Studies of the potential of a native natural biosorbent for the elimination of an anionic textile dye Cibacron Blue in aqueous solution

Hocine Grabi,Erwann Guénin,Wahiba Lemlikchi,Fazia Derridj

doi:10.1038/s41598-021-88657-y

Abstract

This work is devoted to the adsorption of Cibacron Blue (CB) an anionic textile dye, on bean peel (BP) an agricultural waste with neither activation nor carbonization. The adsorption was realized in batch configuration at ambient temperature in acidic medium. The adsorbent was characterized by FTIR, SEM and BET analyses; the equilibrium isotherms and kinetics were also studied. It has been found that this waste could be used as a low-cost biosorbent for CB elimination under optimal working conditions. The rate of CB elimination reaches 95% on bean bark (3.6 g/L) at pH 2.2 and a reject concentration of 25 mg/L. The pseudo-second-order describes suitably the experimental data and the external diffusion is the rate-determining step. The Freundlich isotherm fits better the CB adsorption with a correlation coefficient (R2) of 0.94 and an RMSE = 1.5115. The negative enthalpy (ΔH) and free enthalpy (ΔG°) indicate a physical and spontaneous nature of the CB biosorption onto the biomaterial.

Highlights

This work is devoted to the adsorption of Cibacron Blue (CB) an anionic textile dye, on bean peel (BP) an agricultural waste with neither activation nor carbonization
The FTIR spectra show the displacement of certain functional groups and other groups that appear from the CB dye fixation on the surface of the biomaterial BP
The present work presents the elimination of Cibacron Blue, an anionic dye, using as biomaterial native bean peel derived from plant waste precursors available in Kabylia region (Algeria)

Summary

Introduction

This work is devoted to the adsorption of Cibacron Blue (CB) an anionic textile dye, on bean peel (BP) an agricultural waste with neither activation nor carbonization. The Freundlich isotherm fits better the CB adsorption with a correlation coefficient (R2) of 0.94 and an RMSE = 1.5115. Several industrial activities continue to produce various pollutants, including organic molecules, toxic metals, dyes and pesticides, which generate nuisances and represents a serious threat to for the aquatic environment, in developing countries[1]. The textile industry contains hundreds of dyes of synthetic origin and some of them are highly carcinogenic. They are difficult to biodegrade[3,4]. Treatments often become inefficient for dye elimination at low concentrations[14]

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