Removal of metanil yellow dye from aqueous solution using cassava peel

Unused materials from agricultural are known as agricultural waste. This cheap and renewable agricultural waste has the ability to remove heavy metals and dyes from wastewater. Nowadays, agricultural wastes are mostly used in adsorption process to treat the polluted water from various industries like textile, tannery, candle, pharmaceutical, etc. Adsorption is known as the effective method to remove heavy metals, contaminants and dyes from the effluent. Cassava peel as a low-cost adsorbent has the ability to remove dye from aqueous solution. The main aim of this study is to investigate the potential and adsorption capacity of raw cassava peel as adsorbent for removal of Metanil Yellow dye. The characteristic of cassava peel was studied using FT-IR and SEM analysis. Adsorbent size, contact time, dosage of adsorbent, initial dye concentration and pH are the main factors that affecting adsorption. In this study, these parameters were investigated to determine the optimum parameters and adsorption isotherms for removal of Metanil Yellow dye using cassava peel. 3 g of small size adsorbent (< 0.125 mm) in 150 mg/L of initial dye concentration for 8 hours at pH 8 was showed the highest percentage of dye removal. The equilibrium data was best-fitted to Langmuir isotherm with the maximum adsorption capacity was 3.618 mg/L.