摘要
采用水热法合成了Fe-MCM-41中孔分子筛,紫外、红外及XRD表征显示铁离子已进入中孔分子筛骨架。以H2O2为氧化剂形成类Fenton试剂,实验结果表明,在催化剂加入量为1 g/L、H2O2体积分数为6%、pH为4、反应时间为10h、反应温度为35℃的条件下,处理质量浓度为50 mg/L的2,4-D废水的降解率达94.95%。宏观动力学研究显示,该反应近似为一级反应,反应速率常数、表观活化能分别为0.21667 min-1和26.65 kJ/mol。
The mesoporous molecular sieves Fe-MCM-41 were synthesized via a hydrothermal method,and characterized by X-ray powder diffraction,FTIR and DRS-UV-Vis.The characterization data show that Fe3＋ got into the framework of MCM-41.Catalytic degradation of 2,4-dichloro-phenoxyacetic acid wastewater was investigated by using Fe-MCM-41 catalysts and hydrogen peroxide as Fenton-like reagent.The results indicate that the degradation rate of 2,4-dichloro-phenoxyacetic acid（50 mg/L） reached 94.95% in the presence of Fe-MCM-41（1 g/L） and hydrogen peroxide（6%） at pH of 4 after 10 hours under normal temperature and pressure.Kinetic studies of the catalytic reaction show that the degradation rate of 2,4-dichloro-phenoxyacetic acid nearly followed the first-order reaction,the reaction constant and activity energy respectively are 0.21667 min-1 and 26.65 kJ/mol at 35℃.
出处
《环境工程学报》
CAS
CSCD
北大核心
2012年第11期4102-4106,共5页
Chinese Journal of Environmental Engineering
基金
教育部春晖计划项目(Z2007-1-63007)
