FTIR spectroscopy was used to probe the functional groups on the surface of the cassava peel (both pristine and loaded cassava peel). The spectra were collected with a FTS-3500 GX (Bio-Rad) spectrometer within the range 400–4000cm−1 using a KBr window. Pure KBr background was automatically subtracted from the sample spectra. Spectra were plotted using the same scale on the absorbance axis.