%0 Journal Article
%T Decolourization of anthraquinone reactive dye by electrochemical reduction on reticulated glassy carbon electrode
%A Carneiro
%A Patricia A.
%A Boralle
%A Nivaldo
%A Stradiotto
%A Nelson R.
%A Furlan
%A Maysa
%A Zanoni
%A Maria Valnice B.
%J Journal of the Brazilian Chemical Society
%D 2004
%I Sociedade Brasileira de Qu¨Şmica, SBQ
%R 10.1590/S0103-50532004000400023
%X the electrochemistry reduction for the removal of reactive blue 4 (rb4) dye from aqueous solution using reticulated glassy carbon electrode is investigated. at ph < 8.0 the anthraquinone group of the rb4 dye are reduced in one cathodic step to hidroquinone after a reversible two-electron process involving a precedent two protons reaction. a stable semiquinone is detected by spectrophotometric technique. at ph > 8.0 the reduction process involves two reversible 2-electron steps, whose species are generated by a protonation equilibrium of anthraquinone group. the results shows that 60% of color removal was obtained after 3 hours of rb4 dye electrolysis at acidic and neutral conditions and only 37% at alkaline conditions. simultaneously 64% of total organic carbon was removed after electrolysis at ph 2.0.
%K reactive dyes
%K electrochemical reduction
%K dye treatment
%K reactive blue 4.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0103-50532004000400023&lng=en&nrm=iso&tlng=en