芬顿氧化法处理水中酸性品红的研究
Oxidation of acid magenta in aqueous solution by Fenton’s reagent
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摘要: 研究了酸性品红在Fenton体系中的降解过程，反应30 min后，在［Fe2+］0=0.06 mmol/L、［H2O2］0=0.3 mmol/L、pH=3、T=30℃的条件下，初始浓度为20 mg/L的酸性品红的去除率达到97％以上。升高反应温度，有利于Fenton体系中酸性品红的降解，但影响并不显著。根据不同温度下的速率常数，并结合Arrhenius方程求出了Fenton试剂降解酸性品红的反应活化能，仅为11.63 kJ/mol。C1–的存在对酸性品红在Fenton体系中的降解表现出明显的阻碍作用，并且随着C1–浓度的增加，抑制作用越来越大；SO2-4和NO-3的存在也降低了Fenton试剂的氧化性能。Abstract: The degradation of acid magenta in aqueous solution by Fenton’s reagent was studied. After 30 min, the 97% removal of acid magenta in water (pH=3, T=30℃) was achieved when the initial concentrations of Fe2+, H2O2 and acid magenta were 0.06 mmol/L, 0.3 mmol/L and 20 mg/L, respectively. Increasing the reaction temperature was beneficial for the degradation of acid magenta, but not obvious. Based on the Arrhenius equation, the activation energy (Ea) was calculated to be 11.63 kJ/mol from rate constants at different temperatures. The degradation of acid magenta by Fenton’s reagent was inhibited by the presence of C1–, and the rate of acid magenta removal decreased with increasing of the concentration of C1–. The presence of SO2-4 and NO-3 also decreased the oxidative activity of Fenton’s reagent.
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Key words:
- Fenton /
- acid magenta /
- degradation
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