Sun Wenxiao, Zhang Yizhi, Zhang Hong, Wu Hui, Liu Qiang, Yang Fan, Hou MengZong, Qi Yanjiao, Zhang Wenbo
Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission, Key Laboratory for Utility of Environment-Friendly Composite Materials and Biomass in University of Gansu Province, College of Chemical Engineering, Northwest Minzu University, Lanzhou, Gansu 730030, China; Gansu Provincial Biomass Function Composites Engineering Research Center, Lanzhou, Gansu 730030, China.
Department of Orthopedics, Lanzhou University Second Hospital, Lanzhou, Gansu 730000, China.
Sci Total Environ. 2024 Jan 10;907:167708. doi: 10.1016/j.scitotenv.2023.167708. Epub 2023 Oct 17.
The escalating problem of environmental ecological pollution caused by plastics presents a significant challenge, which makes the management of plastic waste urgent nowadays. In this study, a bacterium named WX-2 was isolated and screened for its potential in polymer degradation. Through standard microbiological techniques and 16SrDNA gene sequencing, it was identified as Enterobacter hormaechei. To assess its biodegradability potential, various plastics including High density polyethylene, Polypropylene, Linear low density polyethylene, Poly (butyleneadipate-co-terephthalate) and Polyvinyl chloride were subjected to the study. The biodegradability of the plastics was evaluated using multiphase approaches involving techniques such as Scanning electron microscopy, Fourier transform infrared spectroscopy, Mass loss, X-ray diffraction, X-ray photoelectron spectroscopy, Water contact angle, and Gas chromatography-mass spectrometry. Results indicated that WX-2 possesses the capability to utilize diverse plastic polymers as sole carbon sources, displaying distinct biodegradation capacities. Notably, PBAT exhibited heightened susceptibility to degradation by the screened bacterial population.
塑料造成的环境生态污染问题日益严重，这带来了巨大挑战，使得如今塑料垃圾的管理变得紧迫。在本研究中，分离并筛选出一种名为WX - 2的细菌，以评估其在聚合物降解方面的潜力。通过标准微生物技术和16SrDNA基因测序，它被鉴定为霍氏肠杆菌。为评估其生物降解潜力，对包括高密度聚乙烯、聚丙烯、线性低密度聚乙烯、聚（己二酸丁二醇酯 - 对苯二甲酸酯）和聚氯乙烯在内的各种塑料进行了研究。使用多相方法评估塑料的生物降解性，这些方法涉及扫描电子显微镜、傅里叶变换红外光谱、质量损失、X射线衍射、X射线光电子能谱、水接触角和气相色谱 - 质谱等技术。结果表明，WX - 2有能力将多种塑料聚合物作为唯一碳源利用，展现出不同的生物降解能力。值得注意的是，聚（己二酸丁二醇酯 - 对苯二甲酸酯）对筛选出的细菌群体表现出更高的降解敏感性。
