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Screening and identification of a polyurethane-degrading bacterium G-11 and its plastic degradation characteristics / 生物工程学报
Chinese Journal of Biotechnology ; (12): 1963-1975, 2023.
Article in Zh | WPRIM | ID: wpr-981182
Responsible library: WPRO
ABSTRACT
Polyurethane (PUR) plastics is widely used because of its unique physical and chemical properties. However, unreasonable disposal of the vast amount of used PUR plastics has caused serious environmental pollution. The efficient degradation and utilization of used PUR plastics by means of microorganisms has become one of the current research hotspots, and efficient PUR degrading microbes are the key to the biological treatment of PUR plastics. In this study, an Impranil DLN-degrading bacteria G-11 was isolated from used PUR plastic samples collected from landfill, and its PUR-degrading characteristics were studied. Strain G-11 was identified as Amycolatopsis sp. through 16S rRNA gene sequence alignment. PUR degradation experiment showed that the weight loss rate of the commercial PUR plastics upon treatment of strain G-11 was 4.67%. Scanning electron microscope (SEM) showed that the surface structure of G-11-treated PUR plastics was destroyed with an eroded morphology. Contact angle and thermogravimetry analysis (TGA) showed that the hydrophilicity of PUR plastics increased along with decreased thermal stability upon treatment by strain G-11, which were consistent with the weight loss and morphological observation. These results indicated that strain G-11 isolated from landfill has potential application in biodegradation of waste PUR plastics.
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Full text: 1 Index: WPRIM Main subject: Plastics / Polyurethanes / Bacteria / Biodegradation, Environmental / RNA, Ribosomal, 16S Language: Zh Journal: Chinese Journal of Biotechnology Year: 2023 Type: Article
Full text: 1 Index: WPRIM Main subject: Plastics / Polyurethanes / Bacteria / Biodegradation, Environmental / RNA, Ribosomal, 16S Language: Zh Journal: Chinese Journal of Biotechnology Year: 2023 Type: Article