The degradation of 2.6 μM (2 mg/L) iopamidol (IOPA), a commercially important nonionic, iodinated X-ray contrast chemical and model micropollutant, by UV-A and UV-C photo-assisted persulfate (PS) oxidation in real, tertiary treated municipal wastewater (Organic carbon = 12.4 mg/L; Alkalinity = 130 mg CaCO₃/L; pH = 7.0) was investigated. Preliminary baseline experiments conducted in pure (distilled) water indicated that IOPA could be rapidly and completely removed even by UV-C treatment alone. In the presence of UV-A light, 100% IOPA removal could still be achieved in pure water by PS/UV-A treatment which was studied at varying conditions (0.10–1.00 mM; pH3-11). However, in real wastewater, addition of at least 0.10 mM and 1.00 mM PS was required to achieve high (>90%) IOPA removals by the PS/UV-C and PS/UV-A treatment systems, respectively. PS consumption rates increased under UV-C radiation compared with UV-A radiation and in real wastewater compared to pure water. Organic carbon removals were appreciable for PS/UV-C (48%) and UV-C (40%) treatments in real wastewater. Toxicity assays carried out with the marine photobacteria Vibrio fischeri revealed that the toxicity response did not change significantly after photochemical treatment. According to the bioassay conducted with the freshwater microalga Pseudokirchneriella subcapitata, the toxicity increased after 155 min UV-C photolysis.

实际通过UV-A和UV-C光辅助过硫酸盐（PS）氧化降解2.6μM（2 mg / L）碘帕醇（IOPA）（一种商业上重要的非离子，碘化X射线造影剂和模型微污染物），经三次处理的城市废水（有机碳= 12.4 mg / L；碱度= 130 mg CaCO ₃/ L; pH = 7.0）进行了研究。在纯净水（蒸馏水）中进行的初步基准实验表明，即使仅通过UV-C处理，也可以快速，完全地去除IO​​PA。在存在UV-A光的情况下，通过在不同条件下（0.10–1.00 mM; pH3-11）进行研究的PS / UV-A处理，仍可以在纯水中实现100％IOPA去除。但是，在实际废水中，需要分别添加至少0.10 mM和1.00 mM PS才能通过PS / UV-C和PS / UV-A处理系统分别实现高（> 90％）IOPA去除率。与UV-A辐射相比，在UV-C辐射下以及与纯净水相比，在实际废水中PS的消耗率增加。对于实际废水中的PS / UV-C（48％）和UV-C（40％）处理，有机碳去除量可观。用海洋光细菌进行的毒性试验费氏弧菌表明，光化学处理后毒性反应没有明显改变。根据使用淡水微藻次生假单胞菌的生物测定，在155分钟的UV-C光解后，毒性增加。