文章基本信息
- 标题：Application of concrete surfaces as novel substrate for immobilization of TiO 2 nano powder in photocatalytic treatment of phenolic water
- 本地全文：下载
- 作者：Mohammad Delnavaz ; Bita Ayati ; Hossein Ganjidoust 等
- 期刊名称：Journal of Environmental Health Science and Engineering
- 印刷版ISSN：2052-336X
- 出版年度：2015
- 卷号：13
- 期号：1
- 页码：58
- DOI：10.1186/s40201-015-0214-y
- 语种：English
- 出版社：BioMed Central
- 摘要：
Background
In this study, concrete application as a substrate for TiO 2 nano powder immobilization in heterogeneous photocatalytic process was evaluated. TiO 2 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 TiO 2 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, TiO 2 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.
- 关键词：Concrete; Immobilization; Intermediates; Water cleaning technology
