Washing-off of Unfixed Reactive Dyes on Cotton Fabrics Using Fe-TAML/H2O2 Catalyzed Oxidation System

Unfixed reactive dyes stained on cotton fabric could be removed using Fe-tetra-amido macro-cyclic ligands（ TAML） / H2O2 catalyzed oxidation system（ COS）. The colored washing-off wastewater also could be decolorized simultaneously in the same system. The decolourization kinetics showed that the decol...

Full description

Saved in:
Bibliographic Details
Published in东华大学学报（英文版） Vol. 32; no. 5; pp. 859 - 863
Main Author 尹冲 张琳萍 钟毅 毛志平
Format Journal Article
LanguageEnglish
Published Key Laboratory of Science & Technology of Eco-Textile, Ministry of Education, Donghua University, Shanghai 201620, China 31.10.2015
Subjects
chemical oxygen demand (COD)
decolourization
catalyzed oxidation system (COS)
washing-off
Online AccessGet full text

Cover

More Information
Summary:Unfixed reactive dyes stained on cotton fabric could be removed using Fe-tetra-amido macro-cyclic ligands（ TAML） / H2O2 catalyzed oxidation system（ COS）. The colored washing-off wastewater also could be decolorized simultaneously in the same system. The decolourization kinetics showed that the decolourization ratio of reactive dyes in water could reach at least 80% at room temperature in 10 min,which followed the law of pseudo-first order reaction kinetics. The effects of the COS washing-off process parameters on the decolourization ratio,chemical oxygen demand（ COD） of wastewater,K/S value,color fastness,color difference,and bursting strength were investigated in detail. The results showed that color fastness properties and final shade of fabric treated by COS were very similar to conventional soaping. The reactive dye molecules in wash-off bath were destroyed using the COS,potentially reduced COD which generated during conventional washing-off procedure.
Bibliography:31-1920/N
decolourization;catalyzed oxidation system（COS）;washing-off;chemical oxygen demand（COD）
Unfixed reactive dyes stained on cotton fabric could be removed using Fe-tetra-amido macro-cyclic ligands（ TAML） / H2O2 catalyzed oxidation system（ COS）. The colored washing-off wastewater also could be decolorized simultaneously in the same system. The decolourization kinetics showed that the decolourization ratio of reactive dyes in water could reach at least 80% at room temperature in 10 min,which followed the law of pseudo-first order reaction kinetics. The effects of the COS washing-off process parameters on the decolourization ratio,chemical oxygen demand（ COD） of wastewater,K/S value,color fastness,color difference,and bursting strength were investigated in detail. The results showed that color fastness properties and final shade of fabric treated by COS were very similar to conventional soaping. The reactive dye molecules in wash-off bath were destroyed using the COS,potentially reduced COD which generated during conventional washing-off procedure.
YIN Chong, ZHANG Lin-ping, ZHONG Yi, MAO Zhi-ping
ISSN:1672-5220