State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing, 210023, Jiangsu, PR China.
Department of Zoology, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia.
Chemosphere. 2024 Feb;349:140952. doi: 10.1016/j.chemosphere.2023.140952. Epub 2023 Dec 13.
The degradation process of bisphenol S (BPS) in ozone/peroxymonosulfate (O/PMS) system was systematically explored. The results showed that the removal efficiency of BPS by O could be significantly improved with addition of PMS. Compared with ozonation alone, the pseudo-first-order constant (k) was increased by 2-5 times after adding 400 μM PMS. In O/PMS system, accelerated removal of BPS was observed under neutral and alkaline conditions. The removal efficiency of BPS reached 100% after 40 s of reaction at pH 7.0, with the k of 0.098 s. Moreover, Cu had a catalytic effect on the O/PMS system, because it could catalyze the decomposition of ozone and PMS to produce •OH and SO, respectively. Electron paramagnetic resonance illustrated that •OH and SO were the reactive species in O/PMS system. Twelve intermediates were identified by mass spectrometry, and the degradation reactions in O/PMS system mainly included hydroxylation, sulfate addition, polymerization and β-scission. Finally, the toxicity of the products was evaluated by the EOCSAR program. Our results introduce an efficient method for BPS removal and would provide some guidance for the development of O-based advanced oxidation technology.
系统研究了臭氧/过一硫酸盐（O/PMS）体系中双酚 S（BPS）的降解过程。结果表明，添加过一硫酸盐可显著提高臭氧对 BPS 的去除效率。与单独的臭氧氧化相比，添加 400 μM 的过一硫酸盐后，伪一级常数（k）增加了 2-5 倍。在 O/PMS 体系中，在中性和碱性条件下观察到 BPS 的加速去除。在 pH 值为 7.0 时，反应 40 s 后 BPS 的去除效率达到 100%，k 值为 0.098 s。此外，Cu 对 O/PMS 体系具有催化作用，因为它可以分别催化臭氧和过一硫酸盐的分解生成•OH 和 SO。电子顺磁共振表明，•OH 和 SO 是 O/PMS 体系中的活性物质。通过质谱鉴定了 12 种中间产物，O/PMS 体系中的降解反应主要包括羟化、硫酸盐加成、聚合和β断裂。最后，通过 EOCSAR 程序评估了产物的毒性。我们的研究结果为 BPS 的去除提供了一种有效的方法，并为 O 基高级氧化技术的发展提供了一些指导。
