Removal of Cibacet Blue (CB) by Adsorption onto an Algerian Red Slag

Abstract

This study is based on the implementation of a composite material with absorbent properties for the elimination of organic pollutants.In our case we used the slag (red slag)from the region of Bechar, (South-East of Algeria). Characterization using DRX and Fourier transforms infrared spectrometer(FT-IR), shows that, we were able to prepare adsorbents with very interesting structural and mechanical properties. The effectiveness of obtained adsorbents was evaluated in the removal of Cibacet Blue (CB) dye using the adsorption process. Kinetic resultswith an elimination rate of 83 % show that, the time to equilibrium is influenced by experimental conditions such us, contact time, pH, initial concentration, temperature and adsorbent mass. Pseudo-first order model represent very well our experimental results with adjustment coefficients (R2) close to 1. Modeling of adsorption isotherms of the CB dye on the red slagshows that both models of Langmuir and Freundlich can present our results with acceptable adjustment coefficients (R2> 0.995).