DEPOLUTION OF INDUSTERIAL WASTE WATER BY OXIDATION IN AQUEOUS SOLUTION USING SUPPORTED METAL COMPLEXES

Abstract

In the present study, new composites based on local rice straw ash (RSA) were synthesized. The RSA was supplied by controlled burning of rice straw at 600o C for 4 h. The synthesized composites, by incorporatingtitania (TiO2, 10 – 50 wt %), copper phthalocyanine complex (CuPc, 1.0 wt %) or TiO2 – CuPc combination, beside the pristine RSA, were pressed at (2000 psi)into disc-shaped forms.In this process, recycled polymer foam (Ps F-2000/ chloroform) was used as binder. For comparative purposes, composites of RSA-TiO2 were also studied in powder form. Physicochemical characterization of various composites was performed adopting the XRD, N2-physisorption, FTIR, EDX, TEM, and SEM techniques. The as-synthesized composites were successfully applied for removal of hazardous textile dyes (represented in this study by methylene blue, MB) as well as some heavy metal ions (represented by Cd, Pb and Cu), causing environmental pollution and toxic problems in industrial waste water. Different kinetic variables of the dye or the heavy metal ions removal in aqueous solutions were investigated, e.g., order, model and mechanism of reaction, effect of initial concentrations, pH, temperature, stability and reusability of the used composite.