Eriochrme black-T removal from aqueous environment by surfactant modified clay: equilibrium, kinetic, isotherm, and thermodynamic studies

Abstract

In this study, the removal of Eriochrome black T (EBT) from aqueous solutions was evaluated by cationic surfactant of hexadecyl trimethyl ammonium bromide (HDTMA)-modified montmorillonite clay (MC). The effects of contact time, pH, adsorbent dosage, EBT concentration, solution ion strength, and temperature were investigated on the EBT removal. HDTMA-MC was also examined by Fourier transformed infrared (FTIR) spectroscopy and X-ray diffractometer (XRD). The results illustrated that the experimental data were well followed by the pseudo-second-order kinetic and Freundlich isotherm models. The results also showed HDTMA-MC can be used as an effective adsorbent for the removal of EBT from aqueous solution.

Keywords:

• Adsorption
• cationic surfactant
• montmorillonite
• eriochrome black T

Disclosure statement

All authors declare that there is no conflict of interest in this study.

Additional information

Funding

The authors would like to thank the Vice Chancellery for Research of Lorestan University of Medical Sciences for financial supporting of this study [Grant no. LUMS-1615].