Topic
Oxalic acid
About: Oxalic acid is a research topic. Over the lifetime, 11584 publications have been published within this topic receiving 173263 citations. The topic is also known as: ethanedioic acid & H2ox.
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70 citations
TL;DR: A series of CuO/ZnO/Al2O3 catalysts were prepared via a direct combustion of Cu nitrate, Zn and Al acetate with citric acid, oxalic acid or urea as fuel.
70 citations
TL;DR: In this article, a cycle catalytic mechanism of manganese ion (Mn2+) and oxalic acid was proposed to accelerate the degradation of 2,4-dinitrotoluene (DNT).
Abstract: Manganese catalytic ozonation of 2,4-dinitrotoluene (DNT) in the presence of oxalic acid was studied. The addition of manganese ion (Mn2+) or oxalic acid alone in ozonation process did not enhance DNT degradation, but the addition of Mn2+ coupled with oxalic acid accelerated degradation of DNT. The DNT degradation efficiency was influenced by carbonate in the catalytic ozonation process. Kinetics study showed that Mn2+ catalytic ozonation significantly promoted the decomposition of ozone. Experimental results of electron spin resonance (ESR) demonstrated that addition of Mn2+ and oxalic acid produced much hydroxyl radicals in catalytic ozonation system than that in single ozonation system. These results suggested that catalytic ozonation followed hydroxyl radical-type mechanism. Mn2+ promoted decomposition of ozone to produce hydroxyl radical and it was oxidized into manganese oxide. Manganese oxide was reduced into Mn2+ by oxalic acid, which is the key step of catalytic process. Based on above results, a cycle catalytic mechanism of Mn2+ was proposed. Intermediates were determined by HPLC and CC-MS, and they mainly included aromatic organics and aliphatic carboxylic acids. (C) 2008 Elsevier B.V. All rights reserved.
70 citations
TL;DR: The transient products formed during mineralization of 2,4-D by Fe 3+ -catalyzed hydrogen peroxide in the dark or under 350-nm UV were identified in connection with studies of these advanced oxidation processes for wastewater treatment as discussed by the authors.
Abstract: The transient products formed during mineralization of 2,4-D by Fe 3+ -catalyzed hydrogen peroxide in the dark or under 350-nm UV were identified in connection with studies of these advanced oxidation processes for wastewater treatment. Ethyl acetate extracts revealed 2,4-dichlorophenol as the major product (≤15% yield) and ≤3% each of 2,4-dichlorophenyl formate, 2,4-dichloro-1-(chloromethoxy)-benzene, and 6,8-dichloro-2H-1,4-benzodioxan-3-one. The aqueous phase contained oxalic acid in dark reactions and oxalic and formic acids in photoassisted reactions, identified as their 1-propanol esters
70 citations
TL;DR: In this article, the effect of oxalic acid and pH on iron reduction by a biomimetic fungal chelator and on the adsorption/desorption of iron to/from wood was investigated.
70 citations