We prepared 1000ppm stock solution of Malachite Green in distilled water. 25ml of the stock solution, which had been concentrated to 25ppm, was taken, and 0.01g of produced biochar was added. After stirring the mixture for 1 hour, the solution was filtered. 𝜆𝑚𝑎𝑥 was measured using a UV-Vis Spectrophotometer, and %age removal was calculated. bond stretching is accountable for the absorption band at 3481 to 3512 cm -1 , whereas C-H bond stretching is liable for the absorption bands at 2786 cm -1 for surface functionalized biochar and 1518 cm -1 to 1331 cm -1 for the stretching C-O bond. From the comparison of FTIR spectra of raw biochar with surface functionalized biochar, we come to know that there is increase in wavenumber shift in surface functionalized biochar due to its surface modification with nitric acid. So, we can say that there in bathochromic shift due to the presence of the auxochrome NH2.