The degradation of Bisphenol A (BPA) in the vacuum ultraviolet/ ultraviolet/ peroxymonosulfate (VUV/UV/PMS) process based on a mini-fluidic VUV/UV photoreaction system has been comprehensively investigated focusing on the degradation performances and kinetics in this study. With 20 min reaction at pH 7.0 in VUV/UV/PMS process, the removal efficiency and the apparent degradation rate constant (k_app) of BPA were > 95.2 % and 0.145 min⁻¹ (R² = 0.9935). In addition, the impacts of operational parameters and co-existing constituents on BPA degradation are systematically evaluated. Importantly, the effective degradation of BPA (> 96.1 % at least) achieved at the test pH conditions (5–11) after 30 min reaction and achieved the highest BPA removal rate at pH = 11 (0.243 min⁻¹, R² = 0.9952). The electron paramagnetic resonance and radical scavenger experiments confirmed that both hydroxyl radical (OH) and sulfate radical (SO₄⁻) are the predominant reactive radicals in VUV/UV/PMS process. The second-order reaction rate constants of BPA with OH and SO₄⁻ under different pH conditions were determined to be 0.74–1.86 × 10¹⁰ M⁻¹ s⁻¹ and 2.92–5.01 × 10⁹ M⁻¹ s⁻¹ via the competition kinetics. Meanwhile, the relative contribution rate of OH decreased from 97.2 %–33.1 % with the increasement of pH from 5.0 to 11.0, while the relative contribution rate of SO₄⁻ rose from 1.7 % to 48.9 %. The present study demonstrated that the VUV/UV/PMS process, as a new advanced oxidation process, has potential applications for micropollutants removal in water.

在本研究中，着重研究了双酚A（BPA）在基于微流体VUV / UV光反应体系的真空紫外/紫外/过氧单硫酸盐（VUV / UV / PMS）过程中的降解。在VUV / UV / PMS过程中，在pH 7.0下反应20分钟，BPA的去除效率和表观降解速率常数（k _app）分别> 95.2％和0.145 min ^-1（R ²= 0.9935）。此外，系统地评估了操作参数和共存成分对双酚A降解的影响。重要的是，反应30分钟后，在测试pH条件（5-11）下BPA的有效降解（至少> 96.1％）达到了，并且在pH = 11时BPA去除率最高（0.243 min ^-1，R ² = 0.9952） ）。电子顺磁共振和自由基清除剂的实验证实，这两个羟基自由基（OH）和硫酸根（SO ₄ ^- ）是在VUV / UV / PMS过程的主要反应性自由基。与BPA的二阶反应速率常数OH和SO ₄ ^- ，测定不同pH条件下为0.74-1.86×10¹⁰ M ^-1 s ^-1和2.92–5.01×10 ⁹ M ^-1 s ^-1通过竞争动力学。同时，的相对贡献率OH从97.2％随着pH的increasement从5.0至11.0下降-33.1％，而SO的相对贡献率₄ ^-玫瑰从1.7％至48.9％。本研究表明，VUV / UV / PMS工艺作为一种新的高级氧化工艺，在去除水中的微污染物方面具有潜在的应用前景。