摘要
考察了微量Mn2+离子在NaHCO3溶液中催化H2O2氧化降解有机污染物的性能.结果表明,NaHCO3,MnCl2和H2O2浓度分别为25,0.1和100mmol/L时,在25oC下反应180min后亚甲基蓝可完全脱色,化学耗氧量和总有机碳去除率分别达到44.0%和13.8%.该催化体系对甲基橙、罗丹明B以及垃圾渗滤液等都有较好去除效果.紫外-可见光谱分析及反应动力学测试表明,MnIV=O是该催化体系主要活性物种.
Catalytic degradation of organic pollutants in a sodium bicarbonate solution with Mn2+ ion (0.004-0.1 mmol/L) as the catalyst has been studied using H2O2 as the oxidant.Complete decoloration of methylene blue was achieved in 180 min with 44.0% chemical oxidation demand removal at 25 oC at the NaHCO3,MnCl2 and H2O2 concentrations of 25,0.1,and 100 mmol/L,respectively.The total organic carbon measurement indicated that 13.8% of the carbon was mineralized.The Mn2+/HCO3-+ H2O2 system also showed high ability for oxidative degradation of methyl orange,rhodamine B,and even landfill leachate.The analysis of UV-Vis spectroscopy and reaction kinetics indicated that the MnIV=O intermediate is the key active species in methylene blue degradation.
出处
《催化学报》
SCIE
EI
CAS
CSCD
北大核心
2010年第8期1031-1036,共6页
基金
中国博士后科学基金(20080440938)
宁波市科研院所专项资金项目(2009A80001)
关键词
碳酸氢钠
过氧化氢
二价锰离子
降解
染料
垃圾渗滤液
sodium bicarbonate
hydrogen peroxide
manganese(II) ion
degradation
dye
landfill leachate