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溴酸钾对二茂铁(Fc)非均相Fenton效能的影响

Keywords: 非均相,Fenton,二茂铁,KBrO3

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Abstract:

研究了KBrO3对二茂铁(Fc)非均相Fenton效能的影响,深入考察了KBrO3对体系中Fc溶解、H2O2分解和羟基自由基(·OH)生成的影响。结果表明,KBrO3的加入对不同反应阶段Fc/Fenton体系的效能均有明显的促进作用,初始阶段主要是由于KBrO3对·OH产生的促进作用所致,后期主要是由于KBrO3促进了体系中Fc的溶解,使得体系中溶解态的Fc催化的均相Fenton反应的比例增加,体系中H2O2的分解加快,·OH的表观生成率增加,进而促进了反应的进行。无KBrO3添加,pH=4,MB初始浓度为10mg/L,Fc的量为1.6×10-3mol/L,H2O2/MB=3.14时,45min时,MB的剩余率为9.1%,105min时为0。当KBrO3的用量为3×10-4mol/L时,反应45min后MB的去除率即可达到100%。随着KBrO3浓度的增加,其对Fc/Fenton效能的促进作用增强。

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