期刊
DESALINATION AND WATER TREATMENT
卷 57, 期 35, 页码 16643-16652出版社
DESALINATION PUBL
DOI: 10.1080/19443994.2015.1079806
关键词
Adsorption; Anionic dye; Multi-walled carbon nanotubes; Isotherm; Kinetics; Diffusion models
资金
- Amirkabir University of Technology (AUT)
- Iran Nanotechnology Initiative Council (INIC)
- Alborz Industrial Estates
In this research, the adsorption process of Reactive Blue 19 (RB19) as an anionic dye onto functionalized multi-walled carbon nanotubes (f-MWCNTs) was studied. For this purpose, four parameters including agitation time, adsorbent dose, initial dye concentration, and pH were examined. N-2 adsorption isotherms and Fourier transform infrared spectroscopy were used to characterize f-MWCNTs. Four isotherm and four kinetic models including two diffusion models were applied to comprehensively investigate the RB19 adsorption using f-MWCNTs. It was found that the adsorption follows Langmuir and Temkin equilibrium models with a maximum adsorption capacity of 217.39 mg g(-1). The adsorption process best fitted to pseudo-second-order kinetic model and by applying diffusion models, the predominant rate-limiting step was found to be physisorption during the liquid film diffusion.
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