高铁酸盐氧化降解水中苯酚的动力学及机理研究

摘要

The removal efficiency and main influential factors of phenol oxidated by home-made ferrate at different conditions were studied.The results proved that potassium ferrate could remove phenol efficiently.The factors,which influenced removal efficiency,included the quantity of potassium ferrate,pH,mixing round continuously,reaction temperature,and reaction time.The quantity of potassium ferrate is the most important factor.The removal efficiency is best at pH=9～10.Mixing round continuously and increasing reaction temperature could improve reaction rate and couldn't improve the degradation rate of phenol.The degradation course of phenol obeyed the one order kinetic equation.The mechanism of degradation was also studied.%以自制高铁酸钾(K2FeO4)为原料,探讨了影响高铁酸盐氧化降解苯酚的主要因素,并研究了苯酚降解的动力学特征和反应机理.结果表明,高铁酸盐加入量、pH值、持续搅拌、反应温度、反应时间都影响苯酚去除效果.其中高铁酸盐加入量是影响苯酚去除效果的关键因素,高铁酸盐氧化降解苯酚的最佳pH值范围为9～10.持续搅拌和提高反应温度只影响苯酚降解速率而不影响苯酚降解率.苯酚的降解过程遵循一级反应动力学模型.苯酚被高铁酸盐氧化生成CO2、H2O以及一部分难矿化的有机物.