Wang Yun-Dong, Chen Yi-Jun, Cheng Mei-Na, Liu Xin
Institute of Environmental Protection Application Technology, School of Environmental Science and Engineering, Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, Suzhou, Jiangsu Province, China.
Suzhou Kete Environmental Protection Co., Ltd., Suzhou, Jiangsu Province, China.
Turk J Chem. 2023 Jun 23;47(6):1307-1319. doi: 10.55730/1300-0527.3615. eCollection 2023.
In this paper, a novel Fenton reaction system which was called MHACF-MIL-100(Fe) was constructed. In this system, based on active hydrogen-accelerated Fe reduction, the hydroxyl radical was continuously produced with a trace amount of total iron. The MIL-100(Fe) modified with the nano-Pd particle could be used to activate the H. Under normal temperature and pressure, the target organic pollutants, such as sulfamethazine and 4-chloro phenol, could be degraded fast. In the condition of initial aqueous solution pH 3, 2 g L dosage of MIL-100(Fe) catalyst loaded with nano-Pd, Pd/MIL-100(Fe), 20 mM 30 wt% hydrogen peroxide, 25 μM ferrous chloride and 60 mL H min, 97.8% of sulfamethazine and 100% 4-chloro phenol could be degraded within only 5 min, respectively. Although the surface of the catalyst exhibited more obvious defects and roughness after 5 consecutive destructive experiment cycles, its basic structure could be maintained. The removal efficiency could be maintained at least more than 79% (sulfamethazine) and 94% (4-chloro phenol). That may be mainly attributed to the degradation of hydroxyl radical.
本文构建了一种新型的芬顿反应体系，即MHACF-MIL-100(Fe)。在该体系中，基于活性氢加速铁还原，利用痕量的总铁持续产生羟基自由基。用纳米钯颗粒改性的MIL-100(Fe)可用于活化H。在常温常压下，磺胺二甲嘧啶和4-氯苯酚等目标有机污染物可被快速降解。在初始水溶液pH为3、负载纳米钯的MIL-100(Fe)催化剂（Pd/MIL-100(Fe)）用量为2 g/L、20 mM 30 wt%过氧化氢、25 μM氯化亚铁以及60 mL H min的条件下，仅5分钟内磺胺二甲嘧啶和4-氯苯酚的降解率分别可达97.8%和100%。尽管经过5次连续的破坏性实验循环后催化剂表面出现了更明显的缺陷和粗糙度，但其基本结构仍能保持。去除效率至少可维持在79%以上（磺胺二甲嘧啶）和94%以上（4-氯苯酚）。这可能主要归因于羟基自由基的降解作用。
