单质子化孟加拉玫瑰：一种快速灭活饮用水中大肠杆菌的高效太阳能消毒剂

IF 11.3 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Journal of Hazardous Materials Pub Date : 2025-07-03 DOI:10.1016/j.jhazmat.2025.139133

Yi Liu, Xingyi He, Qisun Mao, Jiang Xu, Daohui Lin

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引用次数: 0

摘要

在贫困的农村地区和旅行中，迫切需要强大、便携和负担得起的使用点水消毒技术。本研究首次揭示了单质子化孟加拉玫瑰（RB）对大肠杆菌（E. coli）的灭活作用，并基于这一原理开发了一种很有前景的新型水消毒液。pH值的降低显著增强了RB对大肠杆菌的失活能力（高达2744倍），这归因于质子化过程而不是1O2浓度的变化。失活速率常数(k)与pH之间形成了一个独特的钟形曲线，这可以解释为在三种质子化状态中只有单质子化的RB具有杀菌活性。单质子化RB与k之间也建立了线性关系。鉴于RB在水消毒中具有较高的成本效益，并且对天然有机物和有机酸阴离子具有良好的耐受性，我们开发了一种新型的增强室外日光消毒的消毒粉，可在30分钟内对地表水样品进行消毒。新开发的太阳能光敏消毒剂有望显著改善农村地区和旅行期间的饮用水安全。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Monoprotonated Rose Bengal: A High-Efficiency Solar Disinfectant for Rapid Escherichia coli Inactivation in Drinking Water

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Monoprotonated Rose Bengal: A High-Efficiency Solar Disinfectant for Rapid Escherichia coli Inactivation in Drinking Water

Powerful, portable, and affordable point-of-use water disinfection technologies are urgently needed in impoverished rural areas and trips. In this study, we first revealed the outstanding inactivation of Escherichia coli (E. coli) by monoprotonated Rose Bengal (RB) and developed a promising new water disinfectant based on this principle. A decrease in pH dramatically enhanced the inactivation capability of RB against E. coli (up to 2744-fold), which was attributed to the protonation process rather than changes in ¹O₂ concentration. A distinctive bell-shaped curve was established between inactivation rate constant (k) and pH, explained by the fact that only monoprotonated RB among the three protonation states exhibited bactericidal activity. A linear relationship between monoprotonated RB and k was also established. Given that RB shows high cost-effectiveness for water disinfection and good tolerance to natural organic matter and organic acid anions, we developed a novel disinfectant powder to enhance outdoor solar disinfection, achieving disinfection within 30 min in surface water samples. The newly developed solar photosensitization disinfectant is anticipated to significantly improve the drinking water safety in rural areas and during travel expeditions.

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来源期刊

Journal of Hazardous Materials 工程技术-工程：环境

CiteScore

25.40

自引率

5.90%

发文量

3059

审稿时长

58 days

期刊介绍： The Journal of Hazardous Materials serves as a global platform for promoting cutting-edge research in the field of Environmental Science and Engineering. Our publication features a wide range of articles, including full-length research papers, review articles, and perspectives, with the aim of enhancing our understanding of the dangers and risks associated with various materials concerning public health and the environment. It is important to note that the term "environmental contaminants" refers specifically to substances that pose hazardous effects through contamination, while excluding those that do not have such impacts on the environment or human health. Moreover, we emphasize the distinction between wastes and hazardous materials in order to provide further clarity on the scope of the journal. We have a keen interest in exploring specific compounds and microbial agents that have adverse effects on the environment.