Author/Authors :
Delnavaz، Mohammad نويسنده Civil and Environmental Engineering Faculty, Tarbiat Modares University, Tehran, Iran , Civil Engineering Department, Faculty of Engineering, Kharazmi University, Tehran, Iran , , Ayati، Bita نويسنده Department of Environmental Engineering, School of Civil and Environmental Engineering, Tarbiat Modares University, Tehran, Iran , , Ganjidoust، Hossein نويسنده Civil and Environmental Engineering Faculty, Tarbiat Modares University, Tehran, Iran , , Sanjabi، Sohrab نويسنده Material Engineering Department, Nano Materials Division, Tarbiat Modares University, Tehran, Iran ,
Abstract :
Background: In this study, concrete application as a substrate for TiO2 nano powder immobilization in heterogeneous
photocatalytic process was evaluated. TiO2 immobilization on the pervious concrete surface was done by different
procedures containing slurry method (SM), cement mixed method (CMM) and different concrete sealer formulations.
Irradiation of TiO2 was prepared by UV-A and UV-C lamps. Phenolic wastewater was selected as a pollutant and
efficiency of the process was determined in various operation conditions including influent phenol concentration, pH,
TiO2 concentration, immobilization method and UV lamp intensity.
Findings: The removal efficiency of photocatalytic process in 4 h irradiation time and phenol concentration ranges of
25–500 mg/L was more than 80 %. Intermediates were identified by GC/Mass and spectrophotometric analysis.
Conclusions: According to the results, photocatalytic reactions followed the pseudo-first-order kinetics and can
effectively treate phenol under optimal conditions.
