紫外线/和紫外线/作为超膜预处理技术的比较研究:性能,机制和DBPs的形成
Shengnan Chen1, Zhiwei Zhao1, Fuyi Cui1
1College of Environment and Ecology, Chongqing University, Chongqing 400045, PR China; Key Laboratory of the Three Gorges Reservoir Region's Eco-environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China.
Journal of hazardous materials
|August 11, 2023
概括
真空紫外线 (VUV) /预处理有效地去除天然有机物质 (NOM) 并控制超过 (UF) 膜污染. 与UV/工艺相比,这种方法还可以减少消毒副产品 (DBPs).
科学领域:
- 水处理技术水处理技术.
- 先进的氧化过程具有先进的氧化过程.
- 膜科学是一种科学.
背景情况:
- 水源中的天然有机物 (NOM) 导致显著的超过 (UF) 膜污染,限制了广泛的应用.
- 传统的紫外线/工艺在有效控制NOM和随后的消毒副产品 (DBP) 形成方面面临着挑战.
- 开发高效的预处理策略对于提高UF性能和水质至关重要.
研究的目的:
- 评估真空紫外线 (VUV) /作为UF膜污染控制的预处理策略的有效性.
- 为了比较VUV/与常规UV/过程在NOM去除和DBP形成中的性能.
- 研究VUV/预处理对可逆和不可逆的膜污染机制的影响.
主要方法:
- 对NOM降解的VUV/和UV/过程的比较研究.
- 在两种系统中计算稳态基度 ([HO•]ss,[Cl•]ss,[ClO•]ss).
- 通过测量可逆和不可逆的污染来评估膜污染控制.
- 在预处理和随后的化过程中形成的消毒副产品 (DBPs) 的量化.
主要成果:
- 与紫外线/相比,VUV/显示出更好的NOM去除能力,持续的基质形成.
- 紫外线/预处理显著改善了对可逆和不可逆的膜污染的控制.
- 在预处理过程中,VUV/系统产生的DBPs水平明显较低.
- 扩展的VUV/预处理 (120分钟) 在随后的消毒过程中有效控制了DBP的形成.
结论:
- 紫外线/预处理是一种非常有效的策略,可以缓解由NOM引起的UF膜污染.
- 这种先进的氧化过程在NOM降解和DBP控制方面比UV/具有优势.
- 紫外线/技术为提高水处理过程的效率和安全性提供了一个有希望的方法.
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