Characterization of refractory matters in dyeing wastewater during a full-scale Fenton process following pure-oxygen activated sludge treatment
Bae W1; Won H2; Hwang B1; de Toledo RA3; Chung J4; Kwon K1; Shim H3
2015-04-28
Source PublicationJournal of Hazardous Materials
ISSN0304-3894
Volume287Pages:421-428
Abstract

Refractory pollutants in raw and treated dyeing wastewaters were characterized using fractional molecular weight cut-off, Ultraviolet-vis spectrophotometry, and high-performance liquid chromatography-electrospray ionization-mass spectrometry (HPLC-ESI/MS). Significant organics and color compounds remained after biological (pure-oxygen activated sludge) and chemical (Fenton) treatments at a dyeing wastewater treatment plant (flow rate ~100,000m/d). HPLC-ESI/MS analysis revealed that some organic compounds disappeared after the biological treatment but reappeared after the chemical oxidation process, and some of that were originally absent in the raw dyeing wastewater was formed after the biological or chemical treatment. It appeared that the Fenton process merely impaired the color-imparting bonds in the dye materials instead of completely degrading them. Nevertheless, this process did significantly reduce the soluble chemical oxygen demand (SCOD, 66%) and color (73%) remaining after initial biological treatment which reduced SCOD by 53% and color by 13% in raw wastewater. Biological treatment decreased the degradable compounds substantially, in such a way that the following Fenton process could effectively remove recalcitrant compounds, making the overall hybrid system more economical. In addition, ferric ion inherent to the Fenton reaction effectively coagulated particulate matters not removed via biological and chemical oxidation.

KeywordColor Removal Dyeing Wastewater Electrospray Ionization-mass Spectrometry Fenton Process Molecular Weight Cut-off (Mwco)
DOI10.1016/j.jhazmat.2015.01.052
URLView the original
Indexed BySCI
WOS Research AreaEngineering ; Environmental Sciences & Ecology
WOS SubjectEngineering, Environmental ; Environmental Sciences
WOS IDWOS:000353089700049
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Cited Times [WOS]:30   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING
Corresponding AuthorShim H
Affiliation1.Hanyang Univ, Dept Civil & Environm Engn, Ansan 425791, Gyeonggi Do, South Korea
2.Hanyang Univ, Dept Chem, Ansan 425791, Gyeonggi Do, South Korea
3.Univ Macau, Dept Civil & Environm Engn, Taipa, Macau, Peoples R China
4.Samsung Engn Co Ltd, R&D Ctr, Gyeonggi Do 443153, South Korea
Corresponding Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Bae W,Won H,Hwang B,et al. Characterization of refractory matters in dyeing wastewater during a full-scale Fenton process following pure-oxygen activated sludge treatment[J]. Journal of Hazardous Materials,2015,287:421-428.
APA Bae W.,Won H.,Hwang B.,de Toledo RA.,Chung J.,...&Shim H.(2015).Characterization of refractory matters in dyeing wastewater during a full-scale Fenton process following pure-oxygen activated sludge treatment.Journal of Hazardous Materials,287,421-428.
MLA Bae W,et al."Characterization of refractory matters in dyeing wastewater during a full-scale Fenton process following pure-oxygen activated sludge treatment".Journal of Hazardous Materials 287(2015):421-428.
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