Title of article :
Removal of ethidium bromide by carbon nanotube in aqueous solution: isotherms, equilibrium mechanism studies, and its comparison with nanoscale of zero valent iron as adsorbent
Author/Authors :
Najafi, Fahimeh Department of Chemistry - Roudehen Branch - Islamic Azad University, Roudehen , Norouzi, Mehdi Department of Virology - School of Public Health and Institute of Health Research - Tehran University of Medical Sciences, Tehran , Zare, Karim Department of Chemistry - Science and Research Branch - Islamic Azad University, Tehran , Fakhri, Ali Department of Chemistry - Shahre-Qods Branch - Islamic Azad University, Tehran
Abstract :
The adsorption of ethidium bromide (EtBr) by single-walled carbon nanotubes (SWCNTs) and nanoscale of zero
valent iron (NZVI) were investigated to assess its possible use as adsorbents. The effect of various factors, namely
initial adsorbate concentration, adsorbent dosage, and contact time, were studied to identify adsorption capacity of
SWCNTs and NZVI surfaces. The experiment demonstrated the maximum EtBr which was obtained at 5 min to
attain equilibrium for SWCNTs and NZVI surfaces. Adsorption data were modeled with the Langmuir, Freundlichand,
Temkin isotherms. Langmuir adsorption model was used for the mathematical description of the adsorption
equilibrium, and the equilibrium data fitted very well with this model for both surfaces as adsorbents. The study
showed that SWCNTs and NZVI surfaces could be used as new and efficient adsorbent materials for the removal of
EtBr from aqueous solution. Also, the result showed that the SWCNTs were more effective than NZVI in the removal
of EtBr from aqueous solution.
Keywords :
Ethidium bromide , Single-walled carbon nanotube , NZVI , Removal , Isotherms , Kinetics
Journal title :
Astroparticle Physics
