Removal of Azo Dye C.I. Reactive Red 195 from Aqueous Solution by High-voltage Discharge Plasma
|Keywords||High-voltage discharge plasma Single needle - plate reactor Reactive Red 195 Advanced Oxidation|
China faces serious water shortages and water pollution dual water environment issues , which will restrict China's rapid economic development . Of dye production and consumption country , especially azo dyes , it is widely used in printing and dyeing , paper , leather , plastic production industry . The majority of azo dyes are highly structured polymers and hard to biodegradable , which will cause serious water pollution problems . Azo dyes not only cause water chroma many azo dyes are toxic and mutagenic . The dye wastewater into focus and difficulty of the industrial wastewater treatment . The high-voltage discharge plasma is a emerging oxidation technology for the treatment of organic wastewater . The high-voltage discharge plasma set of physical, chemical , photochemical , ultrasonic , electrolysis in one , while it produces hydrogen radicals , hydroxyl radical , superoxide anion radical , ozone , hydrogen peroxide , which hydroxyl radicals can oxidize organic compound , having a high oxidation resistance , and non-selective . In this paper, a high-voltage discharge plasma and needle - plate reactor , azo dyes Reactive Red 195 as a major wastewater , degradation experimental study . The effects of initial pH, initial concentration , output power , electrode spacing , air flow rate , the initial conductivity additives Red 195 degradation of water activity . With the increase in the initial pH, the initial concentration , the electrode spacing , the decrease of the initial conductivity , the output power , the increase of the air velocity , the Reactive Red 195 removal . Add Fe2 and H2O2 removal of Reactive Red 195 will improve if you add Fe2 excessive Reactive Red 195 removal efficiency decreased . Add Cu2 active removal of Red 195 , the first decline after rising . Degradation process , Reactive Red 195 solution pH gradually to reduce conductivity are on the rise . After 21 minutes of discharge , the solution TOC removal rate reached 52.51% . Generation of H2O2, O3 can be detected in the discharge process , while also generates Cl - , SO42- , NO3 .