Seawater as an alternative to dye cotton fiber with reactive dyes

Abstract

The textile industry is a sector completely dependent on water for its full functioning; on the other hand, water represents a very high cost in the production process. The textile chemical processing area is mainly responsible for the large consumption of water. On the opposite side of this high consumption there is an evident water crisis worldwide. That fact has led to many problems to textile companies, mainly for the preparation, dyeing and printing sectors. This present work focuses on an ecologically friendly alternative for cellulosic fiber dyeing processes using seawater. Dyeing cotton fabrics with reactive dye in three primary colors (blue, yellow and red) was performed, and the results compared with processes using distilled water. Samples dyed with seawater exhibit good uniformity, intense color (color strength – K/ S) and excellent washing and rubbing fastness properties compared to the conventional process. It was possible to observe also that the use of seawater did not affect the mechanical properties of the substrate. Thereby, it was verified that the use of seawater presents as a potential and important alternative to applications in the textile dyeing process.

A critical review on the sonochemical degradation of organic pollutants in urine, seawater, and mineral water

“…Since 2000 several papers have demonstrated that organochlorinated compounds, pharmaceuticals, plasticizers, industrial additives, among others, are present in seawater causing its pollution [20] , [76] , [77] , [78] . Also, we can mention that seawater has great potential as a processing medium for dyeing steps in the textile industry, resulting in seawater waste loaded with dyes [79] , [80] . Therefore, many proofs of concept about the sonochemical treatment of seawater containing organic pollutants have been published, which are shown below.…”

New Arylazo‐Based (Chromene‐Thiazole) Hybrids as Potential MRSA Inhibitors

“…They make up 70 % of all dyes and are used in industries like printing, food, pharmaceuticals, and cosmetics. [8][9][10] The conventional method for producing these compounds is through diazo-coupling, which involves combining a diazonium salt with the appropriate active methylene compound. [11] Azo-compounds have been shown to possess intriguing biological properties, including in vitro antimicrobial activity.…”

“…Azo‐compounds are brightly colored dyes, characterized by the presence of an ‐N=N‐ double bond between two aromatic or heterocyclic rings. They make up 70 % of all dyes and are used in industries like printing, food, pharmaceuticals, and cosmetics [8–10] . The conventional method for producing these compounds is through diazo‐coupling, which involves combining a diazonium salt with the appropriate active methylene compound [11] .…”

Isolation and Stabilization of Aryldiazonium Cations With Boron Clusters

“…The most common one is dyeing. When diazonium salts undergo diazo-coupling reactions, diazo compounds are produced with great coloring features [2,3], and some of the important diazo dyes are shown in Figure 1a. Other than dyeing, some of the diazo compounds have antimicrobial, anticancer, antibacterial, antioxidant, antibiotic, antifungal and anti-HIV activity (Figure 1b) [4][5][6][7].…”