Reductive Mechanisms in Manganese-Catalyzed Fenton-Like Reactions: Pollution Prevention and Source Control Applications

0001354瓦这项研究的目的是了解氧化锰催化的类芬顿反应的机理和发生这些反应的条件。初步结果表明，氧化锰催化剂可产生低至0.0006 M(20 mg/L)过氧化氢的还原剂，比铁催化体系所需浓度低1000倍，潜在地为工业产生和污染场所存在的有机污染物的强化解吸和转化提供了一种更化学计量比更有效和更经济的体系。这项研究的具体目标包括调查在锰氧化物催化的Fenton-like反应中促进还原剂生成的工艺条件；识别还原物质；调查污染物转化途径和矿化潜力；以及评估土壤催化的过氧化氢分解产生的瞬时氧物种及其从土壤和污泥中解吸污染物的能力。这项研究的结果预计将为从淤泥和土壤中置换和处理工业污染物提供更有效和更经济的工艺，通过减少工艺水和淤泥的体积和清理受污染地点的污染源区域来促进有效的污染预防。

0001354 Watts The objective of this research is to understand the mechanisms of manganese oxide-catalyzed Fenton-like reactions and the conditions under which these reactions occur. Preliminary results have shown that manganese oxide catalysts may produce reductants with as low as 0.0006 M (20 mg/L) hydrogen peroxide, one thousand times less than the concentration required in iron-catalyzed systems, potentially providing a more stoichiometrically efficient and economical system for the enhanced desorption and transformation of organic contaminants generated by industry and present at contaminated sites. Specific objectives of the research include investigating process conditions that promote the generation of reductants in manganese oxide-catalyzed Fenton-like reactions; identifying the reductant species; investigating contaminant transformation pathways and potential for mineralization; and evaluating the generation of transient oxygen species from soil-catalyzed decomposition of hydrogen peroxide and their ability to desorb contaminants from soils and sludges. The results of this research are expected to provide more effective and economical processes for the displacement and treatment of industrial contaminants from sludges and soils, promoting effective pollution prevention through volume reduction of process water and sludges and cleanup of source areas at contaminated sites.***