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在密切合的TiO2光催化和生物降解系统中,细胞外聚合物质的光化学行为

Xiangwei Ding¹, Qingmiao Yu², Hongpu Xue³

¹State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China.

Bioresource technology

|November 8, 2024

概括

细胞外聚合物物质 (EPS) 的光敏化显著增强了密切结合的光催化和生物降解 (ICPB) 中的污染物降解. 这项研究揭示了EPS.

科学领域:

环境科学环境科学
环境化学环境化学
生物技术是生物技术.

背景情况:

细胞外聚合物物质 (EPS) 在环境污染物降解中发挥作用.
在密切合的光催化和生物降解 (ICPB) 中,EPS光敏感化的协同效应尚不清楚.
17β-雌二醇3-硫酸盐 (E2-3S) 是一种新兴的环境污染物.

研究的目的:

调查EPS光敏化在ICPB系统内17β-雌二醇3-硫酸盐 (E2-3S) 降解中的关键作用.
为了阐明EPS组件在降解过程中的转变.
了解EPS光敏化对反应性物种产生和污染物去除的影响.

主要方法:

进行了亲密合的光催化和生物降解 (ICPB) 实验.
在宽松结合的EPS (LB-EPS) 和紧密结合的EPS (TB-EPS) 中分析蛋白质和多糖含量.
反应性物种的表征,EPS分子转化 (使用O/C和H/C比率),以及E2-3S.的降解效率.

主要成果:

在ICPB条件下,LB-EPS和TB-EPS中的蛋白质和多糖含量显著增加.
LB-EPS产生了更多的反应性物种,导致E2-3S.降解99.8%.
EPS光敏感化涉及托类和氨酸类蛋白质的转化,并改变了水友和不和分子的组成.

结论:

在ICPB系统中,EPS光敏化是提高污染物降解的关键因素.
在辐射下EPS组件的转化有助于产生反应性物种和有效的污染物去除.
这项研究为环境修复的EPS光敏化机制提供了新的见解.

关键词:

细胞外聚合物质是细胞外的聚合物质.密切合的TiO(2) 光催化和生物降解.分子组成的分子组成.光化学行为.有反应性的物种.

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