化学与化学工程
出版日期:
2015-05-31

文章信息/Info

Title:
Static adsorption kinetics of nickel ions on SI-2 resin
文章编号:
1674-2869(2015)05-0041-05
作者:
金 虹余训民*关洪亮
武汉工程大学化学与环境工程学院,湖北 武汉430074
Author(s):
JIN HongYU Xun-minGUAN Hong-liang
School of Chemical and Environmental Engineering,Wuhan Institute of Technology,Wuhan 430074, China
关键词:
离子交换等温吸附吸附速率常数吸附活化能
Keywords:
ion exchange isothermal adsorption adsorption rate constant adsorption activation energy
分类号:
TQ028.3
DOI:
10. 3969/j. issn. 1674-2869. 2015. 05. 008
文献标志码:
A
摘要:
为了研究电镀废水中镍的去除方法,采用离子交换树脂法吸附镍离子. 首先对SI-2树脂的结构进行能谱分析和红外表征,然后探讨pH、初始浓度、温度和时间对镍离子吸附量的影响,在此基础上研究SI-2树脂对镍离子的等温吸附动力学特性. 结果表明,SI-2树脂是无机硅胶型树脂,交联反应发生在树脂中的羟基上;pH=5时吸附最佳,树脂的最大吸附容量为3 000 mg/g;吸附过程中吉布斯自由能为-24.21 kJ/mol,说明吸附过程是自发进行的;SI-2树脂对镍离子的吸附符合Langmuir和Freundlich模型;吸附过程符合拟二级动力学方程,吸附活化能为1.532 kJ/mol. 液膜扩散和颗粒内扩散是整个吸附过程的主要速率控制步骤.
Abstract:
To remove nickel from the electroplating waste water, the adsorption of nickel ions with ion exchange resin was investigated. First, the structure of SI-2 resin was characterized by energy disperse spectroscopy and infrared spectroscopy. Then the effects of pH, initial concentration, temperature and time on the adsorption of nickel ions were discussed and the isothermal adsorption and adsorption kinetics were studied. The results show that SI-2 resin is inorganic silicon and the reaction of crosslinking is on the hydroxyl of the resin;the maximum adsorption capacity of SI-2 resin is 3 000 mg/g when pH is 5; the gibbs free energy in the course of adsorption is -24.21 kJ/mol, which demonstrates that the adsorption of nickel ions is a spontaneous adsorption process; the adsorption isotherm of nickel ions on the resin fits the model of Langmuir and Freundlich; the adsorption kinetics fits the pseudo-second-order equation well, and the activation energy is 1.532 kJ/mol. The adsorption process is controlled by film diffusion and intra particle diffusion.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2015-03-25基金项目:武汉工程大学研究生教育创新基金(CX2013108).作者简介:金虹(1988-),女,湖北襄阳人,硕士研究生.研究方向:废物资源化利用. * 通信联系人
更新日期/Last Update: 2015-07-01