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在臭氧化过程中解读基的杀毒潜力:对水传播病毒无活化的影响
Zhiting Liang1, Chenyang Xu1, Xirui Zhou1
1State Key Joint Laboratory of Environment Simulation and Pollution Control, Key Laboratory of Microorganism Application and Risk Control (Ministry of Ecology and Environment), School of Environment, Tsinghua University, Beijing 100084, China.
基 (•OH) 显著增强了水传播病毒的臭氧消毒,使它们比单独的臭氧更快地失活. 了解OH机制是先进水处理策略的关键.
科学领域:
- 环境科学 环境科学
- 水处理 处理水的方法
- 微生物学 微生物学
背景情况:
- 水中的病毒污染对公共卫生构成重大风险,需要有效的消毒方法.
- 臭氧是一种强大的消毒剂,但基 (•OH) 在其杀毒功效中的特定作用需要进一步阐明.
- 关于在臭氧化过程中通过OH介导的病毒失活的动力学和分子机制的数据有限.
研究的目的:
- 研究基 (•OH) 在臭氧化水消毒中的作用和影响因素.
- 阐明通过OH增强臭氧杀毒活性的动力和分子机制.
- 为优化对水传播病毒的臭氧消毒策略提供理论基础.
主要方法:
- 对OH和臭氧对Phi6和PhiX174病毒的失活率常数的动力分析.
- 在不同的pH值和温度条件下,量化OH对减少病毒感染性的贡献.
- 使用分子生物学技术和密度功能理论计算评估病毒基因组损伤.
主要成果:
- 臭氧衍生 •OH 呈现出比臭氧分子对 Phi6 和 PhiX174.4 的4-5 个数量级更高的无活化速率常数.
- •OH在20°C和pH7.0下对病毒失活的贡献为11.3%至52.7%; •OH产量在pH (6.0-8.0) 时增加.
- •与单独的臭氧相比,OH 引起的病毒基因组损伤明显更大 (297-343%更高的基因拷贝日志减少).
结论:
- 基 (•OH) 是臭氧消毒的关键因素,显著提高病毒失活率和基因组损伤.
- pH 是影响 •OH 产量和随后的病毒失活的关键因素,而温度则影响氧化剂反应性.
- 了解OH机制为开发先进的氧化过程提供了基础,以有效控制水中传播的病毒.
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