Different groups of disinfection by-products (DBPs) were studied through the degradation of iopamidol by the sequential oxidation process of ozone-low pressure ultraviolet light (O₃-LPUV) followed by chlorination. This paper investigates the attenuation of iopamidol under this sequential treatment and the effect of chlorine contact time (30 minutes versus 3 days) to control the formation potential of DBPs: trihalomethanes (THMs), haloacetonitriles (HANs) and haloacetamides (HAMs). Thirty target DBPs among the 9 iodinated-DBPs (I-DBPs), were monitored throughout the sequential treatment. Results showed that O₃-LPUV removed up to 99% of iopamidol, while ozone and LPUV alone removed only 90% and 76% respectively. After chlorine addition, O₃-LPUV yielded 56% lower I-DBPs than LPUV. Increasing chlorine contact time resulted in higher concentrations of all DBP groups (THMs, HANs, and HAMs), with the exception of I-DBPs. One new iodinated-haloacetamide, namely chloroiodoacetamide (CIACM) and one iodoacetonitrile (IACN) were detected. These results suggest the iodine incorporated in iopamidol may be a precursor for iodinated-nitrogenous-DBPs, which are currently not well studied.

通过臭氧低压紫外光（O ₃ -LPUV）的顺序氧化过程，然后进行氯化，通过降解碘帕醇，研究了不同种类的消毒副产物（DBP）。本文研究了依帕米多在这种顺序处理下的衰减以及氯接触时间（30分钟对3天）对控制DBPs形成潜力的影响：三卤甲烷（THMs），卤代乙腈（HANs）和卤代乙酰胺（HAMs）。在整个顺序治疗过程中，监测了9个碘化DBP（I-DBP）中的30个目标DBP。结果显示，O ₃ -LPUV最多可去除99％的碘帕米，而单独的臭氧和LPUV则仅分别去除90％和76％。加氯后，O ₃-LPUV产生的I-DBP比LPUV低56％。氯接触时间的增加导致所有DBP组（THM，HAN和HAM）的浓度升高，但I-DBP除外。检出了一种新的碘代卤代乙酰胺，即氯碘乙酰胺（CIACM）和一种碘乙腈（IACN）。这些结果表明，掺入碘帕醇中的碘可能是碘化DBPs的前体，目前尚未对此进行深入研究。