文献类型： 外文期刊
作者： Zhang, Wei 1 ; Han, Yuying 1 ; Yang, Feng 1 ; Guan, Lijun 2 ; Lu, Fuping 1 ; Mao, Shuhong 1 ; Tian, Kangming 1 ; Yao, Mingdong 3 ; Qin, Hui-Min 1 ;
作者机构： 1.Tianjin Univ Sci & Technol, Coll Biotechnol, Key Lab Ind Fermentat Microbiol,Tianjin Key Lab In, Minist Educ,Natl Engn Lab Ind Enzymes, Tianjin 300457, Peoples R China
2.Heilongjiang Acad Agr Sci, Inst Food Proc, Harbin, Peoples R China
3.Tianjin Univ, Sch Chem Engn & Technol, Key Lab Syst Bioengn, Minist Educ, Tianjin 300072, Peoples R China
关键词： Polyethylene terephthalate; Plastic degradation; PETase; MHETase; Synergistic effect
期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：12.2； 五年影响因子：11.9 ）
ISSN： 0304-3894
年卷期： 2024 年 477 卷
页码：
收录情况： SCI
摘要： The enzymatic degradation of plastic offers a green, sustainable strategy and scalable circular carbon route for solving polyester waste. Among the earlies discovered plastic-degrading enzymes are PET hydrolase (PETase) and MHET hydrolase (MHETase), which act synergistically. To promote the adsorption of enzymes on PET surfaces, increase their robustness, and enable directly depolymerization, we designed hydrophobin HFBI fusedPETase and MHETase. A customized self-assembled synergistic biocatalyst (MC@CaZn-MOF) was further developed to promote the two-step depolymerization process. The tailored catalysts showed better adhesion to the PET surface and desirable durability, retaining over 70% relative activity after incubation at pH 8.0 and 60 degrees C for 120 h. Importantly, MC@CaZn-MOF could directly decompose untreated AGf-PET to generate 9.5 mM TPA with weight loss over 90%. The successful implementation of a bifunctional customized catalyst makes the largescale biocatalytic degradation of PET feasible, contributing to polymer upcycling and environmental sustainability.
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