摘要
在初始pH=3的条件下研究了甲基橙在非均相Fenton体系和非均相US-Fenton体系中的降解动力学。研究内容包括表观动力学方程和活化能。研究表明,超声的引入可以提高甲基橙的降解效率和降解速率。对比非均相Fenton和非均相US-Fenton体系中的表观动力学方程表明超声的引入可以提高反应速率常数,此外,还可以提高H2O2的利用率。通过对比分析,超声的引入可以降低反应所需的活化能,在超声的存在下,甲基橙的氧化活化能为25.12 kJ/mol,而在没有超声的条件下,需要的活化能为41.49 kJ/mol。
Methyl orange degradation at pH=3 by heterogeneous Fenton and heterogeneous US-Fenton processes was kinetically investigated in this study.This research included kinetic equations and activation energy.The results show that removal efficiency and degradation rate were accelerated by the use of ultrasound irradiation.Comparing the overall rate equations for Methyl orange degradation by heterogeneous Fenton and heterogeneous US-Fenton processes,it was found that the use of ultrasound irradiation can improve rate constant and H2O2 utilization rate.Through analysis revealed that the use of ultrasound irradiation reduced the energy barrier of the reaction.The activation energy for the oxidation of methyl orange in the presence of ultrasound was found to be 25.14 kJ/mol,while in the silent oxidation process was 41.49 kJ/mol.
出处
《环境工程学报》
CAS
CSCD
北大核心
2012年第10期3673-3678,共6页
Chinese Journal of Environmental Engineering
基金
校研究生科研创新项目(091120024)
