Hierarchical porous structured zeolite composite for removal of ionic contaminants from waste streams

Zeolite A was synthesised and supported over carbon-based materials to produce a hierarchical structured composite. The method is based on the surface chemistry modification of supports. Carbonaceous supports have been prepared using residues such as cherry stones and hazelnut shells by thermal treatment. Carbons were conditioned using cationic surfactant to promote the zeolites´ attachment. Supports were covered with a zeolites layer and results showed that surface modification had a positive effect on the zeolites deposition. Copper adsorption experiments showed that the distribution of zeolite on the supports improved their uptake efficiency from 33.53 mg g-1 to 69.30 mg g-1. Kinetic results showed that materials follow the pseudo-second order equation. Composites have been prepared to allow encapsulation metals by vitrification reducing the volume of final disposal