环境工程学报2018，Vol.12Issue(1)：110-118,9.DOI:10.12030/j.cjee.201705105
基于过碳酸钠的类Fenton体系对亚甲基蓝的降解动力学
Kinetics of degradation of methylene blue in a Fenton-like system based on sodium percarbonate
摘要
Abstract
Sodium percarbonate(SPC) was prepared using low temperature crystallization method and characterized with XRD.SPC was used as oxidant to establish a heterogeneous Fenton system for the removal of methylene blue(MB),and the influences factors and kinetics of the reaction were investigated.The results indicated that 97％ removal of MB can be obtained at 1 min,with initial solution pH in the range from 2 to 10,which indicated that MB can be removed efficiently at fast rates and pH window of SPC/Fe2+ system can be enlarged.The optimal condition was determined to be 0.75 g · L-1FeSO4 · 7H2O,300 mg · L-1SPC,and 99.0％ removal of MB can be reached at 10 min.The removal of MB followed pseudo second-order kinetic and the reaction rate was determined to be 64.50 × 10-3 L · (mol · s)-1,much faster than that 17.83 × 10-3 L · (mol · s)-1of Fenton reaction.Also,the reaction activation energy 16.6 kJ · mol-1 was much lower than that 46.234 kJ · mol-1 of Fenton reaction,indicating that Fenton reaction was easier to occur using SPC instead of H2O2 as oxidant.关键词
过碳酸钠/类Fenton反应/反应速率常数/反应活化能Key words
sodium percarbonate/Fenton-like reaction/reaction rate constants/reaction activation energies分类
资源环境引用本文复制引用
白青青,吴小宁,王倩,李蓉..基于过碳酸钠的类Fenton体系对亚甲基蓝的降解动力学[J].环境工程学报,2018,12(1):110-118,9.基金项目
国家自然科学基金资助项目(51608412) （51608412）
陕西省自然科学基础研究计划项目(2016JQ2034) （2016JQ2034）
