Photochemical Treatment of Industrial Textile Effluent Containing Reactive Dyes

Textile effluents are a result of the use of reactive dyes which present a strong environmental impact. These are substances of concern when conventional treatment processes are to be considered. This work refers to the study of post-treatment (purification) of the textile effluent originating from...

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Bibliographic Details
Published in:Environmental technology 2007-03, Vol.28 (3), p.321-328
Main Authors: de Brito-Pelegrini, N. N., de Tarso Ferreira Sales, P., Pelegrini, R. T.
Format: Article
Language:English
Subjects:
Applied sciences
Carbon - analysis
Catalysis
Catalytic reactions
Chemical engineering
Chemistry
Coloring Agents - analysis
Coloring Agents - chemistry
Colour
DEGRADATION
DYE TEXTILE
Dyes
Effluents
Exact sciences and technology
General and physical chemistry
General purification processes
General treatment and storage processes
Oxygen - analysis
Photocatalysis
PHOTOCATALYTIC PROCESS
Photochemical
Photochemistry - methods
Pollution
REACTIVE DYES
Reactors
Semiconductors
Temperature
TEXTILE EFFLUENT
Textiles
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Time Factors
TIO2
Titanium
Titanium dioxide
Waste Disposal, Fluid - methods
Wastes
Wastewaters
Water Pollutants, Chemical - analysis
Water Purification - methods
Water treatment and pollution
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Summary:Textile effluents are a result of the use of reactive dyes which present a strong environmental impact. These are substances of concern when conventional treatment processes are to be considered. This work refers to the study of post-treatment (purification) of the textile effluent originating from the use of reactive dyes (after biological treatment for activated sludge) through photocatalysis using TiO 2 as semiconductor. The photocatalytic process was optimised according to the mass of the semiconductor (1.4 g l −1 ), flow of air (150 ml s −1 ), temperature (55°C) and time of treatment (240 min). In the optimised conditions it was possible to verify high efficiency in the colour reduction (92%), COD (65%), BOD (40%) and TOC (29.3%). The study reached the conclusion that the photocatalytic process presents great potential as a method of post-treatment of effluents derived from the textile industry.
ISSN:0959-3330
1479-487X
DOI:10.1080/09593332808618794