使用细菌生物膜生物吸收亚微米尺寸的聚烯微塑料
Bogyeong Kim1, Seung-Woo Lee2, Eui-Man Jung3
1Department of Microbiology, Pusan National University, 2 Busandaehak-ro 63 beon-gil, Geumjeong-gu, Busan, Republic of Korea.
Journal of hazardous materials
|June 25, 2023
概括
细菌生物膜有效地从水中去除微塑料. 这种细菌是Acinetobacter sp. 生物膜显示出聚烯微塑料的高生物吸收能力,为水处理提供了一个有希望的环保解决方案.
科学领域:
- 环境微生物学 环境微生物学
- 环境化学环境化学
- 材料科学 材料科学 材料科学
背景情况:
- 微塑料带来了重大的生态和毒理风险.
- 从水生环境中有效地去除微塑料至关重要.
- 细菌生物膜被探索为微塑料整治的可持续解决方案.
研究的目的:
- 评估细菌生物膜在生物吸收性去除亚微米尺寸的聚乙烯 (PS) 微塑料中的有效性.
- 为了比较不同细菌生物膜 (Pseudomonas aeruginosa,Bacillus subtilis,Acinetobacter sp.) 的性能. 用于微塑料的去除.
- 研究吸附动力学,异热模型和影响微塑料生物吸收的环境因素.
主要方法:
- 使用三种不同的菌株形成细菌生物膜.
- 批量实验以测试微塑料去除效率.
- 使用富里埃变换红外光谱法 (FTIR) 进行分析,以了解生物吸收机制.
- 研究环境参数 (温度,pH,共存的离子) 和化前效应.
主要成果:
- 这种细菌是Acinetobacter sp. 与其他菌株相比,生物膜在430nmPS微塑料中表现出优越的去除性能.
- 由Acinetobacter sp.获得的715.5 mg/g的高去除能力是Acinetobacter sp.获得的. 在20分钟内产生生物膜.
- 生物吸收遵循伪二次动力学和弗洛伊德利希等温模型,表明化学吸收.
- 环境因素的影响最小,但在淡水中进行预化减少了生物吸收能力.
结论:
- 这种细菌是Acinetobacter sp. 生物膜在生物吸收性去除亚微米PS微塑料方面非常有效.
- 化学吸收是生物膜吸收微塑料的主要机制.
- 细菌生物膜为减轻水系统中微塑料污染提供了一种可行的生物方法.
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