Biosorption of Manganese Ions (II) by Immobilized Biomass on a Mixture of Silica Gel and Zeolite

Abstract

This study is the absorption capacity of immobilized S. cerevisiae biomass on silica gel mixture and zeolite in the manganese (II) ion in solution. with used was interaction using batch technique of immobilized biomass weight on silica gel and zeolite with solution of manganese ion (II) at concentration of manganese solution, pH and certain contact time. Manganese (II) concentrations before and after interaction were measured by a viscous spectic genome spectrometer using a formaldoxime complex at a maximum wavelength. The result showed that the weight of immobilized S. cerevisiae biomass on silica gel and zeolite influenced the absorption of Mn (II) in solution, the optimum absorption occurred on the use of 75 mg of immobilized biomass. The absorption of manganese (II) by immobilized biomass on silica gel and zeolite is not affected by contact time from the first 5 minutes to 75 minutes of contact time. The initial pH of the solution affects the absorption of manganese (II) by immobilized biomass, the higher the initial pH of the more absorbed manganese (II) solution, the Mn (II) absorption is relatively stable after pH 7. Initial concentration of manganese (II) II), optimum uptake occurs at concentrations of 50 mg / L, with a maximum absorption capacity of 10.989 mg or 2.0 x 10-4 mol of Mn (II) / g of immobilized S. cerevisiae biomass. The binding energy between S. cerevisiae biomass immobilized with manganese (II) is -30.69 kJ / mol.