Volume 11, Issue 2 (2011)                   MCEJ 2011, 11(2): 0-0 | Back to browse issues page

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Delnavaz M, Ayati B, Ganjidoust H, Sanjabi S. Comparison between Epoxy and Waterproof Sealers in TiO2 Immobilization on Concrete Surface for Treating Phenolic Wastewater by Photocatalytic Process. MCEJ 2011; 11 (2)
URL: http://mcej.modares.ac.ir/article-16-566-en.html
Abstract:   (4623 Views)
Abstract: Two kinds of concrete sealers including epoxy and waterproof were used to immobilize TiO2 nano-particles on concrete surfaces for treating 25-500 mg/L synthetic phenolic wastewater using photocatalytic process. The reactor consisted of contaminated tank, photocatalytic and aeration zones. Irradiation of TiO2 was performed by UV-A lamps at different intensity (4.42- 8.9 mW.cm-2) placed 10 cm above the concrete surfaces. SEM and EDX analys is showed a uniform appearance of TiO2 catalyst on the concrete. In influent phenol concentration (100 mg/L), pH=7 and retention time (4 hr), the removal efficiency by epoxy sealer was more than 20% compared to the waterproof sealer because of hydrophobic effects. Reduction of removal efficiency was less than 2% for the epoxy sealer after several iterations of the process. Finally, the effects of intensity and wavelength of UV lamp and system pH in removal efficiency were evaluated.
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Received: 2011/01/17 | Accepted: 2011/06/15 | Published: 2011/09/6

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