【摘要】 利用UV/O3法对糠醛废水中的乙酸进行光氧化降解实验.讨论了pH值、光源、阴阳离子等因素对乙酸降解速率的影响.结果表明,以高压汞灯(400 W)为光源,对500 mL浓度为8 mmol/L的乙酸溶液,在温度为(35±2)℃、O3含量为0.1 mg/L,pH值为2.2的条件下,乙酸降解效果最佳.在此条件下,300 min内溶液中乙酸和TOC降解率分别为86%和74%.在所考察浓度范围内,乙酸的降解符合零级动力学模式.更多还原

【Abstract】 Acetic acid is the most important component of furfural wastewater,which was degraded by UV/O3 method.Effects of pH value,light intensity and negative and positive ions on the reaction were investigated.The results show the optimal conditions of the photodegradation reaction of 500 mL of 8 mmol/L acetic acid were pH=2.2,the temperature was(35±2) ℃ and the supply of O3 was 0.1 mg/L under 400 W ultraviolet radiation.Under those conditions,the disposal rates of acetic acid and TOC reached 86% and 74% within 300 min.The degradation course obeys the zero order kinetic equation.更多还原