Cassava peel as adsorbent for removal of Malachite Green Dye

The problem with the dyes industry with the health issues is becoming common phenomenon. The effectiveness of using several low cost adsorbent materials from agricultural waste for dye removal from textile effluent has made it best alternative solution compare to expensive treatment methods. The preparation of raw adsorbent from agricultural waste could boost economic return and controls the environment pollution. In this study, cassava peel has been used as raw material to adsorb the Malachite green dye. Cassava peel can be waste generated by food processing industry. The purpose of this project is to investigate the potential of cassava peel as adsorbent for the removal of Malachite green dye. Therefore, the effects of a few parameters such as adsorbent size (0.125, 0.3 and 0.710 mm), adsorbent dosage (0.1, 0.3, 0.5, 0.7, 1.0, 2.0, 3.0, 4.0 and 5.0 g ), initial dye concentration (10, 30, 50, 70, 100, 200 and 300 mg/L), contact time (4, 8, 12, 16, 20 and 24 hours) and pH (1, 2, 3, 4, 5, 6, 7, 8, 9 and 10) were studied. This study revealed that up to 99.26% of Malachite green dye removal can be achieved under an optimum condition with several parameters that have been studied (adsorbent size: 0.125 mm, adsorbent dosage: 3.0 g, initial dye concentration: 100 mg/L, contact time: 16 hours and pH: 3. Then, the data were analysed using adsorption isotherm (Langmuir and Freundlich Isotherm). The data obtained was best fitted in Langmuir isotherm model with maximum adsorption capacity of 14.085 mg/g. In a nutshell, this study indicates that cassava peel have a potentials to become low-cost adsorbent in order to remove dye in waste water treatment.