Towards carbon neutrality:Sustainable recycling and upcycling strategies and mechanisms for polyethylene terephthalate via biotic/abiotic pathways  

作　　者：Jiaqi Yang Zhiling Li Qiongying Xu Wenzong Liu Shuhong Gao Peiwu Qin Zhenglin Chen Aijie Wang 

机构地区：[1]School of Civil&Environmental Engineering,Harbin Institute of Technology(Shenzhen),Shenzhen 518055,China [2]State Key Laboratory of Urban Water Resources and Environment,School of Environment,Harbin Institute of Technology,Harbin 150090,China [3]Institute of Biopharmaceutical and Health Engineering,Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,China [4]Tsinghua-Berkeley Shenzhen Institute,Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,China

出　　处：《Eco-Environment & Health》2024年第2期117-130,共14页生态环境与健康（英文）

基　　金：supported by China Postdoctoral Science Foundation(No.2023M730856);the Launch of Doctoral Basic Research Program in Shenzhen(No.RCBS20221008093129082);the NSFC program(No.22306048);the NSFC-JSPS Program(No.51961145202).

摘　　要：Polyethylene terephthalate(PET),one of the most ubiquitous engineering plastics,presents both environmental challenges and opportunities for carbon neutrality and a circular economy.This review comprehensively addressed the latest developments in biotic and abiotic approaches for PET recycling/upcycling.Biotically,microbial depolymerization of PET,along with the biosynthesis of reclaimed monomers[terephthalic acid(TPA),ethylene glycol(EG)]to value-added products,presents an alternative for managing PET waste and enables CO_(2)reduction.Abiotically,thermal treatments(i.e.,hydrolysis,glycolysis,methanolysis,etc.)and photo/electrocatalysis,enabled by catalysis advances,can depolymerize or convert PET/PET monomers in a more flexible,simple,fast,and controllable manner.Tandem abiotic/biotic catalysis offers great potential for PET upcycling to generate commodity chemicals and alternative materials,ideally at lower energy inputs,greenhouse gas emissions,and costs,compared to virgin polymer fabrication.Remarkably,over 25 types of upgraded PET products(e.g.,adipic acid,muconic acid,catechol,vanillin,and glycolic acid,etc.)have been identified,underscoring the potential of PET upcycling in diverse applications.Efforts can be made to develop chemo-catalytic depolymerization of PET,improve microbial depolymerization of PET(e.g.,hydrolysis efficiency,enzymatic activity,thermal and pH level stability,etc.),as well as identify new microorganisms or hydrolases capable of degrading PET through computational and machine learning algorithms.Consequently,this review provides a roadmap for advancing PET recycling and upcycling technologies,which hold the potential to shape the future of PET waste management and contribute to the preservation of our ecosystems.

关 键 词：PET depolymerization MONOMERS Recycling/upcycling BIOCATALYSIS Photo/electrocatalysis 

分 类 号：X321[环境科学与工程—环境工程]