表面微观结构驱动生物膜的形成和石墨烯氧化物膜的生物污染在实际水处理中
Long Tian1,2, Peng Zhou1,2, Zhaoyang Su1
1State Key Laboratory of Environmental Aquatic Chemistry, Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, People's Republic of China.
Environmental science & technology
|June 28, 2024
概括
石墨烯氧化物 (GO) 膜显示出对净化水的前景. 一个光滑的,的Fe (OH) 3/GO膜通过促进有益的细菌减少了生物污染,与纹的GO膜不同.
科学领域:
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
- 生物技术是生物技术.
背景情况:
- 氧化石墨烯 (GO) 膜是用于净化水的先进材料.
- GO膜的生物污染是一个重大挑战,阻碍了长期的性能.
- 了解不同GO表面微观结构上的生物膜形成至关重要.
研究的目的:
- 研究具有不同表面微观结构的GO膜上的生物膜形成和生物.
- 在长时间 (110天) 的时间内,在自然地表水过过程中评估膜性能.
- 与微生物社区结构和代谢功能相关联的表面特性.
主要方法:
- 制造具有明显表面地形 (光滑或纹) 的GO膜.
- 使用自然地表水进行过试验.
- 生物膜分析,包括微生物群落分析和细胞外聚合物质 (EPS) 评估.
- 长期的流量监测.
主要成果:
- 水友和光滑的Fe ((OH) 3 / GO膜呈现出薄而异质的生物膜,并保持了高而稳定的水流.
- 薄弱的水友和纹的Fe/GO和H-Fe(OH) 3/GO膜显示生物膜的形成增加和生物污染加剧.
- 表面的水友性和粗性影响了细菌群体的组成和代谢活动.
- 水友表面有利于有机物降解和掠食性细菌,有助于EPS降解和生物膜异质性.
- 纹表面减少了微生物多样性,并促进了分泌EPS的细菌,导致严重的生物污染.
结论:
- 表面微观结构显著影响GO膜生物污染行为.
- 优化GO膜表面特性 (水友性,光滑性) 可以减轻生物污染.
- 定制表面特征可以指导微生物社区功能,以提高膜性能.
- 尽管存在生物污染的挑战,但GO膜显示出可持续净水的潜力.
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