C. Miranda, P. Santander, J. Matschullat, B. Daus, J. Yáñez, H. Mansilla
{"title":"Degradation of Organoarsenicals by Heterogeneous Photocatalysis using ZnO, TiO2 and UVA","authors":"C. Miranda, P. Santander, J. Matschullat, B. Daus, J. Yáñez, H. Mansilla","doi":"10.1515/jaots-2016-0211","DOIUrl":null,"url":null,"abstract":"Abstract The oxidation of phenylarsine oxide (PhAsO) and cacodylic acid (CA) by UV-A assisted heterogeneous photocatalysis using ZnO and TiO2 was studied. The influence of pH and catalyst load was assessed using multifactorial design. Both studied variables showed a significant effect on organoarsenical degradation. PhAsO was completely removed in 5 min at pH 6.3 using TiO2 as catalyst under optimum conditions. In contrast, the same removal extent was achieved at a wider pH range (pH 4 to 10), when ZnO was used. A 100% degradation was reached for CA at 60 min irradiation using ZnO and pH 9.3. In comparison, only 60 % CA degradation was achieved using TiO2 at pH 6.5. Regarding the by-product formation during photocatalysis, the main degradation products found for PhAsO were phenylarsonic acid (PhAs), phenol and inorganic arsenate. With CA, only methanol and inorganic arsenate were found as main reaction products.","PeriodicalId":14870,"journal":{"name":"Journal of Advanced Oxidation Technologies","volume":"13 1","pages":"276 - 283"},"PeriodicalIF":0.0000,"publicationDate":"2016-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"5","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Advanced Oxidation Technologies","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1515/jaots-2016-0211","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q","JCRName":"Chemistry","Score":null,"Total":0}
引用次数: 5
Abstract
Abstract The oxidation of phenylarsine oxide (PhAsO) and cacodylic acid (CA) by UV-A assisted heterogeneous photocatalysis using ZnO and TiO2 was studied. The influence of pH and catalyst load was assessed using multifactorial design. Both studied variables showed a significant effect on organoarsenical degradation. PhAsO was completely removed in 5 min at pH 6.3 using TiO2 as catalyst under optimum conditions. In contrast, the same removal extent was achieved at a wider pH range (pH 4 to 10), when ZnO was used. A 100% degradation was reached for CA at 60 min irradiation using ZnO and pH 9.3. In comparison, only 60 % CA degradation was achieved using TiO2 at pH 6.5. Regarding the by-product formation during photocatalysis, the main degradation products found for PhAsO were phenylarsonic acid (PhAs), phenol and inorganic arsenate. With CA, only methanol and inorganic arsenate were found as main reaction products.
期刊介绍：
The Journal of advanced oxidation technologies (AOTs) has been providing an international forum that accepts papers describing basic research and practical applications of these technologies. The Journal has been publishing articles in the form of critical reviews and research papers focused on the science and engineering of AOTs for water, air and soil treatment. Due to the enormous progress in the applications of various chemical and bio-oxidation and reduction processes, the scope of the Journal is now expanded to include submission in these areas so that high quality submission from industry would also be considered for publication. Specifically, the Journal is soliciting submission in the following areas (alphabetical order): -Advanced Oxidation Nanotechnologies -Bio-Oxidation and Reduction Processes -Catalytic Oxidation -Chemical Oxidation and Reduction Processes -Electrochemical Oxidation -Electrohydraulic Discharge, Cavitation & Sonolysis -Electron Beam & Gamma Irradiation -New Photocatalytic Materials and processes -Non-Thermal Plasma -Ozone-based AOTs -Photochemical Degradation Processes -Sub- and Supercritical Water Oxidation -TiO2 Photocatalytic Redox Processes -UV- and Solar Light-based AOTs -Water-Energy (and Food) Nexus of AOTs
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