Department of Chemical and Materials Engineering, National Kaohsiung University of Science and Technology, 415 Chien Kung Road, Kaohsiung, Taiwan E-mail:
Water Sci Technol. 2020 Dec;82(11):2425-2431. doi: 10.2166/wst.2020.503.
This study investigates the removal of sulfamethizole (SFZ) in ozone (O), O/NaSO (sodium persulfate), UV/NaSO, UV/O, and UV/O/NaSO systems. The effects of pH and salinity on SFZ mineralization were evaluated. The mineralization of SFZ followed pseudo-first-order kinetics. At pH 5, the rate constants of SFZ mineralization in O, O/NaSO, UV/NaSO, UV/O, and UV/O/NaSO systems were 0.576, 0.924, 0.702, 1.26, and 5.21 h, respectively. The SFZ mineralization rate followed the order pH 5 > pH 7 > pH 9 in all tested advanced oxidation processes. Salinity increased the rate of SFZ mineralization in O and O/NaSO systems and decelerated it in UV/NaSO, UV/O, and UV/O/NaSO systems. UV/O/NaSO was the best system for mineralizing SFZ, and sulfate radicals were the predominant species in UV/O/NaSO.
本研究考察了臭氧（O）、O/NaSO（过硫酸钠）、UV/NaSO、UV/O 和 UV/O/NaSO 体系中磺胺甲恶唑（SFZ）的去除情况。评估了 pH 值和盐度对 SFZ 矿化的影响。SFZ 的矿化遵循准一级动力学。在 pH 5 时，O、O/NaSO、UV/NaSO、UV/O 和 UV/O/NaSO 体系中 SFZ 矿化的速率常数分别为 0.576、0.924、0.702、1.26 和 5.21 h。在所有测试的高级氧化工艺中，SFZ 矿化速率均遵循 pH 5 > pH 7 > pH 9 的顺序。盐度增加了 O 和 O/NaSO 体系中 SFZ 矿化的速率，而在 UV/NaSO、UV/O 和 UV/O/NaSO 体系中则减缓了矿化速率。UV/O/NaSO 是矿化 SFZ 的最佳体系，硫酸根自由基是 UV/O/NaSO 中的主要物种。
