Journal Clean WAS (JCleanWAS)

Carmoisine dye is a synthetic dye that can have detrimental effects on the environment and also health when discarded untreated into the environment. Coconut meat waste, is an underutilized waste that is recently under investigation as an adsorbent for various harmful chemicals such as heavy metals and dyes. However, the use of coconut meat as an adsorbent for carmoisine dye has not been reported in the literature. Hence, this study uses coconut meat waste as an adsorbent to adsorb carmoisine dye from water. The preliminary findings show that the maximum removal efficiency is around 30% when the initial concentration of carmoisine in water is 50 mg/L, the lowest carmoisine initial concentration used in this study. It was also observed that the adsorption capacity increases with the increase in the carmoisine dye concentration in water, up to the maximum value of 23.25 mg/g at 200 mg/L initial carmoisine dye concentration in water. The coconut meat adsorbent exhibit Freundlich equilibrium characteristics rather than the Langmuir equilibrium. In conclusion, the data obtained in this study shows comparatively lower removal and adsorption capacity in comparison to publish works that utilizes coconut meat waste adsorbent for removal of heavy metals and other types of colour dyes.