In the present work, effect of coexisting anions on the degradation performance of UV/chlorine (UV/Cl) processes as an advanced oxidation treatment for the dye containing wastewater was investigated. The results showed that by increasing pH of the solution from 3 to 11, degradation efficiency of UV/Cl process was reduced from 96.2 ± 1.4% to 62.9 ± 3.1%. In the case of 100 mg/L of DR83:1, the removal efficiency was improved from 30.2 ± 1.5% to 93.3 ± 4.7% when the chlorine dose was increased from 100 to 1000 μM. The HCO₃ˉ and Br⁻ ions were the main inhibitor and promotor anions responsible for the degradation of DR83:1. The relative contribution of Cl^• was higher than that for HO^• and UV, which was about three-times higher than that for HO^•. The lowest and highest amounts of trihalomethanes were generated at acidic and alkaline conditions as well as low disinfection by products at low pH due to the generation of more HO^• radicals at acidic pH in comparison to higher pH such that less intermediates were remained to react with chlorine.

在目前的工作中，研究了共存阴离子对紫外线/氯 (UV/Cl) 工艺作为含染料废水的高级氧化处理的降解性能的影响。结果表明，通过将溶液的pH值从3提高到11，UV/Cl过程的降解效率从96.2±1.4%降低到62.9±3.1%。在 100 mg/L DR83:1 的情况下，当氯剂量从 100 μM 增加到 1000 μM 时，去除效率从 30.2±1.5% 提高到 93.3±4.7%。HCO₃ˉ 和 Br ^-离子是导致 DR83:1 降解的主要抑制剂和促进剂阴离子。Cl ^•的相对贡献高于 H2O ^•和 UV，约为 H2O ^{• 的}三倍. 最低和最高量的三卤甲烷是在酸性和碱性条件下产生的，以及在低 pH 下低消毒副产物的产生，因为与较高 pH 相比，酸性 pH 下会产生更多的 H2O ^•自由基，因此剩余的中间体较少氯。