Publication detail

WATER MATRIX LIMITATIONS FOR REMOVAL OF REACTIVE AZO DYE FROM DYEING WASTEWATERS USING THE PHOTOCATALYTIC PROCESS

Authors: Palarčík Jiří | Smolný Marek | Cakl Jiří

Year: 2021

Type of publication: ostatní - článek ve sborníku

Name of source: ChemZi

Publisher name: Slovenská chemická spoločnosť pri SAV

Place: Bratislava

Page from-to: 252-252

Titles:

Language	Name	Abstract	Keywords
eng	WATER MATRIX LIMITATIONS FOR REMOVAL OF REACTIVE AZO DYE FROM DYEING WASTEWATERS USING THE PHOTOCATALYTIC PROCESS	Considering the great variety of fibers, dyes, process aids, and finishing products, the textile wet-processing industry generates wastewaters of great chemical complexity and diversity which are not adequately treated in conventional wastewater treatment plants. The objective of this study was to demonstrate the advantages/disadvantages of photocatalytic degradation of reactive azo dye Reactive Orange 12 in several complex matrices of simulated wastewater. A suspension photoreactor was equipped with TiO2 catalyst and irradiated using a low energy UV-A LED source. The inorganic ions present in the treated systems affected dye adsorption, caused colloidal instability and acted as a hydroxyl radical scavenger. The wastewater decolorization was a significantly faster process in comparison with the decrease in total organic carbon content in the reaction mixture. This indicates that total mineralization is a gradual, longer-term process and that the original dye is degraded through several degradation byproducts. The mineralization time was further significantly prolonged in the presence of organic nitrogen substances.

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