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

这项研究的目的是了解氧化锰催化的类芬顿反应的机理以及这些反应发生的条件。初步结果表明，锰氧化物催化剂可以产生低至0.0006 M （20 mg/L）过氧化氢的还原剂，比铁催化系统所需的浓度低1000倍，有可能为工业产生的有机污染物的增强解吸和转化提供一个化学计量效率更高、更经济的系统。该研究的具体目标包括研究促进氧化锰催化芬顿样反应中还原剂生成的工艺条件；确定还原剂种类；研究污染物转化途径和矿化潜力；评估土壤催化过氧化氢分解产生的瞬态氧及其从土壤和污泥中解吸污染物的能力。这项研究的结果有望为污泥和土壤中的工业污染物的置换和处理提供更有效和经济的方法，通过减少工艺水和污泥的体积以及清理污染场地的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.***