A Study on the Effects of Pre-treatment in Dyeing Properties of Cotton Fabric and Impact on the Environment

Abstract

Pre-treatment of cotton fabric prior to dyeing mainly involves a combined process consisting of scouring and peroxide bleaching. In this study main focus on to find out the major problem facing during dyeing of cotton fabrics. Pretreatment process has a greater impact on whiteness and dyeing properties of fabrics and also on environment. There are two process of pretreatment which is alkaline scouring and bleaching process and another is enzymatic scouring and bleaching process, between this two processes comparison and also observation its effects on whiteness of fabric, dyeing also impact on environment. It is also observe that the 3 gL -1 hydrogen peroxide and 2 gL -1 sodium hydroxide give the good result on fabric whiteness with low environmental impact. Different pre-treated sample of cotton fabric dyed with reactive dye. The result obtain from dyed samples the combine pre-treatment by enzymatic scouring and bleaching gives good alternative of alkaline scouring bleaching process. Since it produce low BOD, COD and TOC impact on ecological factor. Furthermore it is also added advantages that it produces same whiteness and lower hydrolysation of dyestuff and good exhaustion.

Effects of a Multi Scouring Agent on the Pretreatment and Dyeing of different Cellulosic Knitted Fabrics

“…For example, sulfur content is eliminated when applied to viscose pretreatment. Thus, this could be the reason for the better whiteness index of the multiscouring agent treated fabric [1]. Also, it can be seen in Figure 1, that the whiteness index value slightly increased for linen with multiscouring treatment, which could be attributed to the fact that it eliminates a wide range of impurities, as compared to soda ash [4].…”

“…The presence of non-cellulosic compounds such as proteins, pectins, oils, waxes, inorganic materials in the cuticle and primary cell wall of cellulosic fiber make the fiber hydrophobic and non-waterabsorbent during subsequent processes [1,2]. For that, combined scouring and bleaching is done at present, where scouring is done for removing hydrophobic substances and bleaching to eliminate yellowish natural coloring matter from cellulosic fibers with hot aqueous solution of NaOH and hydrogen peroxide at high temperature (95-100ºC) and high pH [3][4][5].…”

“…Recently, environment-friendly alternatives are being introduced in different textile treatment to ensure that there are energy savings, less water usage, less chemical usage and overall finding of eco-friendly solutions [14][15][16].To support that, multi scouring agents are being studied by researchers [17][18][19].…”

A review on nanobioremediation approaches for restoration of contaminated soil

“…Dyes have been widely recognized as an essential component in a multitude of sectors, including cosmetics and textiles. Nevertheless, it is disposed-off mainly as liquid waste matter into the surroundings, which is poisonous to living beings (Asaduzzaman et al, 2016). A study ascertained the coalesce effect of biofunctionalized Ag NPs by Chromobacterium violaceum as a biosorption strategy to remediate washing water employed to process cotton fabrics (Durán et al, 2010;Duran et al, 2017).…”

Comparison of the Effects of the Cationization of Raw, Bio- and Alkali-Scoured Cotton Knitted Fabric with Different Surface Charge Density

“…One important step is scouring, in which the complete or partial non-cellulosic components found in cotton are removed alongside impurities, such as machinery and size lubricants [11]. Nowadays, in the textile industry, there are two ways of pretreating cotton, namely, the conventional pretreatment process in alkaline conditions using sodium hydroxide or the implementation of a new, effective alternative to chemical scouring, using enzyme combinations.…”