Treatment of textile dyeing wastewater using advanced photo-oxidation processes for decolorization and COD reduction

In this study, advanced oxidation processes were applied to the treatment of a textile dyeing wastewater. The effluent presents a dark blue color, with a maximum absorbance peak at 594 nm, alkaline pH (pH = 12.4), high organic contents (COD = 1,400 mg L–1). Experiments were conducted on a lab-scale...

Full description

Saved in:
Bibliographic Details
Published in:Desalination and water treatment 2021-03, Vol.217, p.350-357
Main Authors: Khelifi, S., Choukchou-Braham, A., Sbihi, H.M., Azam, M., Al-Resayes, S.I., Ayari, F.
Format: Article
Language:English
Subjects:
COD mineralization
Decolorization
FeAl-pillared clay
Photo-Fenton
Textile dyeing wastewater
UV-light irradiation
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this study, advanced oxidation processes were applied to the treatment of a textile dyeing wastewater. The effluent presents a dark blue color, with a maximum absorbance peak at 594 nm, alkaline pH (pH = 12.4), high organic contents (COD = 1,400 mg L–1). Experiments were conducted on a lab-scale prototype using UV lamp as light source and pillared natural clay with Fe and Al as catalyst. All the processes examined lead to an effective decolorization and mineralization, but the most efficient process was the photo-Fenton, contributing to 93% decolorization and 88.8% mineralization after 3 h of reaction under UV irradiation. Characteristics of wastewater after treatment were COD below 250 mg L–1, pH 8.5 and uncolored. Thus the resultant water has conditions that are suitable for releasing in public sewage systems.
ISSN:1944-3986
1944-3986
DOI:10.5004/dwt.2021.26895