Study on Light Degradation of 2,4-dichlorophenoI in Wastewaterby Using Excimer UV Source

摘要

A study on degradation of 2,4-dichlorophenol in aqueous solution using I72nm excimer UV source is reported Degradation products were analyzed by Gas chromatography time-of-flight mass spectrometry. The experiment results show that a low concentration (lmg/L) and a high concentration (lOmg/L) of 2,4-dichlorophenol are directly irradiated separately. By GC-TOFMS technique analysis, the results indicate that under the irradiation the lmg/L of 2,4-dichlorophenol is extremely unstable and decompose completely in 1,5 minutes However, after 10 minutes irradiation on the 10 mg/L of 2,4-dichlorophenol, the degradation products of 2-chlorophenol, phenol, benzenediol and benzoquinone are detected The possible process of the degradation of 2,4-dichlorophenol by excimer UV resource is presented.