{"title":"Oxidative degradation of phenol in aqueous solution by using heat, ZVI, AC, heat/ZVI, or heat/AC activated persulfate","authors":"","doi":"10.56042/ijct.v30i6.6544","DOIUrl":null,"url":null,"abstract":"Degradation of phenol by heat-activated, ZVI-activated, AC-activated, heat/AC-activated, and heat/ZVI-activated persulfate have been investigated. As a result, the degradation of phenol fitted well with pseudo-first order kinetic model. For the solution with phenol concentration of 100 mg/L, degradation efficiency of nearly 100% and reaction rate constant of 0.0506 min -1 are realized by heat-activated persulfate when reaction temperature is 70℃, concentration of persulfate is 15 g/L, reaction time is 120 min under neutral pH. Besides, the highest degradation efficiency and reaction rate constant of phenol by ZVI-activated are respectively, 92.85% and 0.0198 min -1 when concentration of ZVI is 5 g/L, concentration of persulfate was 15 g/L, and reaction time is 120 min under neutral pH. Furthermore, the highest degradation efficiency and reaction rate constant of phenol by AC-activated persulfate are 99.1% and 0.0373 min -1 , respectively with persulfate concentration of 5 g/L and AC concentration of 5 g/L under neutral pH in 120 min. Moreover, the heat/AC-activated and heat/ZVI-activated persulfate are showing obvious synergistic effect during degradation process of phenol, and the reaction rate constants of heat/AC-activated and heat/ZVI-activated persulfate are respectively, 0.0512 and 0.0561 min -1 . The radical scavenger experiments proved that both SO 4-• and OH• are significant radicals in degradation of phenol by ZVI-activated and AC-activated persulfate, and SO 4-• are predominant radicals in degradation of phenol.","PeriodicalId":13388,"journal":{"name":"Indian Journal of Chemical Technology","volume":"11 1","pages":"0"},"PeriodicalIF":0.5000,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Indian Journal of Chemical Technology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.56042/ijct.v30i6.6544","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}
引用次数: 0
Abstract
Degradation of phenol by heat-activated, ZVI-activated, AC-activated, heat/AC-activated, and heat/ZVI-activated persulfate have been investigated. As a result, the degradation of phenol fitted well with pseudo-first order kinetic model. For the solution with phenol concentration of 100 mg/L, degradation efficiency of nearly 100% and reaction rate constant of 0.0506 min -1 are realized by heat-activated persulfate when reaction temperature is 70℃, concentration of persulfate is 15 g/L, reaction time is 120 min under neutral pH. Besides, the highest degradation efficiency and reaction rate constant of phenol by ZVI-activated are respectively, 92.85% and 0.0198 min -1 when concentration of ZVI is 5 g/L, concentration of persulfate was 15 g/L, and reaction time is 120 min under neutral pH. Furthermore, the highest degradation efficiency and reaction rate constant of phenol by AC-activated persulfate are 99.1% and 0.0373 min -1 , respectively with persulfate concentration of 5 g/L and AC concentration of 5 g/L under neutral pH in 120 min. Moreover, the heat/AC-activated and heat/ZVI-activated persulfate are showing obvious synergistic effect during degradation process of phenol, and the reaction rate constants of heat/AC-activated and heat/ZVI-activated persulfate are respectively, 0.0512 and 0.0561 min -1 . The radical scavenger experiments proved that both SO 4-• and OH• are significant radicals in degradation of phenol by ZVI-activated and AC-activated persulfate, and SO 4-• are predominant radicals in degradation of phenol.
期刊介绍:
Indian Journal of Chemical Technology has established itself as the leading journal in the exciting field of chemical engineering and technology. It is intended for rapid communication of knowledge and experience to engineers and scientists working in the area of research development or practical application of chemical technology. This bimonthly journal includes novel and original research findings as well as reviews in the areas related to – Chemical Engineering, Catalysis, Leather Processing, Polymerization, Membrane Separation, Pharmaceuticals and Drugs, Agrochemicals, Reaction Engineering, Biochemical Engineering, Petroleum Technology, Corrosion & Metallurgy and Applied Chemistry.