Xiaoyong Xu, Yang Li, Phong Vo, Pradeep Shukla, Lei Ge, Chunxia Zhao
{"title":"Electrochemical advanced oxidation of per- and polyfluoroalkyl substances (PFASs): Development, challenges and perspectives","authors":"Xiaoyong Xu, Yang Li, Phong Vo, Pradeep Shukla, Lei Ge, Chunxia Zhao","doi":"10.1016/j.cej.2024.157222","DOIUrl":null,"url":null,"abstract":"Perfluoroalkyl and polyfluoroalkyl substances (PFAS) have been globally distributed since 1940, resulting in their widespread existence in natural environments. This is due to the remarkable stability of carbon–fluorine bonds, which are difficult to degrade chemically in a natural setting. PFASs accumulate in the human body through daily consumption of water and food, which can lead to potential health effects such as immune, metabolic, and neurodevelopmental effects. As a result, there is a growing global concern regarding PFAS remediation, given their toxicity and bio-accumulative properties in recent years. Electrochemical advanced oxidation processes (EAOPs) have been developed for the remediation of PFASs and have been applied in wastewater treatment. In these processes, a highly powerful oxidizing agent, hydroxyl radical ((<img alt=\"radical dot\" src=\"https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/rad.gif\" style=\"vertical-align:middle\"/>)OH), is generated electrochemically in solution, which can oxidize organic contaminants. EAOPs have become an environmentally friendly and effective treatment process for destroying PFASs. However, their slow reaction rate, poor performance stability, high energy consumption, and electrode erosion hinder their commercialization for water treatment. This paper provides a comprehensive overview of state-of-the-art anode materials and their corresponding degradation efficiency of PFASs through electrochemical remediation, along with future recommendations. A worldwide perspective on the fundamentals and experimental setups is provided, examining, and discussing different anode electrodes, as well as the challenges of EAOPs for PFAS remediation.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":null,"pages":null},"PeriodicalIF":13.3000,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chemical Engineering Journal","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1016/j.cej.2024.157222","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Perfluoroalkyl and polyfluoroalkyl substances (PFAS) have been globally distributed since 1940, resulting in their widespread existence in natural environments. This is due to the remarkable stability of carbon–fluorine bonds, which are difficult to degrade chemically in a natural setting. PFASs accumulate in the human body through daily consumption of water and food, which can lead to potential health effects such as immune, metabolic, and neurodevelopmental effects. As a result, there is a growing global concern regarding PFAS remediation, given their toxicity and bio-accumulative properties in recent years. Electrochemical advanced oxidation processes (EAOPs) have been developed for the remediation of PFASs and have been applied in wastewater treatment. In these processes, a highly powerful oxidizing agent, hydroxyl radical (()OH), is generated electrochemically in solution, which can oxidize organic contaminants. EAOPs have become an environmentally friendly and effective treatment process for destroying PFASs. However, their slow reaction rate, poor performance stability, high energy consumption, and electrode erosion hinder their commercialization for water treatment. This paper provides a comprehensive overview of state-of-the-art anode materials and their corresponding degradation efficiency of PFASs through electrochemical remediation, along with future recommendations. A worldwide perspective on the fundamentals and experimental setups is provided, examining, and discussing different anode electrodes, as well as the challenges of EAOPs for PFAS remediation.
期刊介绍:
The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.