Abstract
The Diminishing of the Content of Textile Direct Dyes and Auxiliary Compounds during Their Catalytic Oxidation
Highlights
The main pollutants in waste waters generated during the technologic coloring of different types of fabrics are diverse classes of dyes as well as auxiliary compounds such as surfactants, polyalcohols, dye fixing agents and others
In a 250 mL flask a solution of brown direct dye (0.5 mg/L), anionic surfactant (20 g/L) and ethylene glycol
Each consecutive stirring was followed by sampling of 5 mL of solution, that were transferred into test tubes containing 3 mL
Summary
The main pollutants in waste waters generated during the technologic coloring of different types of fabrics are diverse classes of dyes as well as auxiliary compounds such as surfactants, polyalcohols, dye fixing agents and others. Dyes and surfactants are chemically stable compounds that hardly interact with oxidants and cannot be treated by biochemical processes. The removal of residues of dyes and surfactants as well as the compliance with sanitary norms is achieved through application of combined methods of treatment that ensure a better oxidation, retention and elimination of pollutants [1]. The methods described in literature [2] refer to adsorption of surfactants by activated charcoal or other synthetic brands of natural adsorbents. The combined processes of treatment of surfactants [1] by means of extraction through flotation and further degradation during the second phase of treatment were investigated as well
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