KINETICS AND MECHANISM FOR HEXAVALENT CHROMIUM UPTAKE FROM AQUEOUS SOLUTIONS BY MAGNETITE NANOPARTICLE

摘要

The magnetite nanoparticles, prepared by the method of sonochemical synthesis, have been investigated for the removal of Cr (VI) from aqueous solutions at 25°C. Freundlich and Langmuir isotherm models were used to evaluate the data of equilibrium isotherm in the range of Cr (VI) concentrations from 50 mg L~(-1) to 1200 mg L~(-1). The Langmuir model was found to be the best to represent the equilibrium isotherm.