Electrochemical Declorization Of Anthraquinone Dye And Bromamine Acid On ACF Electrode

The textile industry is one of the biggest source of pollution and resources consumptions,along with the printing industry development,the environmental pollution which the dye creates is serious day by day.Differnt methods treating dye wastewater were carried on each kind of route of administration attempt,and the certain progress has been made. As an eco-friendly technology, in recent years, there has been increasing interest in the use of electrochemical method for the treatment of dye wastewater. This technology has many virtues such as: little or no use for additional chemicals, without secondary pollutants and expediently control, etc.Most studies for dye wastewater treatment using electrochemical method were conducted to investigate the influences of the control factors i.e. electrode materials, cell voltage, current density, electrolyte concentration, pH or mass-transport rate on the decolorization, the remove rate of organic, current efficiency and energy consumption of the wastewater treated under condition of invariable cell voltage and current. However, under potentiostatic and galvanostatic model, there are few study reported for the effects of the electrode potential and current density on the decolorization. The objective of this study is to investigate the effects of the electrode potential and current density on the decolorization of Reactive Blue 19 (an anthraquinone dye) and its intermediate, bromamine acid using potentiostatic and galvanostatic technology. The essential mechanism of decolorization was obtained through the comparison of the FT-IR spectra between Reactive Blue 19 and bromamine acid.The results obtained were shown as: (1) In the range of 0 —2.2 V and -0.5 —8 mA cm^-2 , the decolorization observed attributes to the adsorption of bomamine acid on the surface of ACF and the adsorption behavior is significantly due to polarization; (2) In the range of 0 -2.2 V and 0.25 - 12.5 mA cm^-2, the adsorption of bromamine acid on the ACF surface is inhibited with the increase of electrode potential or the current density; (3) In the range of 0.25-12.5mA·cm^-2 , the electrooxidation results in the decolorization of Reactive Blue 19 and the decoloring process follows a quasi-first order kinetics; (5) In the range of -0.5 - -8 mA cm^-2, the decolorization results from the adsorption of Reactive Blue 19 on the surface of ACF and the adsorption behavior is significantly affected by polarization.