Logo-ajehe
Submitted: 17 Apr 2017
Accepted: 22 May 2017
ePublished: 30 Jun 2017
EndNote EndNote

(Enw Format - Win & Mac)

BibTeX BibTeX

(Bib Format - Win & Mac)

Bookends Bookends

(Ris Format - Mac only)

EasyBib EasyBib

(Ris Format - Win & Mac)

Medlars Medlars

(Txt Format - Win & Mac)

Mendeley Web Mendeley Web
Mendeley Mendeley

(Ris Format - Win & Mac)

Papers Papers

(Ris Format - Win & Mac)

ProCite ProCite

(Ris Format - Win & Mac)

Reference Manager Reference Manager

(Ris Format - Win only)

Refworks Refworks

(Refworks Format - Win & Mac)

Zotero Zotero

(Ris Format - Firefox Plugin)

Avicenna J Environ Health Eng. 2017;4(1): 61902.
doi: 10.5812/ajehe.61902
  Abstract View: 2580
  PDF Download: 1896

Research Article

Preparation of Magnetic Multi-Walled Carbon Nanotubes to Adsorb Sodium Dodecyl Sulfate (SDS)

Zahra Rahmani 1, Mohammad Taghi Samadi 1*

1 Department of Environmental Health Engineering, Faculty of Health, Hamedan university of Medical Sciences, Hamedan, IR Iran
*Corresponding Author: *Corresponding author: Mohammad Taghi Samadi, Department of Environmental Health Engineering, Faculty of Health, Hamedan University of Medical Sciences, Hamedan, IR Iran. Tel: +98-9188129968, Fax: +98-08138380025,, Email: samadi@umsha.ac.ir

Abstract

Surfactants are one of the main groups of pollutants released into aqueous solutions due to human activities and their harmful effects have been proven on human. In this study, first, magnetic multi-walled carbon nanotubes (MMWCNTs) were synthesized and then, the effects of operating parameters such as surfactant concentration, adsorbent dosage, and pH values were analyzed on the adsorption process. MMWCNTs were characterized by means of X-ray diffraction (XRD) analysis and fourier transform infrared spectroscopy (FTIR). The optimal adsorption conditions were achieved at initial pH = 4.6, adsorbent concentration = 0.5 g/L, and initial SDS concentration = 15 mg/L. In addition, the equilibrium of sorption reached after 120 min and the maximum capacity of SDS for monolayer coverage was found to be 61 mg/g at 25°C. Kinetic studies were performed under optimal conditions and the sorption kinetics was described using the pseudo-second-order kinetic model. The experimental data were studied using Freundlich, Langmuir, and Sips models. Finally, the experimental data were fitted reasonably by Langmuir isotherm. The results demonstrated that MMWCNTs with respect to their high adsorption capacity, relatively low equilibrium time, and capability to be separated from aqueous solutions (after adsorption) could be applied to wastewater treatment.

 
First Name
 
Last Name
 
Email Address
 
Comments
 
Security code


Abstract View: 2581

Your browser does not support the canvas element.


PDF Download: 1896

Your browser does not support the canvas element.