Volume 8, Issue 2 (8-2015)                   ijhe 2015, 8(2): 127-140 | Back to browse issues page

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Malakootian M, Mahvi A H, Jafari Mansoorian H, Alizadeh M, Hosseini A. Study of application of alumina-coated carbon nanotube for removal of Hydroxy Benzene from aqueous solutions: Adsorption and determination of equilibrium and kinetics parameters. ijhe. 2015; 8 (2) :127-140
URL: http://ijhe.tums.ac.ir/article-1-5241-en.html
1- PhD of Environmental Health Engineering, Prof. of Environmental Health Engineering Research Center and Dep. of Environmental Health, Kerman University of Medical Sciences, Kerman, Iran.
2- PhD of Environmental Health Engineering, Assistant Prof. of Department of Environmental Health, Tehran University of Medical Sciences, Tehran, Iran
3- MSc of Environmental Health Engineering, Environmental Health Engineering Research Center, Lecturer of Department of Environmental Health, Kerman University of Medical Sciences, Kerman, Iran. , h.mansoorian@yahoo.com
4- MSc Student of Department of Environmental Health Engineering, School of Public Health, Zahedan University of Medical Sciences, Zahedan, Iran
Abstract:   (4728 Views)

Background and Objective: Phenol and phenol derivatives in industrial wastewater are among the pollutants with priorities. The high cost and low efficiency of some routine treatment processes of industrial wastewater has limited their use. One of the new methods under consideration is, nowadays, adsorption using carbon nanotubes. This study was conducted in order to evaluate the application of alumina-coated multiwall carbon nanotubes in eliminating phenol from synthetic wastewater. Materials and Methods: This study was performed in laboratory at batch scale. Multi-wall carbon nanotubes were coated with Alumina. The concentration of phenol was determined by spectrophotometer through photometry. The effect of pH changes, dosage of adsorbent, contact time, the initial concentration of phenol, temperature, and the concentrations of different salts on the efficiency of absorption was evaluated. Then, the absorption results were described using the Langmuir and Freundlich isotherms and the synthetics of absorption. Results: It was found that absorption efficiency increased significantly by decreasing the initial concentration of phenol and pH and by increasing the carbon nanotube dosage, temperature, and contact time. On the other hand, the maximum elimination of phenol from the solution (98.86%) occurred at 4 mg/l phenol concentration, under acidic conditions (pH=3), at adsorbent dosage of 0.05 g/l, at temperature of 45°C, and contact time of 10 min. Evaluation of the regressions isotherms showed that the process follows the Langmuir model and second-degree synthetic absorption. Conclusion: The high efficacy (98%) of the adsorption process in this study showed that alumina-coated multiwall carbon nanotubes have a good capability in eliminating phenol and can be used as an appropriate and new method for eliminating phenol and its derivatives from wastewater.

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Type of Study: Research | Subject: wastewater
Received: 2014/05/24 | Accepted: 2015/07/29 | Published: 2015/07/29

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