Removal of Nitrophenol from Water by Dodecyl Sulfate Modified Layered Double Hydroxides

Abstract

Removal of nitrophenols from aqueous solutions through the adsorption process by using dodecyl sulfate modified layered double hydroxides was investigated. It was found that dodecyl sulfate modified layered double hydroxides had a high adsorption capacity for removing nitrophenols, while adsorption reached equilibrium within 1 h. To ascertain the mechanisms of sorption, the experimental data were modeled by using the pseudo-first and pseudo-second order kinetic equations and the results indicated that the adsorption kinetics of nitrophenols on dodecyl sulfate modified layered double hydroxides well-matched with the pseudo-second order rate expression.