摘要
以钒钛磁铁矿为原料,通过对其改性得到具有催化活性高、结构稳定、成本低廉的催化剂(M-VTMag)。通过XRD、FTIR的表征发现改性后钒钛磁铁矿晶体结构无明显变化,且表面覆盖了硫酸铁盐成分。通过M-VTMag催化过一硫酸盐对实验室有机废水进行处理,探讨了M-VTMag投加量、过一硫酸盐(PMS)投加量、pH值、反应温度和反应时间等因素对有机废水COD去除率的影响。结果表明,每100 mL废水,M-VTMag投加量为0.05 g, PMS投加量为0.3 g,反应温度为60℃,反应时间为60 min, COD最大去除率为53.06%。M-VTMag稳定性实验表明,经煅烧处理后的催化剂重复使用3次后COD的去除率下降不明显,稳定性好,具有重复利用价值。多种体系对比研究和降解的机理的初步探讨,结果表明,M-VTMag+PMS是最佳催化氧化体系,该体系主要起到降解作用的活性自由基是SO-4·。
Vanadium-titanium magnetite was modified to obtain M-VTMag with high catalytic activity,structural stability,and low cost.XRD and FTIR analyses revealed no significant changes in the magnetite crystal structure,with the surface covered by iron sulfate components.Treatment of high-concentration organic wastewater from Panzhihua College’s basic chemistry laboratory using heterogeneous catalytic persulfate was conducted to investigate the influence of M-VTMag dosage,persulfate dosage,pH,reaction temperature,and reaction time on COD removal efficiency.The results showed that for every 100 mL of wastewater,the dosage of M-VTMag was 0.05 g,the dosage of PMS was 0.3 g,the reaction temperature was 60℃,the reaction time was 60 min,the maximum COD removal rate reached 53.06%.The experiment of M-VTMag stability showed that after calcined catalyst was reused for three times,the removal rate of COD did not decrease obviously,and the stability was good.Comparative study of various systems and preliminary study on the mechanism of degradation.The results showed that M-VTMag+PMS was the best catalytic oxidation system,and the main active free radical of this system is SO-4·.
作者
梁鸿霞
李涛
LIANG Hongxia;LI Tao(Public Experimental Teaching Center of Panzhihua University,Panzhihua 617000,China;College of Biological and Chemical Engineering,Panzhihua University,Panzhihua 617000,China)
出处
《应用化工》
北大核心
2025年第11期2873-2877,2883,共6页
Applied Chemical Industry
基金
四川省重点实验室项目(SC-FQWLY-2021-Y-04)
攀枝花学院校级培育项目(14)。
关键词
钒钛磁铁矿
过一硫酸盐
有机废水
vanadium titanium magnetite
peroxymonosulfate
organic wastewater
