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

查看全文 作　　者：Hao [1]Jia;Min [1]Zhang;Yunxuan [2]Weng;Yao [1]Zhao;Chengtao [1]Li;Aqsa [1]Kanwal 高影响力作者 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高影响力机构 出　　处：《Journal of Environmental Sciences》索引2021年第33卷第5期,共9页高影响力期刊 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
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