在直接和根性臭氧化过程中硫甲醇的氧化转化:途径,动力学和水质影响
Unai Duoandicoechea1, Jorge Sáiz2, Senentxu Lanceros-Méndez3
1Department of Environmental and Chemical Engineering, Faculty of Engineering Vitoria-Gasteiz, University of the Basque Country UPV/EHU, Vitoria- Gasteiz, 01006, Spain.
Journal of environmental management
|February 13, 2026
概括
臭氧在水中有效降解抗生素硫甲醇 (SMX). 与性条件相比,酸性条件促进更快的SMX去除和更高的矿化.
科学领域:
- 环境化学环境化学
- 水处理技术水处理技术
背景情况:
- 硫甲醇 (SMX) 是水生环境中的一种持久性抗生素污染物.
- 先进的氧化过程 (AOP) 对于去除SMX至关重要,但其降解途径很复杂.
- 了解pH对臭氧化的影响是优化SMX去除的关键.
研究的目的:
- 通过在不同的pH条件下 (酸性与性) 使用臭氧化来研究硫甲醇 (SMX) 的降解.
- 阐明分子臭氧和基激素对SMX转化和矿物化的影响.
- 为了比较酸性和性臭氧化在改善水质参数方面的效率.
主要方法:
- 在pH 3.0 (分子臭氧主导) 和pH 13.0 (基主导) 的SMX臭氧化.
- 对SMX降解和中间体形成的动态分析.
- 测量用于矿化评估的总有机碳 (TOC) 移除量.
- 监测水质参数,包括颜色和芳香度.
主要成果:
- SMX降解遵循伪第一阶动力学,在酸性pH下比性pH (0.2231分钟-1) 的速度常数 (0.3541分钟-1) 高.
- 酸性臭氧化导致了快速的SMX去除和更高的矿化 (36.9%的TOC减少),而性臭氧化显示了可以忽略的TOC减少 (2.1%).
- 在性条件下观察到明显的中间形状和更长的副产品持久性.
结论:
- 氧化模式 (分子臭氧与基相比) 在很大程度上决定了SMX降解途径和效率.
- 酸性臭氧化更有效地消除SMX和改善水质,包括矿化.
- 优化pH值对于提高SMX污染水处理中臭氧化的性能至关重要.
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