Zhu Yunqing, Wang Huan, Li Bingqing, Wang Tian, Zhu Yunfu, Hou Jianing
School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xian, 710021, PR China.
Shaanxi Haofengjingcheng Environmental Technology Co. LTD, Xian, 710021, PR China.
Chem Asian J. 2024 Mar 15;19(6):e202301128. doi: 10.1002/asia.202301128. Epub 2024 Feb 22.
In this study, a zero-gap flow-through microfluidic reactor was constructed for the degradation of tetracycline and norfloxacin in water using a porous Ti/RuO-IrO@Pt electrode as the anode and porous titanium plate as the cathode. The operation parameters included electrolyte type, electrolyte concentration, current density, initial concentration of pollutants and pH, were investigated. The degradation efficiency and energy consumption were calculated and compared with traditional electrolyzer. In the zero-gap flow-through microfluidic reactor, 100 % of both tetracycline and norfloxacin can be decomposed in 15 min, and high mineralization rate were achieved under the optimized reaction condition. And the reaction was consistent with pseudo-first-order kinetics with k value of 0.492 cm and 1.010 cm, for tetracycline and norfloxacin, respectively. In addition, the energy consumption was 28.33 kWh ⋅ kg TC and 8.36 kWh ⋅ kg NOR, for tetracycline and norfloxacin, respectively, which was much lower than that of traditional electrolyzer. The LC-MS results showed that tetracycline underwent a series of demethylation, dehydration and deamination reactions, and the norfloxacin went through ring opening reaction, decarboxylation and hydroxylation reaction, and finally both produced CO and HO.
在本研究中，构建了一种零间隙流通式微流体反应器，以多孔Ti/RuO-IrO@Pt电极作为阳极、多孔钛板作为阴极，用于降解水中的四环素和诺氟沙星。研究了操作参数，包括电解质类型、电解质浓度、电流密度、污染物初始浓度和pH值。计算了降解效率和能耗，并与传统电解槽进行了比较。在零间隙流通式微流体反应器中，四环素和诺氟沙星在15分钟内均可100%分解，在优化的反应条件下实现了高矿化率。该反应符合准一级动力学，四环素和诺氟沙星的k值分别为0.492 cm和1.010 cm。此外，四环素和诺氟沙星的能耗分别为28.33 kWh·kg TC和8.36 kWh·kg NOR，远低于传统电解槽。液相色谱-质谱结果表明，四环素发生了一系列脱甲基、脱水和脱氨基反应，诺氟沙星则经历了开环反应、脱羧和羟基化反应，最终二者均生成了CO和HO。
