Decolorization of azodyes using the atmospheric pressure plasma jet

POSTER

Abstract

Atmospheric pressure plasma jet operated in air/argon mixture is tested for decolorization of Bezactiv Orange V-3R dye used in the textile industry. The decolorization efficiency is determined by spectrophotometric measurements at 493.7 nm which corresponds to the breaking of dye N$=$N bond. The initial concentration of 50~mg/L of dye is reduced 50 times after 120 minutes of treatment by plasma. The results are compared to the efficiency of the suspended TiO$_{2}$ powder and activated by an UV lamp (300~W). The radicals responsible for removal of the dye are OH and super-anion radical. It is found that efficiency of the plasma and TiO$_{2}+$ UV is quite similar for the treatment times up to 60 min. After that, TiO$_{2}$ shows higher decolorization rates (100 times reduction after 90 min). However, when plasma and TiO$_{2}$ (but without the UV lamp) are applied together, it is found that there are synergetic effects and that the efficiency is increased. Plasma (less than 2 W) is not expected to produce high amounts of UV light in the atmospheric pressure.

Authors

  • Sasa Lazovic

    Institute of Physics, University of Belgrade, Serbia

  • Dejan Maletic

    Institute of Physics, University of Belgrade, Serbia

  • Natasa Tomic

    Institute of Physics, University of Belgrade, Serbia

  • Gordana Malovic

    Institute of Physics, University of Belgrade, Serbia

  • Uros Cvelbar

    Jozef Stefan Institute, Ljubljana, Slovenia

  • Zorana Dohcevic-Mitrovic

    Institute of Physics, University of Belgrade, Serbia

  • Zoran Petrovic

    Institute of Physics University of Belgrade, Institute of Physics, Pregrevica 118, 11080 Belgrade, Serbia, Institute of Physics University of Belgrade Serbia, Institute of Physics, University of Belgrade, Serbia, Institute of Physics, University of Belgrade, Pregrevica 118, 11080 Belgarde Serbia, Institute of Physics, University of Belgrade, Belgrade, Serbia, Institute of Physics University of Belgrade, P.O.B. 68, 11080 Belgrade, Serbia