In this study, the degradation kinetics, and the formation of disinfection byproducts (DBPs) during iohexol chlor(am)ination were studied. The chlorination kinetics can be described using a second-order model. As the pH of the solution increased, the apparent second-order rate constant of iohexol chlorination increased considerably. The reaction rate constants of iohexol with HOCl and OCl⁻ were calculated as$(3.75\pm 0.70)\times {10}^{-4}$ and$(1.39\pm 1.19)\times {10}^{-4}$ M⁻¹s⁻¹, respectively. In addition, the chloramination of iohexol followed tertiary kinetics, and the maximum apparent rate constant of $3.78\times {10}^{-6}$ M⁻²s⁻¹ occurred at pH 7. NH₄⁺ can promote the degradation of iohexol during chlorination, whereas Br⁻ inhibits iohexol degradation during chloramination. The formation of conventional carbonated DBPs and emerging nitrogenated DBPs during chlor(am)ination of iohexol was measured. However, in the presence of bromide, the conversion of iohexol to toxic iodinated DBPs increased significantly during chlorination, and chlorination resulted in higher formation of toxic I-DBP compared to chloramination. Therefore, chloramine disinfection is preferred for treating raw water containing high bromide concentrations in terms of DBP formation control.

在这项研究中，研究了在碘海醇氯（氨）化过程中的降解动力学和消毒副产物（DBP）的形成。可以使用二阶模型描述氯化动力学。随着溶液pH值的升高，碘海醇氯化的表观二级速率常数显着增加。与次氯酸和OCL碘海醇的反应速率常数^-计算为$（3.75\pm 0.70）\times {10}^{--4}$ 和$（1.39\pm 1.19）\times {10}^{--4}$M ^-1 s ^-1。此外，碘海醇的氯化反应遵循三次动力学，最大表观速率常数为$3.78\times {10}^{--6}$中号^-2小号^-1在pH 7 NH发生₄ ⁺可以在氯化期间促进碘海醇的降解，而溴^-抑制氯胺期间碘海醇的降解。测量了碘海醇的氯（氨）化过程中常规碳酸化DBP和新兴的氮化DBP的形成。然而，在存在溴化物的情况下，氯化过程中碘海醇向有毒碘代DBP的转化显着增加，与氯化相比，氯化导致更高的有毒I-DBP形成。因此，就DBP形成控制而言，氯胺消毒优选用于处理含有高溴化物浓度的原水。