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一种新的细菌组合,有效降解聚烯微塑料

Peng Xiang¹, Yunfeng Zhang¹, Ting Zhang²

¹Key Laboratory of Coarse Cereal Processing, Ministry of Agriculture and Rural Affairs, Sichuan Engineering & Technology Research Center of Coarse Cereal Industrialization, School of Food and Biological Engineering, Chengdu University, Chengdu, Sichuan, China.

Journal of hazardous materials

|June 18, 2023

概括

三种细菌菌株Stenotrophomonas maltophilia和Bacillus velezensis显示出显著的聚钢 (PS) 微塑料降解. 这种结合的细菌处理为微塑料的生物降解提供了一个有希望的方法.

科学领域:

环境微生物学环境微生物学
聚合物科学聚合物科学
生物技术是生物技术.

背景情况:

聚钢 (PS) 微塑料对环境构成重大挑战.
微生物降解为塑料废物提供了潜在的可持续解决方案.
了解细菌联盟对PS降解的影响至关重要.

研究的目的:

通过三种细菌培养来研究聚乙烯微塑料的联合分解:Stenotrophomonas maltophilia,Bacillus velezensis和Acinetobacter辐射抵抗.
评估单个和组合的细菌处理对PS微塑料生物降解的有效性.
用各种分析技术确认生物降解.

主要方法:

培养的Stenotrophomonas maltophilia,Bacillus velezensis和Acinetobacter在PS微塑料上具有放射性抵抗力,作为唯一的碳来源.
化60天以评估体重减轻和半衰期.
通过扫描电子显微镜,水接触角度,高温凝染色学,里埃变换红外光谱学和热重力测量分析确认生物降解.

主要成果:

斯坦诺特罗福蒙纳斯马尔托菲利亚和Bacillus velezensis获得的最大PS微塑料减肥率为43.5% (半衰期为74.9天).
Acinetobacter的放射电阻显示最大的体重减轻为16.7% (半衰期为251.1天).
这三种菌株的组合导致了17.0%的体重减轻 (半衰期为224.2天),具有影响降解效率的跨物种相互作用.

结论:

斯坦诺托福蒙纳斯 (Stenotrophomonas maltophilia) 和百日菌 (Bacillus velezensis) 显示出优越的PS微塑料降解能力,可能是由于协同相互作用.
这项研究提供了第一个证据,证明了PS微塑料上的细菌组合的差异性降解.
这些发现为开发聚乙烯废物的混合细菌生物降解技术提供了宝贵的参考.

关键词:

生物降解生物降解环境保护环境保护微塑料是一种微塑料.控制污染的方法控制污染的方法聚乙烯是一种聚乙烯.

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