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KMID : 1024520130220070915
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Journal of the Environmental Sciences
2013 Volume.22 No. 7 p.915 ~ p.923
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Phenol Removal Using Oxygen-Plasma Discharge in the Water
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Park Young-Seek
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Abstract
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Decomposition of non-biodegradable contaminants such as phenol contained in water was investigated using a dielectric
barrier discharge (DBD) plasma reactor in the aqueous solutions with continuous oxygen bubbling. Effects of various
parameters on the removal of phenol in aqueous solution with high-voltage streamer discharge plasma are studied. In order to choose plasma gas, gas of three types (argon, air, oxygen) were investigated. After the selection of gas, effects of 1st voltage(80 ～220 V), oxygen flow rate (2 ～7 L/min), pH (3 ～11), and initial phenol concentration (12.5 ～100.0 mg/L) on phenol degradation and change of UV254 absorbance were investigated. Absorbance of UV254 can be used as an indirect indicator of phenol degradation and the generation and disappearance of the non-biodegradable organic compounds. Removal of phenol and COD were found to follow pseudo first-order kinetics. The removal rate constants for phenol and COD of phenol were 5.204 × 10-1 min-1 and 3.26 × 10-2 min-1, respectively.
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KEYWORD
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Dielectric barrier discharge, Water plasma, Phenol degradation, UV254, Wastewater treatment
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