fulltext.study @t Gmail

Degradation of 1,4-dioxane from industrial wastewater by solar photocatalysis using immobilized NF-TiO2 composite with monodisperse TiO2 nanoparticles

Paper ID Volume ID Publish Year Pages File Format Full-Text
45219 46407 2016 9 PDF Available
Title
Degradation of 1,4-dioxane from industrial wastewater by solar photocatalysis using immobilized NF-TiO2 composite with monodisperse TiO2 nanoparticles
Abstract

•Solar photocatalysis of 1,4-dioxane using NF-TiO2-monodisp.TiO2 films was studied.•Kinetics of 1,4-dioxane degradation in various water matrices were investigated.•1,4-Dioxane was successfully removed from real wastewaters from chemical industry.•Degradation pathways of 1,4-dioxane by immobilized photocatalysis were proposed.

The degradation of 1,4-dioxane was accomplished by solar photocatalysis using an immobilized nitrogen and fluorine co-doped titanium dioxide (NF-TiO2) composite with monodisperse TiO2 nanoparticles. The effect of different wastewater matrices was studied, and the treatment of an industrial effluent contaminated with 1,4-dioxane was carried out. Compared to the degradation rate in a synthetic solution (kdioxane = 0.34 ± 0.02 h−1), 1,4-dioxane removal decreased in the industrial wastewater (kdioxane = 0.27 ± 0.01 h−1) due to the presence of inorganic constituents, whereas, the increase of the effluent pH to 6.9 produced only a slight decrease of the photocatalytic efficiency (kdioxane = 0.31 ± 0.01 h−1). In the photocatalytic treatment of the industrial effluent, almost complete degradation of 1,4-dioxane (≤100%) was achieved along with 65% and 50% removal of COD and TOC, respectively. Moreover, remarkably similar results (about 50% of COD removal in 6 h) were achieved using both the immobilized lab-made catalyst and the commercial P25-TiO2. In the chromatographic study of metabolites, ethylene glycol diformate, ethylene glycol monoformate, and formic acid were identified as major reaction intermediates, and thereby, the main reaction pathways have been proposed. The progressive decrease of the partial oxidation efficiency down to about 0.2 and the moderate increase of the mean oxidation state of carbon in the solution (up to +0.5) indicate that a complete mineralization of the contamination from the current industrial effluent could be feasible using this supported catalyst.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
NF-TiO2; Monodisperse titania; Immobilized catalyst; Photocatalysis; 1,4-Dioxane
First Page Preview
Degradation of 1,4-dioxane from industrial wastewater by solar photocatalysis using immobilized NF-TiO2 composite with monodisperse TiO2 nanoparticles
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 180, January 2016, Pages 44–52
Authors
, , , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us