Application of concrete surfaces as novel substrate for immobilization of TiO 2 nano powder in photocatalytic treatment of phenolic water

Journal of Environmental Health Science Engineering

Sohrab Sanjabi¹  Hossein Ganjidoust²  Bita Ayati²  Mohammad Delnavaz³ 

[1] Material Engineering Department, Nano Materials Division, Tarbiat Modares University, Tehran, Iran;Civil and Environmental Engineering Faculty, Tarbiat Modares University, Tehran, Iran;Civil Engineering Department, Faculty of Engineering, Kharazmi University, Tehran, Iran

关键词: Water cleaning technology;    Intermediates;    Immobilization;    Concrete;   

Others  :  1221922
DOI  :  10.1186/s40201-015-0214-y

 received in 2014-10-15, accepted in 2015-07-21,  发布年份 2015

【 摘 要 】

Background

In this study, concrete application as a substrate for TiO ₂nano powder immobilization in heterogeneous photocatalytic process was evaluated. TiO ₂immobilization 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 TiO ₂was 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, TiO ₂concentration, 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.

【 授权许可】

   
2015 Delnavaz et al.

【 图 表 】

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