Page 161 - 《精细化工》2023年第1期

第 40 卷第 1 期 精 细 化 工 Vol.40, No.1
2 023 年 1 月 FINE CHEMICALS Jan. 2023

水处理技术与环境保护
Mn 促进 Fe/C 微电解反应速率及降解污染物机理

贾艳萍，丁 雪，杜 飞，张 健，张海丰，张兰河

（东北电力大学 化学工程学院，吉林 吉林 132012）

摘要：为了扩宽铁炭微电解工艺的适用范围及提高处理效率，以铸铁屑、椰壳活性炭为原料，添加 Mn 构建
Fe/Mn/C 三元微电解体系处理甲基橙（MO）模拟染料废水。利用 SEM-EDS、FTIR 及 Raman 光谱分析了 Fe、
Mn 和活性炭表面形貌及元素组成，采用 UV 和三维荧光光谱（EEM）探究了有机物成分的变化，对比了 Fe/Mn/C
和 Fe/C 微电解体系对 MO 的降解效果，揭示了 Fe/Mn/C 三元微电解体系降解 MO 的反应机理和反应动力学。
结果表明，反应后的 Fe、Mn 和炭填料表面存在铁氧化物、铁氢氧化物及锰氧化物，Fe/Mn/C 三元微电解体系
可断裂 MO 的氮氮双键，破坏苯环结构。MO 的降解过程符合准一级反应动力学模型；Fe/Mn/C 微电解体系对
–4
–1
–4
–1
MO 降解的反应速率常数由 Fe/C 微电解体系的 5.7381×10 min 提高至 9.3834×10 min ，降解速率和降解效
果显著优于 Fe/C 微电解体系。
关键词：Fe/Mn/C；微电解；染料废水；化学反应；降解；动力学；水处理技术
中图分类号：X523 文献标识码：A 文章编号：1003-5214 (2023) 01-0153-09

Mechanisms of Mn promoting Fe/C microelectrolysis
reaction rate and degrading pollutants

JIA Yanping, DING Xue, DU Fei, ZHANG Jian, ZHANG Haifeng, ZHANG Lanhe
（School of Chemical Engineering, Northeast Electric Power University, Jilin 132012, Jilin, China）

Abstract: To broaden the application range of Fe/C microelectrolysis process and improve the treatment
efficiency, Fe/Mn/C ternary microelectrolysis system with Mn adding into cast iron scraps and coconut
shell activated carbon was constructed for methyl orange (MO) degradation in simulated dye wastewater.
The morphology and elemental composition of Fe, Mn and activated carbon were analyzed by SEM-EDS,
FTIR and Raman spectra. The change of organic compounds in the wastewater pre- and post-treatment were
investigated using UV and EEM (three dimensional fluorescence spectrometer). The degradation
performance of Fe/Mn/C and Fe/C microelectrolysis systems on MO was compared. The mechanism and
kinetics of MO degradation by Fe/Mn/C ternary microelectrolysis system were also explored. The results
showed that, after the reaction, iron oxides, hydroxides and manganese oxides were discovered on the
surfaces of Fe, Mn and carbon fillers. Meanwhile, it was found that Fe/Mn/C ternary microelectrolysis
system broke the N==N double bond and damaged the benzene ring structure in MO. The degradation
process of MO conformed to quasi first-order kinetic model. The reaction rate constant of MO degradation
–4
–1
under the new ternary Fe/Mn/C microelectrolytic system was increased from 5.7381×10 min under Fe/C
–4
–1
microelectrolysis system to 9.3834×10 min , indicating highly improved degradation rate and effect
under Fe/Mn/C microelectrolytic system.
Key words: Fe/Mn/C; microelectrolysis; dye wastewater; chemical reaction; degradation; kinetics; water
treatment technology

染料废水含有大量的苯系、萘系、蒽醌及酚类 多等特点，是治理难度较大的工业废水 [1-4] ，亟需寻
有毒化合物，具有难生物降解、色度高、有毒物质 求经济有效的染料废水处理方法。

收稿日期：2022-05-17; 定用日期：2022-07-26; DOI: 10.13550/j.jxhg.20220467
基金项目：国家自然科学基金（52070035）；吉林省科技发展计划项目（20180201016SF）
作者简介：贾艳萍（1973—），女，博士，教授，E-mail：jiayanping1111@sina.com。