UV/sulfite process in the absence of oxygen was previously applied as an advanced reduction process for the removal of many halogenated organics and inorganics in water and wastewater. Here, it was found that UV/sulfite process in the presence of oxygen could act as an advanced oxidation process. Specifically, the oxysulfur radicals (including sulfate radical (${\text{SO}}_4^{·-}$) and sulfite/peroxomonosulfate radicals (${\text{SO}}_3^{·-}$/${\text{SO}}_5^{·-}$)) played important roles on the degradation of iopamidol (IPM) as a typical iodinated contrast media (ICM). Furthermore, the contribution of ${\text{SO}}_4^{·-}$ on IPM removal gradually increased as pH increased from 5 to 7 and that of ${\text{SO}}_3^{·-}$/${\text{SO}}_5^{·-}$ decreased. Besides, all water quality parameters (i.e., chloride (Cl⁻), iodide (I⁻) and natural organic matter (NOM)) investigated here exhibited inhibitory effect on IPM removal. Three inorganic iodine species (i.e., I⁻, reactive iodine species and iodate (IO₃⁻)) were detected in UV/sulfite process in the presence of oxygen, while only I⁻ was detected in that without oxygen. During UV/sulfite/ethanol, UV photolysis and UV/peroxydisulfate (PDS)/tert-butyl alcohol (TBA) processes, thirteen transformation products including eleven deiodinated products of IPM were identified by ultra HPLC quadrupole time of flight-mass spectrometry (UPLC-Q-TOF-MS). Besides, these products generated by direct UV photolysis, ${\text{SO}}_4^{·-}$ and ${\text{SO}}_3^{·-}$/${\text{SO}}_5^{·-}$ were further distinguished. The acute toxicity assay of Vibrio fischeri indicated that transformation products by UV/sulfite under aerobic conditions were less toxic than that by direct UV photolysis.

以前，在没有氧气的情况下使用UV /亚硫酸盐工艺作为先进的还原工艺，用于去除水和废水中的许多卤代有机物和无机物。在此，发现在氧气存在下的UV /亚硫酸盐过程可以作为高级氧化过程。具体而言，氧硫自由基（包括硫酸自由基（${\text{所以}}_4^{·-}$）和亚硫酸根/过氧一硫酸根（${\text{所以}}_3^{·-}$/${\text{所以}}_5^{·-}$））在作为典型碘化造影剂（ICM）的碘帕醇（IPM）降解中发挥了重要作用。此外，${\text{所以}}_4^{·-}$ 随着pH值从5增加到7，IPM去除率逐渐增加， ${\text{所以}}_3^{·-}$/${\text{所以}}_5^{·-}$减少了。此外，所有水质参数（即，氯（氯^- ），碘化物（I ^- ）和天然有机物质（NOM））研究这里展示上IPM去除抑制作用。三种无机碘物种（即，I ^- ，反应性碘物质和碘酸盐（IO ₃ ^- ））在UV中氧的存在/亚硫酸盐处理中检测到，而只有我^-在所检测没有氧气。在紫外线/亚硫酸盐/乙醇，紫外线光解和紫外线/过氧二硫酸盐（PDS）/叔叔期间通过超高效液相色谱四极杆飞行时间质谱（UPLC-Q-TOF-MS）鉴定了丁醇（TBA）工艺中的13种转化产物，其中包括11种IPM的碘化产物。此外，这些产品是由直接的紫外线光解产生的，${\text{所以}}_4^{·-}$ 和 ${\text{所以}}_3^{·-}$/${\text{所以}}_5^{·-}$被进一步区分。费氏弧菌的急性毒性试验表明，在好氧条件下，UV /亚硫酸盐转化产物的毒性小于直接UV光解产物。