Use of wollastonite for the treatment of Cu(II) rich effluents

Abstract

The adsorption technique using wollastonite has been applied for the removal of Cu(II) from aqueous solutions. The low concentration, high temperature and alkaline pH favor the removal of Cu(II). The Langmuir isotherm was used to represent the equilibrium data at different temperatures. The apparent heat of adsorption has been found to be 5.926 Cal mol−1. The uptake of Cu(II) is diffusion controlled and the mass transfer coefficient is 3.6 × 10−5 cm s−1. The maximum removal of Cu(II) in alkaline medium has been explained on the basis of the uptake of hydrolyzed adsorbate species by the active surface sites of adsorbent.