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Acta Phys. -Chim. Sin.  2010, Vol. 26 Issue (11): 2890-2898    DOI: 10.3866/PKU.WHXB20101130
Thermodynamics and Kinetics of Adsorption of Diclofenac on Magnetic Multiwalled Carbon Nanotubes in an Aqueous Solution
XIONG Zhen-Hu1,2, WANG Lu1,2, ZHOU Jian-Guo3, LIU Jian-Ming1,2
1. Tianjin Key Laboratory of Water Quality Science and Technology, Tianjin 300384, P. R. China;
2. Department of Environmental and Municipal Engineering, Tianjin Institute of Urban Construction, Tianjin 300384, P. R. China;
3. Department of Material Science and Engineering; Tianjin Institute of Urban Construction, Tianjin 300384, P. R. China
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We investigated the adsorption of diclofenac (an anti-inflammatory drug) in aqueous solutions by magnetic multiwalled carbon nanotubes (MWCNTs). The results showed that the amount of adsorbed diclofenac initially increased with magnetic MWCNT dosage and stabilized at a magnetic MWCNT dosage of 0.7 g·L-1. The amount of diclofenac adsorbed by the magnetic MWCNTs was 33.37 mg·g-1 and the removal rate of diclofenac was 98.1%. The removal rate for the diclofenac increased and then decreased with the pH value of solution, but it decreased with the temperature of solution. Kinetic analysis was conducted using pseudo first and second order models. Regression results showed that the adsorption kinetics was more accurately represented by a pseudo second order model. The linear correlation coefficients and standard deviations of the Langmuir and Freundlich isotherms were determined and the results revealed that the Langmuir isothermfit the experimental results well. The calculated thermodynamic parameters were: ΔG0<0 indicating that the adsorption of diclofenac on magnetic MWCNTs was spontaneous, ΔH0<0 indicating that the absorption reaction was exothermic and that low temperatures are favorable for adsorption, and ΔS0>0 indicating that the adsorption process was a entropy enhancing process.


Key wordsAdsorption      Diclofenac      Magnetic multiwalled carbon nanotubes      Kinetics      Thermodynamics     
Received: 26 May 2010      Published: 13 October 2010
MSC2000:  O642  

The project was supported by the National Natural Science Foundation of China (50878138) and Major Project of Natural Science Foundation of Tianjin, China (07JCZDJC01700).

Corresponding Authors: XIONG Zhen-Hu     E-mail:
Cite this article:

XIONG Zhen-Hu, WANG Lu, ZHOU Jian-Guo, LIU Jian-Ming. Thermodynamics and Kinetics of Adsorption of Diclofenac on Magnetic Multiwalled Carbon Nanotubes in an Aqueous Solution. Acta Phys. -Chim. Sin., 2010, 26(11): 2890-2898.

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1. Zhang, Y. J.; Sven, U. G.; Carmen, G. Chemosphere, 2008, 73: 1151
2. Sun, Z.; Schüssler, W.; Seng, M.; Niessner, R.; Knopp, D. Analytica Chimica Acta, 2008, 620: 73
3. Alessandra, D. C.; Carmen, S.; Ana, A.; Maria, J. G.; Santiago, E.; Márcia, D. Science of the Total Environment, 2009, 407: 3572
4. Yu,W. L.; Xiong, Z. H.; Ma, H. J. Acta Scientiae Circumstantiate, 2009, 29: 2070 [于万禄,熊振湖,马华继. 环境科学学报, 2009, 29: 2070]
5. Alfred, R.; Shane, A. S.; Detlef, R. U. K. Water Research, 2009, 43: 3787
6. Patrick, O.; Bo, P.; Xing, B. S. Environmental Science & Technology, 2009, 43: 9167
7. Lu, Y. M.; Gong, Q. M.; Liang, J. Acta Physico-Chimica Sinica, 2009, 25: 1697 [卢月美,巩前明,梁吉. 物理化学学报, 2009, 25:1697]
8. Pan, B.; Xing, B. S. Environmental Science&Technology, 2008, 42: 9005
9. Sheng, G. D.; Li, J. X.; Shao, D. D.; Hu, J.; Chen, C. G.; Chen, Y. X.; Wang, X. G. Journal of Hazardous Materials, 2010, 178: 333
10. Chen, J.; Duan, C. F.; Guan, Y. F. Journal of Chromatography B, 2010, 878: 1216
11. Noushin, R.; Reza, A.; Nasrin, S.; Abbas, S.; Masud, Y. Analytica Chimica Acta, 2010, 662: 90
12. Zhang, Q.; Zhu, M.; Zhang, Q. H.; Li, Y. G.; Wang, H. G. Composites Science and Technology, 2009, 69: 633
13. Wang, B.; Gong, J. L.; Yang, C. P.; Zeng, G. M.; Zhou,W. Q. China Environmental Science, 2008, 28: 1009 [王彬,龚继来, 杨春平,曾光明, 周雯婧.中国环境科学, 2008, 28: 1009]
14. Ye, C.; Gong, Q. M.; Lu, F. P.; Liang, J. Separation and Purification Technology, 2007, 58: 2
15. Liu, C. Research of diclofenac sodiumsilk fibroin-chitosan sustained-release microsphere [D]. Suzhou: Suzhou University, 2009 [刘纯. 双氯芬酸钠丝素蛋白-壳聚糖缓释微球的研究 [D].苏州: 苏州大学, 2009]
16. Chen, M. L.; Zhang, F. J.; Oh, W. C. New Carbon Materials, 2009, 24: 159 [陈明亮,张峰君,吴沅春. 新型炭材料, 2009, 24: 159]
17. Kuo, C. Y.; Wu, C. H.; Wu, J. Y. Journal of Colloid and Interface Science, 2008, 327: 308
18. Chen, G. C.; Shan, X. Q.; Zhou, Y. Q.; Shen, X.; Huang, H. L.; Khan, S. U. Journal of Hazardous Materials, 2009, 169: 912
19. Hideyuki, K.; Tomohiro, M.; Satoshi, K.; Tohru, S.; Kiyohisa, O. Microchemical Journal, 2008, 88: 82
20. Zhang, J. B.; Zhou, Q. F.; Liu, W.; Jiang, G. B. Acta Scientiae Circumstantiae, 2009, 29: 1056 [张建斌, 周群芳,刘伟,江桂斌.环境科学学报, 2009, 29: 1056]
21. Shahnaz, Q.; Ashley, G.; Yousef, H. Journal of Hazardous Materials, 2009, 169: 318
22. Wojciech, P.; Wladyslaw, R.; Anita, P. Advances in Colloid and Interface Science, 2009, 152: 2
23. Salama, M. A.; Burk, R. C. Applied Surface Science, 2008, 255: 1975
24. Kuo, C. Y.; Wu, C. H.;Wu, J. Y. Journal of Colloid and Interface Science, 2008, 327: 308
25. Gong, J. L.; Wang, B.; Zeng, G. M.; Yang, C. P.; Niu, C. C.; Niu, Q. Y.; Zhou, W. J.; Liang, Y. Journal of Hazardous Materials, 2009, 164: 1517

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