Household wastewaters contain microplastics and nanoplastics that end up in ecosystems because these pollutants are not filtered by current wastewater treatment plants. Therefore, there is a need for advanced removal technologies. Here, we tested the degradation of polymethylmethacrylate (PMMA) and polystyrene (PS) nanoparticles by photocatalysis with TiO₂–P25/β-SiC foams under UV-A radiation. We studied the effect of flow rate, initial pH and light intensity. Results show that about 50% of the carbon of polymethylmethacrylate nanobeads are degraded in 7 h at an irradiance of 112 W/m², a flow rate of 10 mL/min and an initial pH of 6.3. Degradation is faster at low pH (4–6) and low flow rate. 140-nm polystyrene degrades faster than 508-nm polystyrene.

家用废水中含有最终在生态系统中的微塑料和纳米塑料，因为这些污染物尚未被当前的废水处理厂过滤。因此，需要先进的去除技术。在这里，我们测试了TiO ₂ –P25 /β-SiC泡沫在UV-A辐射下的光催化降解聚甲基丙烯酸甲酯（PMMA）和聚苯乙烯（PS）纳米颗粒的能力。我们研究了流速，初始pH和光强度的影响。结果显示，在112 W / m ²的辐射，10 mL / min的流速和6.3的初始pH值下，聚甲基丙烯酸甲酯纳米珠的碳在约7小时内降解了约50％。在低pH（4–6）和低流速下降解速度更快。140纳米聚苯乙烯的降解速度比508纳米聚苯乙烯的降解速度更快。