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SM ISO690:2012 MATVEEVICI, Vera, DUCA, Gheorghe, GONŢA, Maria, IAMBARŢEV, Viorica, MOCANU, Larisa. Studierea procesului de diminuare a concentraţiei coloranţilor direcţi din soluţiile-model prin aplicarea metodelor fizico-chimice. In: Studia Universitatis Moldaviae (Seria Ştiinţe Reale şi ale Naturii), 2011, nr. 1(41), pp. 147-160. ISSN 1814-3237. |
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Studia Universitatis Moldaviae (Seria Ştiinţe Reale şi ale Naturii) | ||||||
Numărul 1(41) / 2011 / ISSN 1814-3237 /ISSNe 1857-498X | ||||||
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Pag. 147-160 | ||||||
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The process of removal of textile coloring agents from model solutions by means of consecutive electrochemical and
catalytic oxidative treatment in the presence of hydrogen peroxide, and its dependence of the amount of electrochemical
coagulant, initial concentration and properties of the coloring agent as well as the iron ions (II) content was discussed in
current paper.
The obtained results prove that the removal of reactive colorants through electrical generation of coagulants is more
effective and economically sound when carried out from more concentrated model solutions of textile residual waters
(the initial concentration should between 150-200 mg/l).
The application of catalytic oxidation procedure can be applied in case of removal of reactive colorants of less
concentrated solutions (the amount of colorants should not exceed 50 mg/l).
From the acquired results it was identified that combined methods of electrochemical removal and catalytic oxidation
by hydrogen peroxide of reactive colorants assure their effective removal from model solutions of residual waters containing
up to 200 mg/l of mentioned colorants. The mineralization and residues content were reduced by 97-98%, while the
consumption of coagulant was lower by a factor of 2-2.5 in comparison with conventional methods of treatment. |
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