Banana peel as bioremediation agent in textile dyes decolorization for wastewater management

Abstract

The aim of this study is to investigate the possibility of utilizing enzymatic and adsorbent banana peel extract as a bioremediation agent by evaluating its adsorption capacity on selected reactive dyes commonly used in the textile industry. The effects of polyphenol oxidase and peroxidase enzyme, pH, temperature, dye concentration on adsorption capacity were examined. The polyphenol oxidase enzyme isolated from banana peel extracted with buffer pH 6.5 showed highest decolorization of Methylene blue and Basic fuchsin while the polyphenol oxidase enzyme isolated from banana peel extracted with buffer pH 7.5 had the greatest decolorization. Complete adsorption was observed after 24 h of incubation for all banana peel extract concentrations. At pH 6–11, the adsorption capacity of banana peel was 60%, 70%, and 85%, respectively, and peaked after 24 h (96%). When the temperature was greater than 50 °C, the adsorption capacity increased overtime and reached 98% after 24 h. It can be concluded that banana peel can be utilized as an effective bioremediation agent due to its high adsorption capacity on selected textile dyes.