Data underlying the publication: Effects of the Water Matrix on the Degradation of Micropollutants by a Photocatalytic Ceramic Membrane

The consumption of pharmaceuticals has increased the presence of micropollutants (MPs) in the environment. The removal and degradation of pharmaceutical mixtures in different water matrices are thus of significant importance. The photocatalytic degradation of four micropollutants—diclofenac (DCF), iopamidol (INN), methylene blue (MB), and metoprolol (MTP)—have been analyzed in this study by using a photocatalytic ceramic membrane. We experimentally analyzed the degradation rate by using several water matrices by changing the feed composition of micropollutants in the mixture (from mg.L^-1 to μg.L^-1), adding different concentrations of inorganic compounds (NaHCO₃ and NaCl), and by using tap water. A maximum degradation of 97% for DCF and MTP, and 85% for INN was observed in a micropollutants mixture in tap water at environmentally relevant feed concentrations [1–6 μg.L^-1]_o; and 86% for MB in an MPs mixture [1–3 mg.L^-1]_o with 100 mg.L^-1 of NaCl. This work provides further insights into the applicability of photocatalytic membranes and illustrates the importance of the water matrix to the photocatalytic degradation of micropollutants.

药物消费提升了环境中微污染物（micropollutants，MPs）的赋存水平。因此，去除不同水基质中的药物混合污染物并实现其降解，具有重要的研究意义。本研究采用光催化陶瓷膜，对四种微污染物——双氯芬酸（diclofenac，DCF）、碘帕醇（iopamidol，INN）、亚甲基蓝（methylene blue，MB）和美托洛尔（metoprolol，MTP）——的光催化降解性能展开了分析。实验中，我们通过调整混合体系内微污染物的进料浓度（从mg·L⁻¹级调整至μg·L⁻¹级）、添加不同浓度的无机化合物（碳酸氢钠NaHCO₃与氯化钠NaCl），并采用多种水基质（含自来水），对降解速率进行了探究。在环境相关初始进料浓度[1~6 μg·L⁻¹]ₒ的自来水微污染物混合体系中，DCF与MTP的最大降解率可达97%，INN的最大降解率为85%；而在初始浓度为[1~3 mg·L⁻¹]ₒ的微污染物混合体系中，当添加100 mg·L⁻¹的NaCl时，MB的降解率可达86%。本研究进一步阐明了光催化膜的应用潜力，并揭示了水基质对微污染物光催化降解过程的关键影响。