Competitive adsorption of leather dyes by using biochar prepared from MUSA acuminata: a cost-effective technique

Abstract

Biochar prepared from Musa acuminata stem by slow pyrolysis at 3500C was characterized and analyzed for the adsorption of Congo red and Brilliant blue leather dyes in a known concentration of the solution. The SEM images of the biochar before adsorption of dyes show the porous structure and the surface area of the biochar seen to BB and CR adsorbed onto the surface of BSB-350. The BSB-350 shows the highest adsorption i.e. <90% at pH 3 and the range of pH was between 3-10. Experimental conditions like sorbent dosage and, concentration were optimized and observed in this study. The experimental data follows the Langmuir, Temkin and DR isotherm model which shows the physicochemical conditions. The maximum adsorption capacity estimated for BB was 208.33 mg/g and for CR was 46.33 mg/g. The present study shows that biochar is a cost-effective and environment-friendly adsorbent that will be used for the treatment of tannery effluent.