Optimization of Enzymatic Treatment and Reactive Dyeing of viscose fabric in One-bath Process

Abstract

Conventional pretreatment and dyeing processes of viscose fabric are mainly conducted in two baths with substantial amounts of water and auxiliaries. These processes comprise one bath of two adopted using sodium carbonate with peroxide bleaching formulations and a second bath for the dyeing process. In this study, a regular viscose woven fabric was initially pretreated with a commercial desizing enzyme and subsequently dyed different reactive dyes in the same exhaust bath process. The effect of one was investigated and optimized, employing enzyme and mono The results showed that the one-bath pretreatment and dyeing process could be performed successfully, exhibiting remarkable colour strength and excellent performance equal to that with the conventional pretreatment and dyeing method. Both the pretreated fabrics via the bio-method and the conventional one exhibited approximately equal efficiency in terms of improved dyeing and fastness properties. The bifunctional reactive dyes, RR 195 and RBl 5, exhibited higher degrees of dye exhaustion and total fixation yield than those of the monofunctional reactive dyes, RR 180 and RR 31. Although the shorter the one enzymatic pretreatment and dyeing process, all the reactive dyeings using this Bio and colour difference values ∆ ∆ ∆ ∆E to the bifunctional dyes.

Removal of Anthraquinone Dyes from Aqueous Solutions Using Activated Carbon Fiber Prepared from Polyacrylonitrile Waste

“…Moreover, they are not readily removed by typical wastewater treatment processes due to their fused aromatic structures which remain colored for long periods of time. Therefore, the process of decolorization of anthraquinone dyes has received much attention [25][26][27][28][29][30][31][32][33][34][35]. Due to its alternate supply, low cost, and superior adsorption efficiency, activated carbons are the most often used adsorbent in industrial wastewater treatment.…”