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Heavy Metal Removal from Water by Adsorption Using Pillared Montmorillonite

Abstract  Removal of Cu2+, Cr3+ and Cd2+ from aqueous solutions by adsorption on montmorillonite modified by sodium dodecylsulfate (SDS) and hydroxy‐alumino‐silicate (HAS) was investigated. Experiments were carried out as a function of solution pH, solute concentration, and time. The Langmuir model was adopted to describe the single‐solute adsorption isotherm, in which the Langmuir parameters were directly taken from those obtained in single‐solute systems. The kinetics of metal ions adsorption was examined and the pseudo‐first‐order rate constant was finally evaluated.