Author/Authors :
Bazrafshan، Edris نويسنده Health Promotion Research Center, Zahedan University of Medical Sciences, Zahedan, Iran , , Kord Mostafapour، Ferdos نويسنده Health Promotion Research Center, Zahedan University of Medical Sciences, Zahedan, Iran , , Hoseini ، Seyed Ali Reza نويسنده Post graduate Specialist in Orthodontics, Member of Orthodontic Research Center, Dept. of Orthodontics, School of Dentistry, Shiraz, University of Medical Sciences, Shiraz, Iran , , Zazouli، Mohammad Ali نويسنده Department of Environmental Health Engineering, Faculty of Health and Health Sciences Research Center, Mazandaran University of Medical Sciences, Sari ,
Abstract :
variations in their compositions. Strong color is one of the main characteristics of textile effluent
and, if not eliminated, it can cause serious problems to the environment. In the present study,
multi-walled carbon nanotubes (MWCNTs) were used as an adsorbent for the removal of
Reactive Red-120 (RR-120) textile dye from aqueous solutions.
Materials and Methods: The influence of key parameters including pH (2-12), concentration of
dye
(10 to 200 mg/L), contact time (30-270 min), adsorbent dosage (0.01-0.07 g/L) have been
investigated in order to find the optimum adsorption conditions (sample size =
48).
Results: Optimum pH for removing of RR-120 dye was found to be 5 and for this condition
maximum adsorption capacity was obtained as 3453.4 mg/g. Experimental results have shown
that by increasing the adsorbent dosage, the rate of dye removal was increased, but the amount of
adsorbed dyes per mass unit of MWCNTs was declined. It was found that the data fitted to
Langmuir better than BET and Freundlich model.
Conclusion: Results suggest the potential of using the MWCNTs as an adsorbent for effective
treatment of dye-contaminated wastewaters.
