Abstract:
To study removal of synthetic embalming wastewater by photocatalytic oxidation. Modified activated carbon was used as a supporter. Titanium dioxide supported on activated carbon was chosen as a photocatalyst that prepared by hydrolysis precipitation. Photocatalytic by Titanium dioxide/UV process was evaluated for degradation of the synthetic formaldehyde solution using a lab scale-batch reactor. The effects of catalyst dosage, pH and initial concentration of formaldehyde solution were studied. From the experimental results, it was found that the highest efficiency of formaldehyde degradation was achieved when employing the dosage catalyst 1 g/l. Additional, both pH and initial concentration of formaldehyde had a significant effect on the removal. The photocatalytic degradation of formaldehyde was favored under an acidic condition. Furthermore, the experiment results showed that photocatalytic efficiency was enhanced when adding hydrogen peroxide. At hydrogen peroxide concentration was 2% by volume, formaldehyde removal complete within 40 minutes. While no adding hydrogen peroxide in system, formaldehyde was removing only 60%. However, formaldehyde removal include volatilibity of its which at 60 minutes formaldehyde can loss 14.3%.