【摘 要】
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Degradation of o-chloronitrobenzene wastewater was experimentally investigated at a three-dimensional electrode(TDE) with granular activated carbon as the parti
【机 构】
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College of Materials Science and Engineering
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Degradation of o-chloronitrobenzene wastewater was experimentally investigated at a three-dimensional electrode(TDE) with granular activated carbon as the particle electrode,graphite as the anode,and stainless steel plate as the cathode.The kinetic model of o-chloronitrobenzene degradation was studied,and the effects of pH,electrolysis time,particle electrode,electrolyte concentration,and initial concentration of the solution on degradation efficiency were investigated to determine the optimal operating conditions.The degradation of o-chloronitrobenzene by oxidation at the TDE was monitored by chemical oxygen demand(COD) measurements,UV-Vis absorption,and high performance liquid chromatography(HPLC).COD degradation by electrochemical degradation followed pseudo-first order kinetics with respect to the concentration of o-chloronitrobenzene solutions.Optimal reaction conditions included 15 g of activated carbon as the particle electrode,400 mg/L o-chloronitrobenzene solution containing 0.10 mol/L Na2SO4,pH=3,and 60 min of electrolysis.The UV-Vis absorption spectra and HPLC results illustrate that the benzene ring in o-chloronitrobenzene was rapidly broken down to form aliphatic substances through electrochemical degradation.COD degradation was approximately 98.5％ at optimal conditions.
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