适应时间对河岸过中林氏素去除的影响:长期沙柱研究
Jian Zhao1, Yangrui Huang1, Shengchao Hu1
1Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China.
Journal of hazardous materials
|December 28, 2024
概括
河岸过通过生物降解有效地去除有机微污染物 (OMP),随着时间的推移,去除效率会提高. 通过林氏素增强的特定微生物群落驱动这些OMP降解过程.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 水处理 处理水的方法
背景情况:
- 河岸过 (RBF) 是一种主要的饮用水预处理方法,依靠生物降解去除有机微污染物 (OMP).
- 了解在RBF系统中改进OMP删除的机制以及更长的适应时间的机制至关重要,但仍然不太了解.
研究的目的:
- 在模拟的RBF系统中,评估了82天内128个OMP的移除情况.
- 为了识别有改进的删除和分析其属性的OMP.
- 调查微生物群落的转移及其在OMP生物降解中的作用,特别是在接触林氏素后.
主要方法:
- 模拟的河岸过系统运行了82天,以监测OMP的去除.
- 分析了128个OMP,重点关注那些随着时间的推移而增强的去除.
- 在林氏素暴露400天后,微生物群体分析 (包括基因丰度).
主要成果:
- 在82天内,包括林氏素和可纳在内的24种OMP的清除效率提高了3-77%.
- 林氏素的去除率在68天内从20%增加到95%,与三级胺基和二级硫胺基相关.
- 林氏素暴露显著增加了特定的抗生素耐药细菌 (例如,Thiobacillus) 和氨氧化古生物 (例如,Nitrososphaera).
结论:
- 在RBF系统中的生物降解机制在长时间内增强了OMP的去除.
- 特定的微生物群落,潜在地庇护抗药性基因,在降解像林氏素这样的OMP中发挥着至关重要的作用.
- 了解这些微生物动态是优化RBF以获得有效的饮用水处理的关键.
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