Studies on the removal of some toxic metal ions from aqueous solutions and industrial waste. Part I (Removal of lead and cadmium by hydrous iron and aluminium oxide)

Abstract

The adsorption of two metal ions Pb²⁺ and Cd²⁺ has been observed on hydrous aluminium and iron oxide which are prepared and characterized by well known methods. Hydrous ferric oxide exhibits bettwr sorption capacity for the metal ions. The uptake of lead is much higher than cadmiua and follows Langmuir model. Thermodynamic parameters of the process have been estimated by kinetic measurements which also provide mechanistic information.