摘要
采用MW-GAC-H2O2工艺(微波-活性炭颗粒-过氧化氢)降解水中微量硝基苯,研究了硝基苯初始质量浓度、pH、HCO3-和腐植酸对MW/GAC/H2O2降解硝基苯的动力学行为的影响。结果表明,硝基苯初始质量浓度越大,硝基苯降解速率越小;初始溶液pH为8时,硝基苯的降解速率最高;投加适量HCO3(-100～200mg/L)、腐植酸均可促进系统降解硝基苯。在硝基苯初始质量浓度为200μg/L、微波功率为300W、GAC和H2O2投加量分别为4g/L和10mg/L的试验条件下反应21min,MW-GAC-H2O2工艺降解硝基苯的速率为0.052 1 min-1,反应过程遵循1级反应动力学方程。
The MW/GAC/H2OE（Microwave- Granular activated carbon- Hydrogen peroxide）process was used to degrade trace nitrobenzene in the water. The effects of operation parameters such as initial concentrations of NB, pH values, HCOf and humic acid on kinetics of NB degradation were studied. Results showed that the rate of NB reduction was decreased with the increase of initial concentrations of NB; when the pH of initial solution was 8, the removal ratio of NB was best; Defined amount of riCO; （100-200 mg/L） and HA were favorable for the removal ofnitrobenzene. When the NB initial concentration was 200 μg/L, GAC dosage of 4 g/L and H2O2 dosage of 10 mg/L, the rate of NB reduction was 0.052 1 min^-1 by MW/GAC/H2O2 process, the reaction rate data fits well to the first-order reaction.
出处
《水处理技术》
CAS
CSCD
北大核心
2013年第6期83-86,93,共5页
Technology of Water Treatment
基金
国家自然科学基金项目(51268008
21207024)
教育部科学技术研究重点项目(教技司[2010]114号
210170)
广西高校优秀人才资助计划项目(桂教人[2010]65号)
广西科学研究与技术开发计划项目(桂科转1298009-17)
关键词
微波
活性炭颗粒
过氧化氢
硝基苯
羟基自由基
microwave
granular activated carbon
hydrogen peroxide
nitrobenzene
hydroxyl radicals
