DOI: 10.1016/j.watres.2018.11.047
Scopus记录号: 2-s2.0-85057406608
论文题名: Effect of dissolved silica on photocatalytic water purification with a TiO2 ceramic catalyst
作者: Negishi N. ; Sugasawa M. ; Miyazaki Y. ; Hirami Y. ; Koura S.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 40
结束页码: 46
语种: 英语
英文关键词: E. coli
; Formic acid
; Photocatalysis
; SiO3 2−
; TiO2 ceramic photocatalyst
Scopus关键词: Ceramic materials
; Escherichia coli
; Formic acid
; Purification
; Silica
; Titanium dioxide
; Water treatment plants
; E. coli
; Equilibrium process
; Experimental apparatus
; Photo catalytic degradation
; Photocatalytic activities
; Photocatalytic inactivations
; Total dissolved solids
; Water purification technologies
; Photocatalysis
; distilled water
; formic acid
; silicon dioxide
; titanium dioxide
; catalysis
; catalyst
; coliform bacterium
; concentration (composition)
; dissolved matter
; experimental apparatus
; experimental study
; formic acid
; photodegradation
; purification
; silica
; water technology
; adsorption
; aqueous solution
; Article
; bacterium contamination
; catalyst
; ceramics
; concentration (parameters)
; controlled study
; dissolution
; energy dispersive X ray spectroscopy
; Escherichia coli
; model
; nonhuman
; photocatalysis
; photodegradation
; priority journal
; scanning electron microscopy
; surface property
; water contamination
; water treatment
; Escherichia coli
英文摘要: If photocatalytic water purification technologies will find practical applications, the impact of total dissolved solids in the source water on the activity of the photocatalyst must be evaluated. In this study, we evaluated the effects of SiO3 2− in water on a TiO2 ceramic photocatalyst; specifically, we determined the effects of SiO3 2− on the rate of photocatalytic degradation of formic acid (as a model contaminant) and on the rate of photocatalytic inactivation of Escherichia coli in an aqueous solution. Both the rate of formic acid degradation and the sterilization rate decreased with increasing SiO3 2− concentration. On the other hand, at a given SiO3 2− concentration, the activity of the photocatalyst did not decrease over the course of 120 h, and the surface structure of the photocatalyst did not change (i.e., no precipitate formed on the surface). The decreases in photocatalytic activity due to the presence of SiO3 2− could be recovered by flushing the experimental apparatus with distilled water. These results show that the reason for the lower photocatalytic activity in the presence of SiO3 2− than in its absence was due to adsorption of SiO3 2− onto the surface of the TiO2 photocatalyst and that SiO3 2− adsorption was an equilibrium process in water. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122114
Appears in Collections: 气候变化事实与影响
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作者单位: Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, 305-8569, Japan; Department of Applied Chemistry, Chiba Institute of Technology, 2-17-1 Tsudanuma, Narashino, 275-0016, Japan
Recommended Citation:
Negishi N.,Sugasawa M.,Miyazaki Y.,et al. Effect of dissolved silica on photocatalytic water purification with a TiO2 ceramic catalyst[J]. Water Research,2019-01-01