Adsorption of Dye Eosin and Acid Yellow RR from an Aqueous Solution on Two Different Samples of Activated Carbon by Static Batch Method

The present paper deals with removal of dye Eosin and Acid Yellow RR on two different samples of
activated carbon by static batch method. Experimental data on optical density of blank solutions of
different concentrations of the two dyes ranging from 10 to 100 mg/L and optical density of solutions
after adsorption on activated carbon samples were taken and analyzed. Calibration curves were
plotted and the amount of dye adsorbed was calculated. The data was fitted to Langmuir and
Freundlich isotherms for two different carbon samples and different concentration values. Constants
were calculated from the slope and intercept values of the isotherms. Coefficient of correlation R2 and
Standard Deviation SD were also noted. The data fitted well to the isotherms. It was observed that
adsorption decreased with increase in ppm concentrations. Carbon sample C2 showed higher
potential to adsorb the dye Eosin and C1 showed higher potential to adsorb Acid Yellow RR. Further
Carbon sample C2 showed better adsorption in acidic pH as compared to in alkaline pH for both dyes.
From the analysis of the data it is shown that C2 sample has a good capacity to remove the textile dye
from the residue water although C1 was also good for Acid Yellow RR.