ADSORPTION OF CD II AND CR VI IONS ON UNRIPE BANANA (musa sapientum) PEEL BIOMASS, A SUSTAINABLE ENVIRONMENTALLY BENIGN MATERIAL

Abstract

Under batch equilibrium approach, the removal of cadmium and chromium from aqueous solution with a sustainable eco-friendly material, unripe banana (musa sapientum) peel biomass was investigated. Cd (II) and Cr (VI) ions were discovered to be removed from aqueous solutions by unripe banana peel. From pH > 6, the removal rate of Cd (II) increases, whereas the removal rate of Cr (VI) declines. The best fit between the Langmuir and Freundlich models was found using adsorption equilibrium data. The best fit for Cr (VI) adsorption data was the Langmuir model type 1I, with R2 = 0.988. The optimum pH for cadmium and chromium was 4.00 and 10.00, respectively, with qm of 1.38 mg/g and 48.47 mg/g and percentage removal of 96.6 and 46.6 for cadmium and chromium respectively. The Langmuir adsorption isotherm correlated well with adsorption for cadmium and chromium, indicating that chemisorption is the dominant mechanism in the sorption process. As a result of the findings, it was discovered that unripe banana peel biomass may be used to effectively and efficiently remove Cd (II) and Cr (VI) ions or other pollutants from wastewater and the environment.

Keywords

• musa sapientum
• biomass
• adsorption isotherms
• chemisorption pseudo-second order