Abstract:

A new type of bentonite/Fe₃O₄/Fe⁰ composite catalyst was prepared by in-situ oxidation-precipitation method. Then it was used as a heterogeneous Fenton-like catalyst for the treatment of beta-cyfluthrin simulated wastewater. SEM, TEM, XRD and VSM characterization results showed that the prepared catalysts Fe₃O₄ and Fe⁰ had stable structures, good magnetic properties and easily recyclable ability. Degradation experiment results showed that when the ratio of m(Fe⁰):m(Fe₃O₄) was 0.8, initial solution pH was 3.0, 30%H₂O₂ dosage was 0.25 mL, and catalyst dosage was 0.40 g, the COD removal rate in 100 mL simulated wastewater was 73.41% after reaction for 40 min. Bentonite/Fe₃O₄/Fe⁰ is a new catalyst showing excellent stability and reusability.

Key words: beta-cyfluthrin, heterogeneous Fenton method, bentonite/Fe₃O₄/Fe⁰ catalyst

摘要：

采用氧化共沉淀法制备膨润土/Fe₃O₄/Fe⁰新型复合催化剂，并将其作为非均相类Fenton催化剂应用于高效氟氯氰菊酯农药模拟废水的降解。SEM、TEM、XRD和VSM等的表征结果显示，制备的催化剂Fe₃O₄与Fe⁰结构稳定，有较好的磁性，便于回收利用。降解实验结果表明，对于100 mL模拟废水，在m（Fe⁰）：m（Fe₃O₄）=0.8，初始溶液pH=3.0，30% H₂O₂投加量为0.25 mL，催化剂投加量为0.40 g，反应时间为40 min的条件下，COD去除率为73.41%。膨润土/Fe₃O₄/Fe⁰是一种稳定的新型催化剂，重复利用性能优良。

关键词: 高效氟氯氰菊酯, 非均相Fenton法, 膨润土/Fe₃O₄/Fe⁰催化剂

CLC Number: 

• X703