Abstract:

Advanced treatment of high-viscosity petrochemical wastewater was studied with the oxidation method by Fenton’s reagent as oxidant and the oxidation mechanism and kinetics were analyzed.According to the results from a series of single-factor experiments, it was observed that the control parameters in the oxidation process had different effects on COD removal rate.Through comparing those experimental results, a desirable COD removal rate of 62.00% was obtained at initial mass ratio R（=H₂O₂/COD）=1.52, molar ratio M（=H₂O_2/Fe²⁺）=10∶1, initial pH 3.0 and temperature of 25℃.A kinetic study was carried out by using a modified pseudo-first-order model with the reaction constant of k computed by multiple regression analysis.The experiments performed at different temperatures allowed the calculation of the Arrhenius equation parameters and the global activation energy E_a (25.5 kJ·mol^-1）for the pseudo-first-order reaction.

Key words: FONT-FAMILY: Calibri,sans-serif, mso-bidi-font-size: 11.0pt, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-fareast-font-family: 宋体, mso-hansi-font-family: 宋体">Fenton FONT-FAMILY: 宋体, mso-bidi-font-size: 11.0pt, mso-ascii-font-family: Calibri, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">试剂；稠油石化废水；FONT-FAMILY: Calibri,sans-serif, mso-bidi-font-size: 11.0pt, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-fareast-font-family: 宋体, mso-hansi-font-family: 宋体">CODFONT-FAMILY: 宋体, mso-bidi-font-size: 11.0pt, mso-ascii-font-family: Calibri, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">去除；深度处理；动力学

摘要：

为深度处理稠油石化废水，研究了以Fenton试剂为氧化剂的氧化处理方法，并对氧化机理及动力学理论进行分析。通过一系列单因素实验研究结果表明，Fenton氧化过程中各个控制参数对COD去除率均有不同的影响。综合比较各个实验结果发现，当体系中质量比R（=H₂O₂/COD）=1.52、摩尔比M（=H₂O₂/Fe²⁺）=10∶1、初始pH=3.0、氧化温度T=25℃时，氧化后COD去除效率为62.00%。以准一级反应动力学方程为模型，对研究中的氧化过程进行了多因素的动力学分析。通过多元线性回归分析模拟得到反应速率常数k表达式。同时根据不同温度下的反应速率常数初步计算出氧化过程的阿累尼乌斯方程参数和准一级反应的活化能E_a（25.5kJ·mol^-1）。

关键词: FONT-FAMILY: Calibri,sans-serif, mso-bidi-font-size: 11.0pt, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-fareast-font-family: 宋体, mso-hansi-font-family: 宋体">Fenton FONT-FAMILY: 宋体, mso-bidi-font-size: 11.0pt, mso-ascii-font-family: Calibri, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">试剂；稠油石化废水；FONT-FAMILY: Calibri,sans-serif, mso-bidi-font-size: 11.0pt, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-fareast-font-family: 宋体, mso-hansi-font-family: 宋体">CODFONT-FAMILY: 宋体, mso-bidi-font-size: 11.0pt, mso-ascii-font-family: Calibri, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">去除；深度处理；动力学