CAJ | 학술논문

中性常压条件下研究了不同因素对CuO-H_2O_2矿化模型底物苯酚的影响.引入H_2O_2矿化指数(X)、矿化半衰期(t_(1/2))概念,结合总碳(TOC)去除及氧化剂分解规律,对催化矿化进行分析.结果表明:温度、催化剂、氧化剂、初始TOC质量浓度的增加均能不同程度地加速TOC去除,矿化半衰期t_(1/2)更短.随温度、氧化剂浓度提高,H_20_2矿化指数X先增加后减小,随初始TOC及催化剂质量浓度提高X分别增加和减小.提出了羟基自由基矿化机理,紫外可见分光光谱分析表明底物先被氧化为某些中间产物,再被矿化为CO_2和H_2O.
중성상압조건하연구료불동인소대CuO-H_2O_2광화모형저물분분적영향.인입H_2O_2광화지수(X)、광화반쇠기(t_(1/2))개념,결합총탄(TOC)거제급양화제분해규률,대최화광화진행분석.결과표명:온도、최화제、양화제、초시TOC질량농도적증가균능불동정도지가속TOC거제,광화반쇠기t_(1/2)경단.수온도、양화제농도제고,H_20_2광화지수X선증가후감소,수초시TOC급최화제질량농도제고X분별증가화감소.제출료간기자유기광화궤리,자외가견분광광보분석표명저물선피양화위모사중간산물,재피광화위CO_2화H_2O.
By taking phenol as a model substrate, the influences of different factors on its mineralization with CuO-H_2O_2 were investigated in neutral solution at atmospheric pressure. Peroxide mineralization index (X) and mineralization half-life (t_(1/2)) were adopted. Total organic carbon (TOC) removal and oxidant decomposing rules were also investigated to analyze the catalytic mineralization. The results show that the different degrees of accelerations on TOC removal are observed, and shorter t_(1/2) can be obtained with the increasing of temperature, the concentrations of catalyst, oxidant and initial TOC. X increases first and then decreases with the increasing of temperature, oxidant concentration. However, X increases and decreases respectively with the initial TOC and catalysis concentrations. Hydroxyl radical oxidation mechanism was proposed to elucidate the mineralization. UV-Vis indicates that phenol is oxidized to some medium products, and then mineralized to CO_2 and H_2O.