{"title":"Industrial potential of electro-oxidation and peroxymonosulfate coupling for efficient organic degradation in acidic dye wastewater","authors":"Jun Ma, Jincheng Lu, Yong Liu, Zhiyong Fan","doi":"10.1016/j.psep.2024.12.106","DOIUrl":null,"url":null,"abstract":"Dye manufacturing wastewater contains high sulfuric acid and organic contaminants. Organic contaminants complicate treatment and hinder sulfuric acid recovery, causing environmental issues and resource waste. This study combines electro-oxidation with peroxymonosulfate (EO-PMS) to treat highly acidic (∼10 %) wastewater from Dispersed Violet 93 dye. Degradation was monitored in real time using a modified continuous-flow UV-Vis spectrophotometer. EO-PMS efficiently removes organic compounds, allowing the treated acidic liquid to be reused in dye production. At 16 mA/cm² current density and 10 mM PMS, complete degradation of 300 mL wastewater occurred within 6 minutes, achieving 86 % mineralization. Degradation follows zero-order kinetics, with mass transfer efficiency being a key factor. Experimental variables influencing degradation efficiency were also investigated. Free radical scavenging and electron paramagnetic resonance experiments identified ·OH as the main active species (83.6 %), with minor contributions from SO<ce:inf loc=\"post\">4</ce:inf><ce:sup loc=\"post\">·-</ce:sup> (1.45 %) and others. Experimental data were used to fit the relationships between current intensity, PMS concentration, degradation time, and wastewater disposal costs to assess the economic feasibility of EO-PMS. This study presents an efficient, cost-effective degradation method with real-time monitoring, suitable for industrial-scale treatment and reuse of acidic dye wastewater.","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"20 1","pages":""},"PeriodicalIF":7.8000,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Process Safety and Environmental Protection","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1016/j.psep.2024.12.106","RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Dye manufacturing wastewater contains high sulfuric acid and organic contaminants. Organic contaminants complicate treatment and hinder sulfuric acid recovery, causing environmental issues and resource waste. This study combines electro-oxidation with peroxymonosulfate (EO-PMS) to treat highly acidic (∼10 %) wastewater from Dispersed Violet 93 dye. Degradation was monitored in real time using a modified continuous-flow UV-Vis spectrophotometer. EO-PMS efficiently removes organic compounds, allowing the treated acidic liquid to be reused in dye production. At 16 mA/cm² current density and 10 mM PMS, complete degradation of 300 mL wastewater occurred within 6 minutes, achieving 86 % mineralization. Degradation follows zero-order kinetics, with mass transfer efficiency being a key factor. Experimental variables influencing degradation efficiency were also investigated. Free radical scavenging and electron paramagnetic resonance experiments identified ·OH as the main active species (83.6 %), with minor contributions from SO4·- (1.45 %) and others. Experimental data were used to fit the relationships between current intensity, PMS concentration, degradation time, and wastewater disposal costs to assess the economic feasibility of EO-PMS. This study presents an efficient, cost-effective degradation method with real-time monitoring, suitable for industrial-scale treatment and reuse of acidic dye wastewater.
期刊介绍：
The Process Safety and Environmental Protection (PSEP) journal is a leading international publication that focuses on the publication of high-quality, original research papers in the field of engineering, specifically those related to the safety of industrial processes and environmental protection. The journal encourages submissions that present new developments in safety and environmental aspects, particularly those that show how research findings can be applied in process engineering design and practice.
PSEP is particularly interested in research that brings fresh perspectives to established engineering principles, identifies unsolved problems, or suggests directions for future research. The journal also values contributions that push the boundaries of traditional engineering and welcomes multidisciplinary papers.
PSEP's articles are abstracted and indexed by a range of databases and services, which helps to ensure that the journal's research is accessible and recognized in the academic and professional communities. These databases include ANTE, Chemical Abstracts, Chemical Hazards in Industry, Current Contents, Elsevier Engineering Information database, Pascal Francis, Web of Science, Scopus, Engineering Information Database EnCompass LIT (Elsevier), and INSPEC. This wide coverage facilitates the dissemination of the journal's content to a global audience interested in process safety and environmental engineering.
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