Fe/AC催化过氧化氢降解双酚A

传统Fenton反应存在对液相pH要求较高、Fe³⁺回收困难以及难以重复使用等问题。基于"活性离子固载化,酸性环境局部化"的设计思路,通过对活性炭(AC)表面酸化改性,制备得到载铁活性炭(Fe/AC)催化剂。研究了Fe/AC制备工艺与其性能之间的关系,结果表明,在载Fe³⁺量44.05 mg·g^-1、煅烧温度200℃的制备工艺下可得到催化活性较高、稳定性好的Fe/AC催化剂。用性能优良的Fe/AC催化H₂O₂降解双酚A(BPA),其较佳催化反应条件为:反应时间60 min、反应温度20℃、溶液pH值为4.0≤pH≤8.0、Fe³⁺/H₂O₂摩尔比为0.007～0.012、30% H₂O₂用量为0.04 ml H₂O₂·(mg BPA)^-1。本工作制备得到的Fe/AC催化剂具有较好的重复使用性能,在实际废水处理领域具有较大的应用前景。

Catalytic wet oxidation of bisphenol A with hydrogen peroxide over Fe/AC catalyst

There are some problems in the traditional Fenton process,such as narrower range of pH,and the difficulties to recovery Fe³⁺ and to reuse it.Based on the design idea of "immobilizing active ions and localizing acidic environment",Fe/AC catalysts were prepared by acidifying surface of activated carbon and then loading Fe³⁺ on the modified AC,to study the relationship between Fe/AC catalyst performance and preparation parameters.The results show that Fe/AC catalyst with higher activity and stability are prepared at the conditions of Fe³⁺loading amount 44.05 mg·g^-1 and calcination temperature 200℃.The degradation of bisphenol A(BPA),an environmental hormone(endocrine-disrupting chemical),was conducted using the Fe/AC catalyst prepared at these optimum conditions,and the results show that the optimal conditions for degradation of BPA are as follows:reaction time 60 min,temperature 20℃,pH 4.0 to 8.0,Fe³⁺/H₂O₂ molar ratio 0.007—0.012,and 30% H₂O₂ dosage 0.04 ml·(mg BPA)^-1.The Fe/AC catalyst prepared exhibits excellent performance for reutilization,showing greater prospect for application in treating wastewater.