کلیدواژهها
عنوان مقاله English
نویسندگان English
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.
کلیدواژهها English
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