Photocatalysis and ozonation have limited efficiency for the degradation of persistent pollutants as well as the mineralization of byproducts. In this work, we intensify the degradation processes by using simultaneously both processes in macroporous catalytic supports under mild reaction conditions, for degradation of tetracycline. The total organic carbon removal reached up to 90% after 180 min of photocatalytic ozonation reaction, achieving this record value using mild conditions. A comparison among processes showed the synergetic effect of photocatalysis and ozonation carried out in the macroporous support, which presents a kinetics increase of ≈20% greater than the sum of the separated processes. About 100% of tetracycline degradation was achieved with a high total organic carbon removal. This effect is attributed to synergy with the porous structure, which promote better O₃ and O₂ species mass transfer, due to the tortuosity and turbulence developed within the structure channels, coupled with a augmented residence time of the reactants. The gas-liquid mixture moves slower inside the porous channels, the apparent relative viscosity of a bubble train can be orders of magnitude larger than the viscosity of the pure liquid within the channels. In this work conditions were estimated as 10 times greater per bubble. The better species distribution, the increased residence time, and e⁻/h + recombination hindering along an increase of free hydroxyl radicals improved the overall degradation of tetracycline, avoiding the use of free catalysts and allowing the direct reuse of the system.

光催化和臭氧化对持久性污染物的降解以及副产物矿化的效率有限。在这项工作中，我们通过在温和的反应条件下同时在大孔催化载体中同时使用两种方法来降解四环素来加强降解过程。在180分钟的光催化臭氧氧化反应后，总有机碳去除率达到90％，在温和条件下达到该记录值。过程之间的比较表明，在大孔载体中进行了光催化和臭氧化的协同作用，与分离过程的总和相比，动力学增加了约20％。通过高的总有机碳去除率可实现约100％的四环素降解。₃和O ₂物质的传质，是由于结构通道内形成的曲折和湍流，加上反应物的停留时间增加。气液混合物在多孔通道内的移动较慢，气泡序列的表观相对粘度可能比通道内纯液体的粘度大几个数量级。在这种工作条件下，估计每个气泡要大10倍。更好的物种分布，增加的停留时间，和E ^- / H +重组沿增加的游离羟基自由基阻碍提高四环素的整体退化，避免使用不含催化剂和使系统的直接再利用。