Application of concrete surfaces as novel substrate for immobilization of TiO2 nano powder in photocatalytic treatment of phenolic water

Background: in this study, concrete application as a substrate for tio2 nano powder immobilization in heterogeneousphotocatalytic process was evaluated. tio2 immobilization on the pervious concrete surface was done by differentprocedures 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 andefficiency 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 of25–500 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 caneffectively treate phenol under optimal conditions.