当聚乙烯四甲微塑料在热友生物气升级系统中遇到 perfluorooctane sulfonate:它们对甲基生成的影响
Xin Kong1, Junmei Chen2, Song Wang3
1College of Environmental Science and Engineering, Taiyuan University of Technology, Jinzhong 030600, PR China; Department of Environmental and Resource Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark.
Journal of hazardous materials
|February 1, 2024
概括
在废物流中共存的微塑料 (MPs) 和 perfluorooctane sulfonate (PFOS) 可以增强CO2的甲生产. 铁 (Fe0) 的添加可能会促进 PFOS 在甲基生成过程中的生物降解.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 微塑料 (MP) 和 perfluorooctane sulfonate (PFOS) 是在废物流中发现的持久污染物.
- 无氧消化是含有这些污染物的废物流的常见处理方法.
- 对于MPs和PFOS对甲原代谢的协同作用尚不清楚.
研究的目的:
- 研究聚乙烯二甲 (PET) MPs单独和与PFOS一起对热友生物气升级过程中二氧化碳转化为CH4的影响.
- 为了探索PFOS在PETMP和铁 (Fe0) 的存在下潜在的脱化.
- 了解PFOS暴露下甲生成途径和基因表达的变化.
主要方法:
- 热友生物气升级系统实验.
- 添加聚乙烯二甲酸盐 (PET) 微塑料 (MPs) 和 perfluorooctane sulfonate (PFOS) 的添加.
- 包括零价值铁 (Fe0) 来增强物种间电子转移.
主要成果:
- 单独或与PFOS一起的PETMP,提高了甲 (CH4) 百分比和CO2利用率.
- 添加Fe0与PETMP显示潜在的脱率为15.88 ± 1.53%.
- 暴露于PFOS (300μg/L) 改变了甲原生途径,引入了甲化菌 (16%的主导地位),并增加了CO2转化为CH4的基因.
结论:
- 聚乙烯MP和PFOS的共存不会抑制缩甲原体的活性.
- 在甲基生成过程中,PFOS可能会经历部分生物降解,特别是在Fe0调节的情况下.
- 这项研究提供了关于MP和PFOS在无氧消化和沼气升级过程中的命运的见解.
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