摘要：

采用Fenton法处理避蚊胺（DEET）废水，以Fe²⁺浓度、H₂O₂投加量、pH和反应时间为影响因素，通过响应曲面法对处理过程进行优化设计，得到二次数学模型、各因素之间的交互作用以及最佳反应条件。预测的最佳条件：pH为3.0、Fe²⁺浓度为0.25 mmol/L、H₂O₂投加量为1.15 mmol/L、反应时间38 min，在此条件下DEET降解率为91.45%，与拟合二次回归模型预测值（92.31%）基本吻合。由GC-MS分析得到Fenton法降解DEET的5种中间产物，并推测DEET可能的降解途径。

关键词: 避蚊胺废水, 响应曲面法, Fenton, 降解

Abstract:

The Fenton process was applied to treat the DEET wastewater. The optimum condition for the degradation of DEET was identified via response surface methodology. Taking Fe²⁺ concentration, H₂O₂ dosage, initial pH and reaction time as influential factors, the treatment process was optimized by response surface method, and the quadratic mathematical model, interaction between various factors and optimal reaction conditions are obtained. The predicted optimum conditions were as follow:the initial pH=3.0, Fe²⁺ concentration 0.25 mmol/L, H₂O₂ dosage 1.0 mmol/L, and reaction time 38 min. Under these conditions, the DEET degradation rate was 91.45%, which was basically complies with the predicted value(92.31%) of fitted quadratic regression model. Five intermediate products of DEET degradation by Fenton method were obtained by GC-MS analysis, and the possible degradation pathway of DEET was speculated.

Key words: DEET wastewater, response surface methodology, Fenton, degradation

中图分类号: 

• X703