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Biogenic sulfide for azo dye decolorization from textile dyeing wastewater
Zeng, Qian1; Wang, Yu2; Zan, Feixiang1; Khanal, Samir Kumar3; Hao, Tianwei4
2021-06-10
Source PublicationChemosphere
ISSN0045-6535
Volume283Pages:131158
Abstract

Azo dye is the most versatile class of dyes used in the textile industry. Although the sulfidogenic process shows superiority in the removal of azo dye, the role of biogenic sulfide produced by sulfate-reducing bacteria (SRB) in the decolorization of azo dye is unclear. This study explored the mechanism of biogenic sulfide for removal of a model azo dye (Direct Red 81 (DR 81)) through biotic and abiotic batch tests with analysis of intermediates of the azo dye degradation. The results showed that biogenic sulfide produced from sulfate reduction directly cleaved two groups of azo bond (-N[dbnd]N-), thereby achieving decolorization. Moreover, the decolorization rate was enhanced by nearly 3-fold (up to 42 ± 1 mg/L-hr; removal efficiency > 99%) by adding an external carbon source or elevating the initial azo dye concentration. This study showed that biogenic sulfide plays an essential role in azo dye decolorization and provides a new avenue for the potential application of biogenic sulfide from the sulfidogenic system for the treatment of azo dye-laden wastewater.

KeywordAzo Dye Biogenic Sulfide Decolorization Sulfate-reducing Bacteria Textile Wastewater
DOI10.1016/j.chemosphere.2021.131158
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000692108200006
PublisherPERGAMON-ELSEVIER SCIENCE LTDTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Scopus ID2-s2.0-85107803426
Fulltext Access
FWCI1.5679865
Citation statistics
Document TypeJournal article
CollectionDEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING
Faculty of Science and Technology
Corresponding AuthorHao, Tianwei
Affiliation1.Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong
2.Shenzhen Water (Group) Co., Ltd, Shenzhen, China
3.Department of Molecular Biosciences and Bioengineering, University of Hawai'i at Mānoa, Honolulu, United States
4.Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Macau, China
Corresponding Author AffilicationFaculty of Science and Technology
Recommended Citation
GB/T 7714
Zeng, Qian,Wang, Yu,Zan, Feixiang,et al. Biogenic sulfide for azo dye decolorization from textile dyeing wastewater[J]. Chemosphere,2021,283:131158.
APA Zeng, Qian,Wang, Yu,Zan, Feixiang,Khanal, Samir Kumar,&Hao, Tianwei.(2021).Biogenic sulfide for azo dye decolorization from textile dyeing wastewater.Chemosphere,283,131158.
MLA Zeng, Qian,et al."Biogenic sulfide for azo dye decolorization from textile dyeing wastewater".Chemosphere 283(2021):131158.
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