Study on the decolorizing of Rhodamine B by the liquid discharge on Ti anode

The effect on the decolorizing of simulated wastewater by plasma catalysis on anodic Ti needles in liquid was studied. The decolorizing rate of Rhodamine B was measured, which was related with the peak value, pulse frequency, distance of electrodes, depth of the needles under the water, Na₂SO₄ concentration, pH. The reaction rate constant was about 0.0298 min^-1 under 500 V, conforming to the first order reaction kinetic model The results showed that TiO₂ formed on Ti anode enhanced the discharge under low voltage of 500 V, and liquid plasma TiO₂ on the electrode catalytic system naturally integrated during the discharge which can enhance the effectiveness of discharge.