Figure to Figure show the changes in the dye solutions and adsorbent before and after the adsorption process. Differences in SC before and after the adsorption process could not be identified by FTIR (Figure ) however, DRS proved to be a more useful technique (Figure ). With DRS, we were able to detect changes in the optical properties of SC before and after the adsorption process. As shown in the DRS spectra, there was an emergence of a peak around 670 nm for SC samples containing adsorbed MB and a peak around 520 nm for SC containing SO dye. These peaks increased in intensity as the concentration of dye exposure increased, hence could be used to compare the relative amounts of dye uptake. The wavelengths of these peaks in DRS are identical to the peaks identified in UV/Vis solution analysis (666.07 nm and 522.02 nm for MB and SO respectively).