Organic dye removal from aqueous solution by pulsed discharge on the pinhole

Various active chemical species such as hydroxyl radicals, oxygen radical, hydrogen peroxide and ozone etc. can be produced by pulsed discharge. These active species can remove organic pollutants from the aqueous phase effectively. In present work pulsed discharge was formed on the pinhole of an insulating plate which was inserted between two plate electrodes. The characteristic of methyl orange decoloration by the discharge was investigated. The results of experimentation showed that peak voltage, pulsed frequency, initial solution conductivity and gas species impact the decoloration rate of the methyl orange (MO) significantly. The decoloration rate of MO solution is increased with increasing of the peak voltage, pulsed frequency, and decreasing initial solution conductivity. When the MO solution was treated with different gases bubbling, different decoloration rate was obtained and the order of decoloration rate is: oxygen > air > nitrogen.

[1]  Sun Cheng,et al.  Microwave assisted rapid and complete degradation of atrazine using TiO(2) nanotube photocatalyst suspensions. , 2007, Journal of hazardous materials.

[2]  T. Ohshima,et al.  Decoloration of electrostatically atomized organic dye by the pulsed streamer corona discharge , 2005 .

[3]  Ming-hua Zhou,et al.  Synergistic effects of liquid and gas phase discharges using pulsed high voltage for dyes degradation in the presence of oxygen. , 2005, Chemosphere.

[4]  Bruce R. Locke,et al.  Electrohydraulic Discharge and Nonthermal Plasma for Water Treatment , 2006 .

[5]  Masayuki Sato,et al.  Oxidative decoloration of dyes by pulsed discharge plasma in water , 2003 .

[6]  W. C. Finney,et al.  Formation of hydroxyl radicals, hydrogen peroxide and aqueous electrons by pulsed streamer corona discharge in aqueous solution , 1995 .

[7]  Masayuki Sato,et al.  Decoloration of Organic Dye in Water by Pulsed Discharge Plasma Generated Simultaneously in Gas and Liquid Media , 2005 .

[8]  Masayuki Sato,et al.  Degradation of phenol in water using a gas–liquid phase pulsed discharge plasma reactor , 2007 .

[9]  J. S. Clements,et al.  Preliminary Investigation of Prebreakdown Phenomena and Chemical Reactions Using a Pulsed High-Voltage Discharge in Water , 1987, IEEE Transactions on Industry Applications.

[10]  J. S. Clements,et al.  Oxidative Processes Occurring When Pulsed High Voltage Discharges Degrade Phenol in Aqueous Solution , 2000 .

[11]  Bing Sun,et al.  Use of a pulsed high-voltage discharge for removal of organic compounds in aqueous solution , 1999 .

[12]  Xingxing Cheng,et al.  Kinetics of decolorization of azo dye by bipolar pulsed barrier discharge in a three-phase discharge plasma reactor. , 2007, Journal of hazardous materials.

[13]  Bing Sun,et al.  Optical study of active species produced by a pulsed streamer corona discharge in water , 1997 .

[14]  Bing Sun,et al.  NON-UNIFORM PULSE DISCHARGE-INDUCED RADICAL PRODUCTION IN DISTILLED WATER , 1998 .

[15]  Ming-hua Zhou,et al.  Degradation of 4-chlorophenol in different gas-liquid electrical discharge reactors , 2007 .

[16]  Jeyong Yoon,et al.  Oxidative degradation of dimethylsulfoxide by locally concentrated hydroxyl radicals in streamer corona discharge process. , 2006, Chemosphere.

[17]  P. Šunka,et al.  Pulse electrical discharges in water and their applications , 2001 .

[18]  M. Belhadj,et al.  Gliding arc plasma assisted photocatalytic degradation of anthraquinonic acid green 25 in solution with TiO2 , 2007 .

[19]  B. Sun,et al.  Characteristics of ultraviolet light and radicals formed by pulsed discharge in water , 2006 .