Comparison of 4-chloro-2-nitrophenol adsorption on single-walled and multi-walled carbon nanotubes
Yazarlar (6)
Ali Mehrizad Islamic Azad University, Science And Research Branch, İran
Mehran Aghaie Islamic Azad University, North Tehran Branch, İran
Parvin Gharbani Islamic Azad University, Ahar Branch, İran
Siavoush Dastmalchi Biotechnology Research Center,Tabriz, İran
Prof. Dr. Majıd MONAJJEMI Islamic Azad University, Science And Research Branch, İran
Karim Zare Islamic Azad University, Science And Research Branch, İran
| Makale Türü |
Özgün Makale
(ESCI dergilerinde yayınlanan tam makale)
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| Dergi Adı | Iranian Journal of Environmental Health Science and Engineering | ||
| Dergi ISSN | 1735-1979 | ||
| Makale Dili | İngilizce | Basım Tarihi | 09-2012 |
| Cilt / Sayı / Sayfa | 9 / 5 / – | DOI | – |
| Makale Linki | http://www.scopus.com/inward/record.url?eid=2-s2.0-84871183827&partnerID=MN8TOARS | ||
| Özet |
| The adsorption characteristics of 4-chloro-2-nitrophenol (4C2NP) onto single-walled and multi-walled carbon nanotubes (SWCNTs and MWCNTs) from aqueous solution were investigated with respect to the changes in the contact time, pH of solution, carbon nanotubes dosage and initial 4C2NP concentration. Experimental results showed that the adsorption efficiency of 4C2NP by carbon nanotubes (both of SWCNTs and MWCNTs) increased with increasing the initial 4C2NP concentration. The maximum adsorption took place in the pH range of 2-6. The linear correlation coefficients of different isotherm models were obtained. Results revealed that the Langmuir isotherm fitted the experimental data better than the others and based on the Langmuir model equation, maximum adsorption capacity of 4C2NP onto SWCNTs and MWCNTs were 1.44 and 4.42 mg/g, respectively. The observed changes in the standard Gibbs free energy, standard enthalpy and standard entropy showed that the adsorption of 4C2NP onto SWCNTs and MWCNTs is spontaneous and exothermic in the temperature range of 298-328 K. © 2012 Mehrizad et al. |
| Anahtar Kelimeler |
| 4-chloro-2-nitrophenol | Adsorption | Carbon nanotube | Isotherm model | Thermodynamic |
