Removal of brilliant green dye from aqueous solution by using banana leave as adsorbent: article

Brilliant green (BG) dye is cationic dyes that are soluble in the water and commonly used for paper printing, veterinary medicine, textiles, cosmetic and food coloring. It is toxicity which affect to human health like irritation that causing vomiting, nausea and diarrhea. It also causes water pollution that directly affect the aquatic life by prevent light penetrating into the water. This study is focus to enhance the efficiency of removal brilliant green dye by using banana leaves as adsorbent and to determine the variables that affect the adsorption capacity. The banana leaves have been dried and grinded until become a powder. The parameters of the experiment are effect on the pH, effect of the initial dye concentration, effect of the contact time and effect of adsorbent dosage. The sample mixture of BG and banana leave were collected and analyzed by using UV-Vis spectrophotometer and FTIR instrument. The obtained data were analyzed to determine the percentage removal, adsorption capacity and adsorption isotherm. As a result, banana leave powder was hydroxyl group which functional group of alcohol. The optimum pH of solution was at pH 7 with the percentage removal of 98.98%. The solution reached equilibrium state in 120 minutes with adsorption capacity range of 9.86 mg/g to 49.37 mg/g. The optimum concentration of the percentage removal is at 97.33% to 98.73% at initial concentration of 50 to 250 mg/L. The percentage removal of the solution with different adsorbent dosage in the range of 0.5 to 2.5 g is 96.97% to 98.60%. Freundlich isotherm fitted the equilibrium data with correlation coefficient 0.995 which indicate multilayer adsorption. Therefore, banana leave has a potential to act as adsorbent in dye removal process and can be considered as low cost adsorbent material including banana leave waste.