ÎNLĂTURAREA COLORANŢILOR TEXTILI ŞI A SUBSTANŢELOR AUXILIARE PRIN ELECTROFLOTARE LA PRIMA ETAPĂ

Vera MATVEEVICI, Maria GONŢA, Larisa MOCANU, Veronica PORUBIN Universitatea de Stat din Moldova

Abstract

REMOVING TEXTILE DYES AND AUXILIARIES BY ELECTROFLOTATION IN THE FIRST STAGE 

The main purpose of the paper was to study the simulation systems which contain textile auxiliaries and dyes, which differ in their nature. 

As a result of the scientific research it was found that the removal effect of the mixture of dyes and auxiliary sub-stances depends on the dimensions and the charge of the dyestuff particles which at their disposal are dispersed and stabilized by the auxiliaries. Thus, it was established that the effect of removing the mixture which contains direct DR dye and textile auxiliaries is greater than the effect of removing the reactive mixture with RO dye in the presence of the same auxiliary substances (95,0-99,0% and 74,0 to 82,0%). Therefore, systems containing the direct dye DR and auxiliary substances can be treated by combining electroflotation and adsorption on activated carbon, and solutions containing RO dyestuff and auxiliary substances can be treated by combining electroflotation, catalytic oxidation and adsorption on activated carbon. 

Keywords: chemical oxygen demand removal, electro flotation, simulated dyeing effluent, propylene oxide, 2,2-Bis(hydroxymethyl )propionic acid, diethylene glycol.