Fig. 2. Fourier transform infrared (FTIR) spectra of the fermentation by-product (FB) (a), the coal-combustion by-products (CCBs) (b), and the 50:50 CCB–FB mixture after washing (c), in the 450 to 4000 cm-1 region, prepared as KBr pellets
Fig. 2. Fourier transform infrared (FTIR) spectra of the fermentation by-product (FB) (a), the coal-combustion by-products (CCBs) (b), and the 50:50 CCB–FB mixture after washing (c), in the 450 to 4000 cm-1 region, prepared as KBr pellets