Several Rules for Treating Phenol Wastewater via Oxidation by O3/UV-formed Radicals

Abstract

Abstract: The treatment of phenol wastewater with an ultraviolet source and an oxone generator by introducing salicylic acid as the capturer is described. The presence of HO^·during the phenol degradation has been proved. The impacts of factors such as acidity and reaction time on the HO^· formation are also discussed. The results demonstrate that HO^· generated from ozone/UV oxidation under a basic condition is the immediate cause of phenol degradation. At room temperature and a pH value of 9.93, the degradation of phenol occurs rapidly within 0.5 min and the removal of phenol(100 mg/L) is above 98.5% within 15 min; in the meantime, the pH value declines gradually with the degradation of phenol. A discussion about the formation and the transformation of the intermediate products during phenol degradation is included.

Key words: Ozone, UV oxidation, Radical, Phenol wastewater, Degradation

LIU Miao, JIAO Xin-qian, WU Di, DIAO Wei-li, ZHANG Yu. Several Rules for Treating Phenol Wastewater via Oxidation by O₃/UV-formed Radicals[J]. Chemical Research in Chinese Universities, 2006, 22(1): 25-28.

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Several Rules for Treating Phenol Wastewater via Oxidation by O₃/UV-formed Radicals

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