R&D Center, Samsung Engineering Co. Ltd, 41 Maeyoung-Ro, 269 Beon-Gil, Youngtong-Gu, Suwon, Gyeonggi-Do, 16523, South Korea.
R&D Center, Samsung Engineering Co. Ltd, 41 Maeyoung-Ro, 269 Beon-Gil, Youngtong-Gu, Suwon, Gyeonggi-Do, 16523, South Korea.
Water Res. 2019 May 1;154:21-27. doi: 10.1016/j.watres.2019.01.037. Epub 2019 Feb 1.
The effect of dissolved oxygen (DO) on the degradation of methanol by ultraviolet (UV) light at 185 nm (UV-185) was examined in this study. The experiments were conducted using a bench-scale experimental apparatus that was operated under continuous conditions. In the control tests with various DO conditions, it was confirmed that UV irradiation of water without methanol produced approximately 54 μg/L of HO and removed 15%-90% of the DO. The production of HO was affected by the mixing conditions within the UV reactor and the dose of UV. The degradation efficiency of methanol by UV-185 irradiation improved linearly with increasing DO concentration, with more than 90% DO consumption. The maximum total organic carbon (TOC) removal rate was observed at 100 μg/L DO and 433 mW·sec/cm, the highest DO and dosage conditions in this study. The production of HO was also affected by DO concentration in the feed water, especially at the high UV dosage, in which lower HO production was observed at higher DO.
本研究考察了溶解氧（DO）对 185nm 紫外线（UV-185）光下甲醇降解的影响。实验采用连续操作的中试实验装置进行。在不同 DO 条件的对照实验中，证实了没有甲醇的水经紫外线照射会产生约 54μg/L 的 HO，并去除 15%-90%的 DO。HO 的产生受到 UV 反应器内混合条件和 UV 剂量的影响。UV-185 辐照对甲醇的降解效率随 DO 浓度的增加呈线性提高，超过 90%的 DO 被消耗。在本研究中最高的 DO 和剂量条件下，即 100μg/L DO 和 433mW·sec/cm 时，观察到最大的总有机碳（TOC）去除率。HO 的产生也受到进水 DO 浓度的影响，特别是在高 UV 剂量下，在较高的 DO 条件下，HO 的产生较低。
