期刊
BIOCHEMICAL ENGINEERING JOURNAL
卷 93, 期 -, 页码 222-228出版社
ELSEVIER
DOI: 10.1016/j.bej.2014.10.012
关键词
Polyethylene terephthalate (PET) nanoparticles; Product inhibition; Plastic recycling; Heterogeneous biocatalysis; Kinetic parameters; Enzyme activity
资金
- Deutsche Bundesstiftung Umwelt [AZ 20012/202]
The biocatalytic hydrolysis of post-consumer polyethylene terephthalate (PET) is a promising approach for an environmentally friendly plastic recycling process. The influence of intermediate hydrolysis products on the degradation of PET by TfCut2, a polyester hydrolase from Thermobifida fusca, was analyzed by reversed-phase HPLC. Nanoparticles prepared from PET films as substrate were hydrolyzed by the enzyme in the presence of ethylene glycol, terephthalic acid, bis(2-hydroxyethyl) terephthalate (BHET) and mono-(2-hydroxyethyl) terephthalate (MHET). The initial reaction rates were determined and kinetically analyzed using a model for PET degradation. BHET and MHET were identified as competitive inhibitors with similar binding constants. The reaction efficiency (E-f) for the hydrolysis of MHET was considerably lower compared to BHET indicating MHET as a relevant inhibitor of the enzymatic hydrolysis of PET nanoparticles by TfCut2. The results demonstrate the importance of product inhibition of the hydrolysis of PET by TfCut2 for the further improvement of biocatalytic plastic recycling processes. (C) 2014 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据