Surface waters are often charged with high amounts of natural organic matter (NOM), organic contaminants and pathogens. In this work, a Vacuum UV/PMS process (VUV-UVC/PMS) was employed for treating river water, assessing the simultaneous NOM mineralization and bacterial disinfection. The VUV-UVC process (without PMS) decreased TOC concentration from 3.83 to 0.15 mg/L within 20 min, achieving complete disinfection. Adding 5 mg/L PMS increased the rate of TOC removal by 80%; complete removal of TOC was achieved in 15 min and disinfection was attained twice as fast. The mechanism of NOM mineralization was scrutinized; aeration played a considerable role due to oxygen supply, mixing, and inducing in-situ H₂O₂ production. ${\mathrm{HO}}^{\mathrm{•}}$ and ${\mathrm{SO}}_4^{\mathrm{•}-}$ were the main radical species involved, alongside an important contribution of the matrix; sulfate enhanced TOC removal, due to the formation of additional radicals, underlining its importance. Furthermore, over 99% TOC reduction and complete disinfection was achieved in the VUV-UVC/PMS process operated under continuous-flow mode with a 2-min hydraulic retention time. Finally, the use of Atrazine (ATZ) as a probe compound and a series of scavenging tests led to an integrated proposal for the mineralization of NOM. Accordingly, the VUV-UVC/PMS process is evaluated as an efficient and promising technology for surface water treatment.

地表水通常富含大量的天然有机物（NOM），有机污染物和病原体。在这项工作中，采用真空UV / PMS工艺（VUV-UVC / PMS）处理河水，评估同时发生的NOM矿化和细菌消毒。VUV-UVC工艺（无PMS）可在20分钟内将TOC浓度从3.83降至0.15 mg / L，从而实现完全消毒。添加5 mg / L PMS可将TOC去除率提高80％；在15分钟内完全去除了TOC，消毒速度提高了两倍。仔细研究了NOM矿化的机制；曝气在氧气供应，混合和诱导原位H ₂ O ₂产生方面起着重要作用。${\mathrm{HO}}^{\mathrm{•}}$ 和 ${\mathrm{所以}}_4^{\mathrm{•}-}$是主要的自由基种类，以及基质的重要贡献；硫酸盐由于形成了其他自由基而提高了TOC去除率，这突出了其重要性。此外，在连续流模式下以2分钟的水力停留时间运行的VUV-UVC / PMS工艺中，TOC降低了99％以上，并且完全消毒了。最后，使用At去津（ATZ）作为探针化合物和一系列清除测试导致提出了关于NOM矿化的综合建议。因此，VUV-UVC / PMS工艺被评估为一种有效且有前途的地表水处理技术。