Environmentally friendly waste for wastewater treatment

Abstract

In this paper, the adsorption properties of two wastes from the metallurgical industry were studied: waste after shot blasting of the castings and waste moulding mixture, and waste from the wood industry, i.e. oak sawdust. A solution of Cu(II) ions was used as the adsorbate. Experimental data have shown that the waste from the metallurgical industry can be used as an adsorbent for removal of Cu(II) ions from wastewater. For oak sawdust, it could not be confirmed with certainty whether it had adequate adsorption properties due to the release of substances that lead to the coloration of the adsorbates. Lagergren's and Ho's model was used to describe the adsorption kinetics of the system waste moulding mixture/Cu(II) ions and waste after shot blasting of the castings/Cu(II) ions. It was concluded that both systems are better described by Ho's model, i.e. that the adsorption kinetics in both systems take place according to pseudo-second order reactions.