在连续流通的水消毒系统中,波长协同效应
Adithya Pai Uppinakudru1,2, Miguel Martín-Sómer1, Ken Reynolds2
1Department of Chemical and Environmental Technology, ESCET, Universidad Rey Juan Carlos, C/ Tulipán S/n, 28933, Mostoles, Madrid, Spain.
Water research X
|December 15, 2023
概括
结合紫外线LED波长 (265,275和310纳米) 增强了在水中的大肠杆菌失活. 三波长组合显示出显著的协同作用和水消毒的优越能效.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 摄影化学的使用.
背景情况:
- 紫外线LED技术已经推进了水消毒研究.
- 关于多个紫外线波长的协同效应存在争论.
- 大肠杆菌失活是水安全的一个关键指标.
研究的目的:
- 用三种UV LED波长 (265,275和310 nm) 来分析大肠杆菌的失活.
- 研究不同水矩阵中联合紫外线波长的潜在协同效应.
- 为了确定UV LED组合的能源效率,用于水的消毒.
主要方法:
- 单通流量实验,控制流量 (2L/分钟) 和停留时间 (0.75秒).
- 测试单个紫外线波长 (265,275,310 nm) 和它们的组合.
- 统计分析以确定协同效应.
- 根据失活的顺序计算电能.
主要成果:
- 265nm紫外线LED单独是最有效的 (2.2 ± 0.2日志单位).
- 310nm紫外线LED显示了最低的无活化率.
- 三种波长的组合使废水减少了4.4 ± 0.2日志.
- 在310nm与265nm或275nm的组合中观察到协同无活化.
- 三波长组合是最节能的.
结论:
- 310nm与265nm或275nm紫外线LED的组合显示出对Escherichia coli无活化的显著协同作用.
- 协同作用归因于使双重失活机制成为可能的排放光谱.
- 三波长紫外线LED组合为水消毒提供了最节能的解决方案.
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