Removal of hexavalent chromium ions using micellar modified adsorbent: isothermal and kinetic investigations
Sadaf Sarfraz, Safdar Ameer, Mohsin Javed, Shahid Iqbal, Samar O. Aljazzar, Manzar Zahra, Shahid Amin, Khizar Hussain Shah, Mohammed A. S. Abourehab, Eslam B. Elkaeed, Nasser S. Awwad, Hala A. Ibrahium
Abstract
, 25-30 °C), agitation speed (150 rpm). However, both WB and CTAB-mWB derives metal ion removal at lower pH levels (2-4), whereas SDS-mWB requires a pH between 4 and 6 for maximum percentage removal of Cr(vi). The equilibrium data of WB and SDS-mWB were modeled by the Langmuir adsorption isotherm, while the data of CTAB-mWB fitted well in the Freundlich isotherm model. The kinetic analysis of WB, SDS-mWB, and CTAB-mWB revealed that the pseudo-second-order kinetic model provides a thorough explanation for each of these adsorbents. It was found that CTAB-mWB can preferably be used for the removal of chromium(vi) due to its high affinity with adsorbate molecules and adsorption capacity.