4-Chlorophenol degradation by pulsed high voltage discharge coupling internal electrolysis.
A system of pulsed high voltage discharge coupling internal electrolysis (PHVDCIE) in water has been developed to remove 4-chlorophenol (4-CP). The hydrogen peroxide formed by discharge was little utilized by 4-CP degradation in the sole discharge system, but most of the hydrogen peroxide could be utilized in the PHVDCIE system to form hydroxyl radicals for the production of Fe(2+). The Fe(2+) was generated in the cell reaction and was reacted with the hydrogen peroxide through the Fenton's reaction. The formation rate of hydroxyl radical was increased in the PHVDCIE system. It was 5.28 x 10(-7)mol L(-1)s(-1) with bubbling oxygen but it was 1.49 x 10(-7)mol L(-1)s(-1) in the sole discharge system. With increase in the yields of hydroxyl radical, the 4-CP removal was sped up. The removal efficiency of 4-CP was improved to more than 90% correspondingly by 36 min discharge in the PHVDCIE system. With the promotion of 4-CP degradation, more intermediate products such as formic, acetic and oxalic acid were produced.
Yin
Xiangli
X
College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, Jiangsu, China.
Bian
Wenjuan
W
Shi
Junwen
J
D019342:Acetic Acid; D000891:Anti-Infective Agents, Local; D002733:Chlorophenols / Q000737:chemistry*; D004572:Electrolysis / Q000295:instrumentation / Q000379:methods*; D005561:Formates; D006861:Hydrogen Peroxide; D017665:Hydroxyl Radical; D007501:Iron; D019815:Oxalic Acid
D000891:Anti-Infective Agents, Local; D002733:Chlorophenols; D005561:Formates; C030544:formic acid; D017665:Hydroxyl Radical; C029107:4-chlorophenol; D019815:Oxalic Acid; D006861:Hydrogen Peroxide; D007501:Iron; D019342:Acetic Acid