在水和的一维流通柱中, 6:2 甲硫酸盐和微生物群体动态的生物转化
Peng-Fei Yan1, Sheng Dong1, Matthew J Woodcock2
1Department of Biological and Environmental Engineering, Cornell University, Ithaca, NY, United States.
Water research
|February 2, 2024
概括
这项研究表明,在现实的土壤柱条件下,和多醇基物质 (PFAS) 的生物转化速度比实验室测试慢. 较低的流速和流量中断加剧了PFAS的分解,影响了微生物群落.
科学领域:
- 环境化学环境化学
- 环境微生物学 环境微生物学
- 环境工程 环境工程
背景情况:
- 和多基基物质 (PFAS) 是持久的环境污染物.
- 大多数PFAS生物转化研究使用实验室规模的批量反应器,不反映现场条件.
- 了解PFAS在流动下的和多孔介质中的命运至关重要.
研究的目的:
- 在一个现实的流通式柱体系统中研究 6:2 甲硫酸盐 (6:2 FTS) 的生物转化.
- 评估孔水速度和流量中断对6:2 FTS生物转化的影响.
- 分析在和多孔介质中PFAS生物转化期间微生物群落的变化.
主要方法:
- 使用PFAS污染的土壤进行一维的水和流通柱实验.
- 在305天内监测6:2 FTS度和生物转化产品.
- 使用16S rRNA基因测序分析浮游生物和附属微生物社区组成.
主要成果:
- 6:2 FTS生物转化速度有限,较低的孔水速度 (2.4厘米/天) 将废水度降低21.7-26.1%.
- 流量中断 (2和7天) 增强了6:2 FTS生物转化.
- 柱子生物转化速率大约是微观宇宙中的3.5倍.
- 附着的微生物群落沿着流动路径移动,罗多科克斯减少,佩洛托马库勒姆增加,这表明它们在6:2 FTS降解中的作用.
结论:
- 与批量反应器相比,在现实的流通条件下,PFAS生物转化速度明显较慢.
- 实验设计,包括流动动力学和微生物社区结构,对于准确的PFAS命运评估至关重要.
- 对现场PFAS生物转化进行进一步的研究需要更紧密地模仿环境条件的系统.
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