Catalytic Pulse Plasma Treatment for Organic Micro pollutants: Unveiling the Synergistic Role of Photocatalysts in Radical Generation and Degradation Mechanisms
{"title":"Catalytic Pulse Plasma Treatment for Organic Micro pollutants: Unveiling the Synergistic Role of Photocatalysts in Radical Generation and Degradation Mechanisms","authors":"Ritik Anand, Ligy Philip","doi":"10.1039/d4ew00167b","DOIUrl":null,"url":null,"abstract":"This work aims toward the remediation of multiple organic micropollutants simultaneously present in municipal wastewater. Catalytic pulsed plasma treatment (CPPT) coupled with TiO2 and N-TiO2 photocatalysts was employed to degrade naproxen (NPX), triclosan (TCS), and reactive red 180 (RR180). This study addressed a key challenge towards achieving Sustainable Development Goal (SDG) 6 for clean water and sanitation. The operating conditions were 23 kV at a pulse frequency of 33 Hz for a 50 mL sample volume. The synergy of photocatalysts with plasma was observed with N-TiO2 reducing the treatment time for complete degradation by 50% as compared to the non-catalytic system. This improvement was due to enhanced radical generation, catalyst activation by UV-visible light, and increased surface area. The enhancement in radical generation noted was ~85% for H2O2 and ~100% for •OH. The role of •SO4- in RR180 degradation was noted. The disc diffusion test showed no inhibition zone for NPX and TCS at 1 mg/L and RR180 at 10 mg/L within 8 min. The degradation yield increased by 25% compared to the non-catalytic system. Mineralization efficiency follows the order TCS > RR180 > NPX. Finally, CPPT demonstrates >99% degradation efficiency in the multipollutant system of real secondary treated wastewater, showcasing its broad applicability in diverse wastewater scenarios","PeriodicalId":75,"journal":{"name":"Environmental Science: Water Research & Technology","volume":null,"pages":null},"PeriodicalIF":3.5000,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Environmental Science: Water Research & Technology","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1039/d4ew00167b","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}
引用次数: 0
Abstract
This work aims toward the remediation of multiple organic micropollutants simultaneously present in municipal wastewater. Catalytic pulsed plasma treatment (CPPT) coupled with TiO2 and N-TiO2 photocatalysts was employed to degrade naproxen (NPX), triclosan (TCS), and reactive red 180 (RR180). This study addressed a key challenge towards achieving Sustainable Development Goal (SDG) 6 for clean water and sanitation. The operating conditions were 23 kV at a pulse frequency of 33 Hz for a 50 mL sample volume. The synergy of photocatalysts with plasma was observed with N-TiO2 reducing the treatment time for complete degradation by 50% as compared to the non-catalytic system. This improvement was due to enhanced radical generation, catalyst activation by UV-visible light, and increased surface area. The enhancement in radical generation noted was ~85% for H2O2 and ~100% for •OH. The role of •SO4- in RR180 degradation was noted. The disc diffusion test showed no inhibition zone for NPX and TCS at 1 mg/L and RR180 at 10 mg/L within 8 min. The degradation yield increased by 25% compared to the non-catalytic system. Mineralization efficiency follows the order TCS > RR180 > NPX. Finally, CPPT demonstrates >99% degradation efficiency in the multipollutant system of real secondary treated wastewater, showcasing its broad applicability in diverse wastewater scenarios
期刊介绍:
Environmental Science: Water Research & Technology seeks to showcase high quality research about fundamental science, innovative technologies, and management practices that promote sustainable water.