Xin X, Liu H, Sun J, Gao K, Jia R
Shandong Province Water Supply and Drainage Monitoring Center, Jinan, 250101 China.
School of Water Conservancy and Environment, University of Jinan, Jinan, 250022 China.
Int J Environ Sci Technol (Tehran). 2023 Jan 18:1-12. doi: 10.1007/s13762-023-04771-6.
The composite material based on , , and Fe-doped TiO (NSFe-TiO) synthesized by wet impregnation was used as a photocatalyst to rapidly degrade sulfadiazine. The photocatalytic degradation behavior and mechanism of sulfadiazine on NSFe-TiO were investigated for revealing the role of degradation under ultraviolet light. The results showed that compared with TiO, NSFe-TiO markedly improved the efficiency in photocatalytic degradation of sulfadiazine: more than 90% of sulfadiazine could be removed within 120 min by NSFe-TiO dosage of 20 mg L. The process conformed to first-order reaction kinetics model. The parameters such as loaded amount of NSFe-TiO, solution pH value, humic acid concentration and recycle numbers on removal efficiency were also studied. Compared to neutral and alkaline conditions, acidic condition was not conducive to the photocatalysis. HA, Ca, Cu and Zn in the actual water body had mild inhibition on sulfadiazine degradation in UV/NSFe-TiO system. Fragments screened by high-resolution mass spectrometry were conducted to explore the oxidation mechanism and pathways of sulfadiazine degradation. On the whole, UV/NSFe-TiO photocatalysis has a good effect on sulfadiazine removal.
The online version contains supplementary material available at 10.1007/s13762-023-04771-6.
采用湿浸渍法合成的基于 、 和铁掺杂二氧化钛（NSFe-TiO）的复合材料作为光催化剂，用于快速降解磺胺嘧啶。研究了磺胺嘧啶在 NSFe-TiO 上的光催化降解行为和机理，以揭示紫外光下的降解作用。结果表明，与 TiO 相比，NSFe-TiO 显著提高了磺胺嘧啶的光催化降解效率：在 20 mg/L 的 NSFe-TiO 用量下，120 分钟内可去除 90%以上的磺胺嘧啶。该过程符合一级反应动力学模型。还研究了 NSFe-TiO 负载量、溶液 pH 值、腐殖酸浓度和循环次数等参数对去除效率的影响。与中性和碱性条件相比，酸性条件不利于光催化。实际水体中的 HA、Ca、Cu 和 Zn 对 UV/NSFe-TiO 体系中磺胺嘧啶的降解有轻微抑制作用。通过高分辨率质谱筛选碎片，以探索磺胺嘧啶降解的氧化机理和途径。总体而言，UV/NSFe-TiO 光催化对磺胺嘧啶的去除效果良好。
在线版本包含可在 10.1007/s13762-023-04771-6 获得的补充材料。
