Abstract：
The photo-Fenton process is effective for pathogen removal, and its low-cost versions can be applied in resource-poor contexts. Herein, a photo-Fenton-like system was proposed using low concentrations of iron oxides (hematite and magnetite) and persulfates (peroxymonosulfate - PMS, and peroxydisulfate - PDS), which exhibited excellent inactivation performance towards MS2 bacteriophages. In the presence of bacteria, MS2 inactivation was inhibited in H2O2 and PDS systems but promoted in PMS-involved systems. The inactivation efficacy of all the proposed systems for mixed bacteria and viruses was greater than that of the sole bacteria, showing potential practical applications. The inactivation performance of humic acid-incorporated iron oxides mediating photo-Fenton-like processes was also studied; except for the PMS-involved system, the inactivation efficacy of the H2O2- and PDS-involved systems was inhibited, but the PDS-involved system was still acceptable (< 2 h). Reactive species exploration experiments indicated that ·OH was the main radical in the H2O2 and PDS systems, whereas 1O2 played a key role in the PMS-involved system. In summary, hematite- and magnetite-mediated persulfate-assisted photo-Fenton-like systems at low concentrations can be used as alternatives to the photo-Fenton process for virus inactivation in sunny areas, providing more possibilities for point-of-use drinking water treatment in developing countries.
摘要：
photo-Fenton工艺对于去除病原体是有效的，它的低成本版本可以应用于资源贫乏的环境中。在这里，使用低浓度的氧化铁（赤铁矿和磁铁矿）和过硫酸盐（过氧单硫酸盐-PMS，和过氧二硫酸盐-PDS)，对MS2噬菌体表现出优异的灭活性能。在细菌的存在下，在H2O2和PDS系统中，MS2失活受到抑制，但在涉及PMS的系统中得到促进。所有提议的系统对混合细菌和病毒的灭活效力均大于唯一细菌的灭活效力，显示潜在的实际应用。还研究了掺入腐殖酸的氧化铁介导光Fenton样过程的失活性能；除了涉及PMS的系统外，H2O2-和PDS参与系统的失活功效被抑制，但PDS参与系统仍可接受(<2h)。反应性物种探索实验表明，·OH是H2O2和PDS系统中的主要自由基，而1O2在PMS参与系统中起关键作用。总之,低浓度的血铁矿和磁铁矿介导的过硫酸盐辅助的光Fenton样系统可以用作在阳光充足的地区进行病毒灭活的光Fenton过程的替代方法，为发展中国家的饮用水处理提供了更多的可能性。
