摘要
利用MW/H2O2高级氧化技术处理水中微量硝基苯(NB),研究了该工艺对硝基苯的去除效果,分析了微波功率、H2O2投加量、硝基苯初始质量浓度、水中普遍存在的腐植酸和碳酸氢根对MW/H2O2工艺降解硝基苯的影响。结果表明,MW/H2O2工艺在处理2 L初始质量浓度为300μg.L-1的硝基苯时效果显著,32 min后NB去除率就达88.5%,远高于单独H2O2氧化或单独的微波辐射。试验中该工艺最佳微波功率为300 W,随H2O2投加量和NB初始质量浓度的增加,MW/H2O2对NB的去除率先增后减,但单位H2O2降解NB的量始终随着NB初始质量浓度的增加而增大。腐植酸对MW/H2O2氧化降解硝基苯有显著的抑制作用,但HCO3-却对硝基苯的氧化降解有一定的促进作用。
The removal of trace nitrobenzene（NB） in water using the microwave-enhanced H2O2-based（MW/H2O2） process and the influencing factors were investigated.Effects of microwave power,H2O2 dosage,NB initial concentration,humic acid and HCO3-on the efficiency degradation of NB were studied.The results showed that MW/H2O2 process in dealing with 2 L wastewater was favorable for enhancing the removal of NB.The NB removal rate reached 88.5% at NB initial concentration of 300 μg·L-1 for a 32 min reaction time,which was much higher than the situations when microwave irradiation process and H2O2 oxidation were used separately.The optimum MW power of this experiment was 300 W.The removal of NB increased firstly then decreased with the increase of H2O2 dosage and initial concentrations of NB,while the amount of NB degraded by unit H2O2 was directly proportional to initial concentrations of NB.Humic acid significantly inhibited the removal of NB.However,HCO3-,usually an inhibitor present in natural water,enhanced the removal of NB over a certain range.
出处
《水处理技术》
CAS
CSCD
北大核心
2011年第8期104-108,共5页
Technology of Water Treatment
基金
高排放标准氧化沟处理流程升级改造关键技术研究与工程示范旅游城市周期性冲击负荷调控技术研究(2008ZX07317-02-03E)
教育部科学研究重点项目:西部城镇污水管网系统抗冲击负荷强化技术研究(210170)
关键词
微波
过氧化氢
硝基苯
腐植酸
microwave
hydrogen peroxide
nitrobenzene
humic acid
