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水化学对基于臭氧纳米泡的先进氧化过程的影响

Andre Luna Magdaleno¹, Kathleen Myers-Haeussler¹, Kenneth Mensah²

¹Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ 85287-3005, USA.

|February 24, 2026

概括

臭氧纳米泡 (O3-NBs) 提供优质的臭氧传递,但它们的反应性和稳定性在很大程度上取决于水化学. 这些纳米泡在复杂的水基质中促进了选择性氧化,而不是广泛的矿化.

科学领域:

环境化学环境化学
水处理技术水处理技术
纳米技术纳米技术

背景情况:

臭氧纳米泡 (O3-NBs) 是由于增强的气体溶解和界面反应性而被建议用于先进的氧化过程 (AOP).
然而,它们在现实的水矩阵中的性能仍然不充分理解,需要进行全面的评估.

研究的目的:

研究O3-NBs在各种水类,包括超纯水,淡水和海水中的生成,稳定性和反应性.
为了比较O3-NBs的质量转移和臭氧持久性与不同水化学的巨型气泡 (MBs).
阐明水矩阵组成对O3-NBs界面性质的影响及其对氧化机制和处理效率的影响.

主要方法:

在超纯水,合成/真实淡水和合成/真实海水中产生臭氧纳米泡和表征.
测量泽塔电位以评估表面电荷和矩阵依赖性.
动力学研究以确定质量转移系数 (kLa) 和臭氧衰变速率 (kd).
氧化副产品的分析和溶解有机碳 (DOC) 的去除.

主要成果:

在所有测试水域中,O3-NBs的质量转移系数比MBs高出一个数量级.
臭氧的持久性和衰变速度高度依赖于矩阵,在淡水和海水中由于离子和有机物种而加速分解.
在海水中,高离子强度导致了快速的臭氧消耗和大量的氧化成酸盐.
O3-NBs倾向于选择性氧化特定的有机分数 (类似化物) 而不是散装矿化,导致实际水样中的DOC去除有限.

结论:

O3-NBs在水处理中的有效性主要取决于水化学和界面现象,而不仅仅是通过增强臭氧输送.
虽然O3-NBs可以改善臭氧质量转移,但它们的应用需要仔细考虑对臭氧稳定性和反应选择性的矩阵效应.
了解这些矩阵特异性相互作用对于优化以臭氧为基础的AOP至关重要,特别是在盐水环境中.

关键词:

先进的氧化过程具有先进的氧化过程.酸酸盐是一种酸盐.有反应性氧物种的反应性氧物种.化出来的效果是化出来的.水矩阵是一个水矩阵.泽塔潜力是什么意思

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