Competitive Biosorption of Acid Dyes from Binary Solutions onto Enteromorpha prolifera: Application of the First Order Derivative Spectrophotometric Analysis Method

Abstract

The biosorption of Acid Red 274 and Acid Red 337 dyes from single and binary solutions on Enteromorpha prolifera was investigated in a single stage batch system. The first order derivative spectrophotometry was tested in order to analyse the studied binary solutions of the selected dyes. The single- and multi-component Langmuir and Freundlich isotherm models were applied to the experimental equilibrium data and the isotherm parameters were estimated. It was observed that the uptake amounts of the first component decreased with increasing concentration of the second component from binary solution. As a result, the binary biosorption of AR274 and AR337 dyes on E.prolifera have an antagonistic effect. The binary biosorption of AR274 and AR337 dyes in a single stage batch system was modelled and the equilibrium concentrations of the exit stream were found by using the experimental equilibrium curves and operating lines for the biosorption of single and binary dye solutions.