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United States Department of Agriculture

Agricultural Research Service

Title: Electrolyte Effects on Hydrolyzed Reactive Dye Binding to Quaternized Cellulose

Author
item LASZLO, JOSEPH

Submitted to: American Association Of Textile Chemists And Colorists Review
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: September 9, 1994
Publication Date: N/A

Interpretive Summary: The dyeing of cotton fabrics results in the generation of highly colored wastewater. The textile industry needs an effective and inexpensive method to decolorize their wastewater. We have examined the potential of using a type of cellulose, called quaternized cellulose, for the treatment of textile wastewater containing a commonly employed kind of dye, a reactive dye. It was demonstrated that quaternized cellulose effectively removed this dye under the salt and pH conditions used to apply the dye to cotton. Furthermore, the dye was easily removed from quaternized cellulose, allowing the cellulose to be used repeatedly. This indicates that quaternized cellulose provides an excellent means by which to clean water discharged from textile dyeing operations.

Technical Abstract: The presence of fiber-reactive dye hydrolysis products in dyehouse effluents poses a difficult wastewater treatment problem. Although conventional ion-exchange resins can be used to remediate reactive dye-containing effluents, regeneration of resin exchange capacity can require use of organic solvents, which substantially increases the cost of the treatment process. The present study demonstrates that quaternized cellulose can remove effluent reactive dye hydrolysis products, largely unhindered by typical dyebath concentrations of electrolytes. Furthermore, the dye adsorption capacity of the quaternized cellulose can be regenerated by base treatment (aqueous NaOH). Thus, quaternized cellulose could be economically employed for decolorization of dyehouse wastewater.

Last Modified: 9/29/2014
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