Degradation of poly(butylene adipate-co-terephthalate) by Stenotrophomonas sp. YCJ1 isolated from farmland soil  

作　　者：Hao Jia Min Zhang Yunxuan Weng Yao Zhao Chengtao Li Aqsa Kanwal 

机构地区：[1]School of Environmental Science and Engineering,Shaanxi University of Science and Technology,Xi'an 170021,China [2]Beijing Key Laboratory of Plastics Health and Safety Quality Evaluation Technology,Beijing Technology and Business University,Beijing 100048,China

出　　处：《Journal of Environmental Sciences》2021年第5期50-58,共9页环境科学学报（英文版）

基　　金：supported by the Research Fund at the Shaanxi Provincial Science and Technology Department of China (No. 2018SF-375);Beijing Key Laboratory of Plastics Health and Safety Quality Evaluation Technology, Beijing Technology and Business University (No. TQETJP2018 004)。

摘　　要：In recent years, poly(butylene adipate-co-terephthalate)(PBAT) has been widely used. However, PBAT-degrading bacteria have rarely been reported. PBAT-degrading bacteria were isolated from farmland soil and identified. The effects of growth factors on the degradation of PBAT and the lipase activity of PBAT-degrading bacteria were assessed. The degradation mechanism was analyzed using scanning electron microscopy, attenuated total reflection Fourier transform infrared spectroscopy, proton nuclear magnetic resonance, Xray diffraction, and liquid chromatography-mass spectrometry. The results showed that Stenotrophomonas sp. YCJ1 had a significant degrading effect on PBAT. Under certain conditions, the strain could secrete 10.53 U/m L of lipase activity and degrade 10.14 wt.% of PBAT films. The strain secreted lipase to catalyze the degradation of the ester bonds in PBAT, resulting in the production of degradation products such as terephthalic acid, 1,4-butanediol, and adipic acid. Furthermore, the degradation products could participate in the metabolism of YCJ1 as carbon sources to facilitate complete degradation of PBAT, indicating that the strain has potential value for the bioremediation of PBAT in the environment.

关 键 词：Biodegradable Poly(butylene adipate-co-terephthalate)(PBAT) Stenotrophomonas sp. Lipase Degradation mechanism 

分 类 号：X172[环境科学与工程—环境科学]