微波促进Fe@MCM-48催化K_2S_2O_8降解甲基橙废水  

Degradation of methyl orange wastewater by microwave assisted catalysis of potassium persulfate with Fe@MCM-48

作　　者：占昌朝[1,2] 陈义[1] 严平[1,2] 谢宝华[1,2] 曹小华[1,2] 夏祥[1] 

机构地区：[1]九江学院化学与环境工程学院,九江332005 [2]江西省生态化工工程技术中心,九江332005

出　　处：《环境工程学报》2015年第7期3134-3140,共7页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(21161009;21367014;21274131;51273178);江西省自然科学基金项目(2013BAB203023);江西省教育厅科技基金项目(GJJ2013723;KJLD13092));江西省大学生创新创业计划项目(201311843029)

摘　　要：以正硅酸四乙酯(TEOS)为起始原料,硝酸铁为掺杂剂,十六烷基三甲基溴化铵(CTAB)为结构导向剂,经沉淀法成功制备了Fe掺杂MCM-48分子筛(Fe@MCM-48),并采用SEM、EDS、XRD、BET、FTIR对其进行了表征。研究了微波促进Fe@MCM-48催化K2S2O8降解甲基橙废水的行为,考察了溶液初始pH、微波功率、微波时间、Fe@MCM-48及K2S2O8用量等因素对废水脱色效果的影响。结果表明,微波-K2S2O8-Fe@MCM-48体系能高效快速降解废水中的甲基橙,在50 m L初始pH为7、质量浓度为500 mg/L的甲基橙废水中,微波辐射功率280 W、微波辐射10 min、Fe@MCM-48用量0.06 g、K2S2O8浓度为0.491mmol/L的较佳处理工艺条件下,色度和及TOC去除率分别为97.6%和43.7%,微波、K2S2O8、Fe@MCM-48体系对甲基橙废水降解效果明显,产生了协同效应。Iron incorporated into MCM-48 molecular sieve（Fe@MCM-48） was successfully synthesized by precipitation method using cetyltrimethylammonium bromide（CTAB） as a structural directing agent,and tetraethylorthosilicate（TEOS） as starting raw materials and ferric nitrate as dopant.And then the samples were characterized by scanning electron microscopy（SEM）,energy disperse spectrum（EDS）,X-ray diffraction（XRD）patterns,N2 adsorption/desorption measurements（BET） and Fourier transform infrared spectroscopy（FTIR）.Catalytic degradation performance of methyl orange（MO） solution in microwave-assisted Fe@MCM-48/K2S2O8 system was studied.The effects of different factors including solution initial pH value,microwave power,radiated time,dose of Fe@MCM-48 and potassium persulfate on the degradation of MO were studied.The results showed that the MO was degraded rapidly and efficiently.For 50 m L solution with initial pH of 7 and MO concentration of500 mg/L,97.6% of color and 43.7% of TOC were removed,under the better reaction conditions of the microwave radiation power input of 280 W,the microwave radiation time of 10 min,Fe@MCM-48 mass of 0.06 g and K2S2O8 concentration of 0.491mmol/L.Degradation process of MO wastewater by microwave,potassium persulfate and Fe@MCM-48 have excellent results and synergetic effect.

关 键 词：微波 FE MCM-48分子筛 过硫酸钾 甲基橙 协同效应 

分 类 号：X786[环境科学与工程—环境工程]