一个光催化-微生物合系统,用于同时去除有害藻类和增强脱:构造,性能和作用机制
Dongpeng Li1, Yifei Wang1, Xiang Qi2
1Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China.
Journal of hazardous materials
|August 11, 2023
概括
在碳纤维上使用TiO2 / C3N4的新光催化系统有效地去除有害藻类和Microcystin-LR. 这种方法显著增强了微生物脱,改善了水质,减少了有害藻类繁殖的频率.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 微生物学 微生物学
背景情况:
- 在全球范围内,有害藻类繁殖 (HABs) 正在增加,这是由于高酸盐水平的肥胖化所致.
- 光催化材料有望增强微生物脱,但存在局限性.
- 同时去除藻类和毒素,如Microcystin-LR对于水安全至关重要.
研究的目的:
- 开发一种新的光催化增强微生物脱系统.
- 为了研究有害藻类 (Microcystis aeruginosa) 和Microcystin-LR (MC-LR) 的同时去除.
- 评估系统在酸盐去除方面的效率及其对微生物群落的影响.
主要方法:
- 在柔性碳纤维上加载TiO2/C3N4异质连接.
- 建立一个光催化增强的微生物脱系统.
- 分析了Microcystis aeruginosa,MC-LR和酸盐的去除速度.
- 评估脱酶活性,电子运输系统活性和微生物群体结构.
主要成果:
- 实现了99.35%的微囊气球菌的去除和95.34%的MC-LR的去除.
- 与现有系统相比,提升了72.33%的酸盐去除能力.
- 增强了微生物脱酶和电子运输系统活动的3.54至3.86倍.
- 增加了关键的脱细菌 (蛋白质细菌,细菌类) 的相对丰富度,从50.72%增加到66.45%.
结论:
- 新的TiO2 / C3N4 / 碳纤维系统有效地去除有害藻类和MC-LR,同时促进微生物脱.
- 光生成的电子优化微生物社区结构,提高脱效率.
- 细胞外聚合物物质可能有助于光生成电子的持续作用,即使在黑暗中.
- 该系统为减少HAB爆发和相关的二次污染提供了一个有希望的解决方案.
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