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《Chinese Journal of Environmental Engineering》 2007-01
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Experimental studies on chlorophenol decomposition with coupling ultrasound and electrocatalysis process

Chen Xia Wang Jiade Mei Yu Chen Jianmeng(College of Biological and Environmental Engineering,Zhejiang University of Technology,Hangzhou 310032)  
2-chlorophenol(2-CP) and 4-chlorophenol(4-CP) were treated respectively in coupled ultrasound/electrocatalysis(US/EC) systems.The synergistic effects and influencing factors on chlorophenol decomposition were investigated.It was found that the removal efficiency was markedly higher in the coupled US/EC process than in the electrocatalysis process because of that the enhancement factors f were 1.325 and 1.509,respectively.The experimental results indicated that enhancement of current density could increase the removal efficiency of chlorophenol,the increment of apparent reaction rate constant were 1.28×10~(-5)s~(-1) and 1.82×10~(-5)s~(-1).High pH was advantageous to chlorophenol decomposition,apparent reaction rate constant were 9.22×10~(-5)s~(-1) and 11.02×10~(-5)s~(-1) at pH of 9.08.The decomposition efficiency of 2-CP increased more remarkably with the increase of electrolyte concentration than the one of 4-CP,the apparent reaction rate constant of 2-CP rose from 7.70×10~(-5)s~(-1) to 16.03×10~(-5)s~(-1).In a word,chlorophenol could be decomposed in the synergistic US/EC process.
【Fund】: 浙江省科技厅重点资助项目(2005C23056)
【CateGory Index】: X703
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