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Characterisation and reactivity of iron species in the Fenton reaction

芬顿反应中铁物质的表征和反应性

基本信息

批准号：
146578476
负责人：
Professor Dr. Torsten Schmidt
金额：
--
依托单位：
Arbeitsgruppe Instrumentelle Analytische Chemie
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2010
资助国家：
德国
起止时间：
2009-12-31 至 2016-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/146578476?language=en
关键词：
Characterisation reactivity iron species Fenton

项目摘要

The Fenton reaction is the reaction of ferrous iron (Fe(II) with hydrogen peroxide (H2O2). Although this reaction is well known for a long time and even used in industrial wastewater treatment under suitable pH conditions, a detailed process understanding of the individual reaction steps is still missing. In the proposed follow-up project to the running project SCHM 2350/5-1 we therefore want to continue the mechanistic study of the Fenton reaction. Emphasis is on the analysis of the involved intermediates, the iron-peroxo-complexes, as well as of the postulated reactive species at circumneutral pH, (Fe(IV)). In our research focus are both lifetimes of the reactive species and reactivities with selected probe compounds. For the former a systematic variation of the concentration of hydrogen peroxide and in case of the Fe2+/H2O2-complex and Fe(IV) also of pH shall be performed. The probe compounds for the latter are As(III) and electron-rich aromatic rings. The Fenton reaction is heavily influenced by the presence of iron-complexing agents with regard to the observed rate constant and the formed products. Both shall be investigated as a function of ligand concentration and pH. After a focus on inorganic ligands in the first phase, we will now switch to organic ligands. The gained knowledge shall be exemplarily applied for the improvement of the degradation of Bisphenol S, an important industrial chemical, for which elimination by the Fenton process is already used in wastewater treatment.

芬顿反应是亚铁（Fe（II））与过氧化氢（H2 O2）的反应。尽管该反应早已为人们所熟知，甚至在合适的pH条件下用于工业废水处理，但仍然缺少对各个反应步骤的详细工艺理解。因此，在正在进行的项目SCHM 2350/5-1的拟议后续项目中，我们希望继续芬顿反应的机理研究。重点是分析所涉及的中间体，铁过氧络合物，以及假定的反应物种在circumneutral pH值，（Fe（IV））。在我们的研究重点都是反应物种的寿命和与选定的探针化合物的反应性。对于前者，应进行过氧化氢浓度的系统变化，如果是Fe 2 +/H2 O2-络合物和Fe（IV），还应进行pH值的系统变化。后者的探针化合物是As（III）和富电子芳环。铁络合剂的存在对芬顿反应的速率常数和生成产物有很大影响。两者都应作为配体浓度和pH值的函数进行研究。在第一阶段集中于无机配体之后，我们现在将切换到有机配体。所获得的知识将被示范性地应用于改善双酚S的降解，双酚S是一种重要的工业化学品，通过芬顿工艺消除双酚S已经用于废水处理。