Study on purification of acetone gas by UV/Fenton

Abstract

VOCs was one of main air pollutants. Fenton reaction was concerned because of its oxidation, high speed and high efficiency. In this paper, the Fenton reagent combined with UV was used to purify acetone gas, and the effect factors was studied. The results showed that the removal efficiency of acetone gas was highest, up to 90.2%, when pH value was about 3, oxidation reduction potential was 480mV. The removal rate of acetone gas increased nearly 5% when UV was added on Fenton reagent. Introduction Volatile organic compounds (VOCs) were the common air pollutants emitted by the petroleum and chemical industry which affect public health and welfare owing to their toxicity potential, carcinogenicity and stability . Recently emission control of VOCs has become a major concern in air pollution prevention. Treating effluent gas including VOCs to harmless level is an arduous process . Therefore, the treatment and recovery of VOCs were paid more attentions in the world. The control technologies of VOCs are usually divided into oxidation method, biological method ,absorption method, adsorption method and Plasma method [6] and so on. Because VOCs have the characteristics of wide sources and complex components, so in the practical application, single technology is usually difficult to achieve VOCs effective purification, so the combined technology has become the current developing direction. Chemical oxidation is concerned because of its oxidation, high speed and high efficiency . The Fenton reagent is firstly applied in waste-water treatment, which is one of the advanced oxidation processes, is recognized as a powerful photo-catalytic degradation technology . Now days, the photo-Fenton reaction has been extensively studied. It may offer a promising technology even in the effluent gas treatment for VOCs owing to its greater efficiency . In this paper, acetone gas was selected as objective VOCs pollutant, Fenton reagent was used to oxidate acetone; the combination method of the absorption with chemical oxidation was studied.