NDLI: Recycling wool-dyeing effluents after renovation through photocatalysis with Cu-Fe bimetallic-grafted polytetrafluoroethylene fiber complex and H$_{2}$O$

Content Provider	Springer Nature Link
Author	Li, Bing Dong, Yongchun Ding, Zhizhong
Copyright Year	2015
Abstract	A Cu-Fe bimetallic-poly acrylic acid-grafted polytetrafluoroethylene (PTFE) fiber complex (Cu-Fe-PAA-g-PTFE) was prepared as an effective heterogeneous photo-Fenton catalyst for oxidative treatment and recycling of acid dye effluents from dyeing of wool fabric. Important factors affecting acid dye degradation, namely catalyst loading, H$_{2}$O$_{2}$ concentration, solution pH, and dye concentration, were examined to optimize the photo-Fenton process conditions for the treatment of acidic dyeing effluents. Three acid dyes were used for the coloration of wool fabrics by a regular exhaustion process. The resulting wool-dyeing effluents were then treated using the optimized photo-Fenton process. The impact of recycling on the quality of the dyed wool fabric was also investigated. A photo-Fenton reaction system consisting of Cu-Fe-PAA-g-PTFE and H$_{2}$O$_{2}$ successfully degraded the acid dyes in water. Complete decoloration and a relatively high TOC (total organic carbon) removal percentage were achieved in 4.0 h under ultraviolet radiation for real wool-dyeing effluents when 7.0 g/l Cu-Fe-PAA-g-PTFE and 7.0 mmol/l H$_{2}$O$_{2}$ were used. The number of recycled effluents was found to be highly determined by their quality and dyeing properties of the acid dyes used. The dyeing quality was not affected for three successive cycles. However, lighter shades, significant color differences, and deteriorated fastness were observed for dyed wool fabrics in the fourth dyeing cycle, possibly because of an increase in the residual TOC value of the renovated effluents. Further TOC reduction of the treated effluents is therefore needed for their repeated reuse in more than three dyeing cycles.
Starting Page	794
Ending Page	801
Page Count	8
File Format	PDF
ISSN	12299197
Journal	Fibers and Polymers
Volume Number	16
Issue Number	4
e-ISSN	18750052
Language	English
Publisher	The Korean Fiber Society
Publisher Date	2015-06-11
Publisher Place	Seoul
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Dyeing effluent Renovation Fenton reaction Recycling Acid dyes Polymer Sciences
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering Polymers and Plastics

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