BiFeO_3/H_2O_2体系有效降解酸性复红染料废水的研究

Efficient Degradation of Acidic Fuchsin in Simulated Dye Wastewater Using BiFeO_3/H_2O_2 Reagents

以BiFeO_3和H2O2组成非均相类Fenton体系催化降解酸性复红(acidic fuchsin)染料废水。探讨了过氧化氢用量、反应时间、反应温度、催化剂用量、染料初始浓度以及p H值等因素的影响。实验结果显示在过氧化氢体积百分数为0.65%、反应时间为50 min、反应温度为303 K、催化剂用量为0.45 g/L、酸性复红溶液初始浓度为120 mg/L和p H值为7.5的最优条件下,废水脱色率>99%。降解过程动力学的初步研究说明该过程符合一级动力学方程,在303 K时表观速率常数和表观活化能分别为0.1011 min-1、23.04 k J/mol。

Catalytic degradation of acidic fuchsin in simulated dye wastewater was invesugated using BiFeO3/H2O2 reagents. The effects of pH, amounts of consumed catalyst and H2O2, initial concentration of dyes, reaction temperature and time were researched. The experimental results show that the removal efficiency of acidic fuchsin solution （ 120 mg/L） could reach up to 99% when BiFeO3 dosage is 0.45 g/ L, H2O2 dosage is 0.65%, pH value is 7.5, reaction time is 50 min and reaction temperature is 303 K. Kinetic studies of the degradation reaction indicate that the decolorization rate of acidic fuchsin follows the first-order reaction. The at 303 K, respectively. apparent rate constant and activity energy are 0. 1011 min^-1 and 23.04 kJ/mol