Photocatalytic Oxidation of Oxalic Acid with Oxygen and Ozone in an Aqueous Solution

{"title":"Photocatalytic Oxidation of Oxalic Acid with Oxygen and Ozone in an Aqueous Solution","authors":"A. V. Levanov,&nbsp;A. V. Lapina,&nbsp;O. Ya. Isaikina","doi":"10.1134/S0036024424702716","DOIUrl":null,"url":null,"abstract":"<p><b>Abstract</b>—An experimental study has been carried out on the mineralization of oxalic acid H₂C₂O₄ and other oxidation-resistant organic compounds in aqueous solutions under the influence of oxygen, ozone, and ultraviolet radiation. It was found that in acidic solutions H₂C₂O₄ does not oxidize under the influence of ozone or UV irradiation in the presence of oxygen; when exposed simultaneously to O₃ + UV it has a low rate of oxidation. The possibility of photocatalysis of the mineralization process by Mn²⁺, MnO<span>\\(_{4}^{ - }\\)</span>, Fe³⁺, Co²⁺, BrO<span>\\(_{3}^{ - }\\)</span>, or IO<span>\\(_{3}^{ - }\\)</span> ions was studied The most effective photocatalysts are Fe³⁺ ions: in their presence and under UV irradiation, a fairly rapid oxidation of oxalic acid to CO₂ occurs, as under the influence of O₃ and O₂. The conditions for maximum ozone conversion during photomineralization of oxalic acid have been found. The possibility of oxidative destruction of a more oxidation-resistant substrate, acetic acid, is shown during ozonation and UV irradiation of solutions with Fe(III) and H₂C₂O₄ additives.</p>","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"99 1","pages":"111 - 119"},"PeriodicalIF":0.7000,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Russian Journal of Physical Chemistry A","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1134/S0036024424702716","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}