Jia Muhan, Fan Yan, Sun Zhirong, Hu Xiang
College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, PR China.
College of Environmental & Energy Engineering, Beijing University of Technology, Beijing, 100124, PR China.
Chemosphere. 2022 Jul;298:134339. doi: 10.1016/j.chemosphere.2022.134339. Epub 2022 Mar 15.
In this study, A- and B-site doped perovskite LaSrCoNiO （LSCN) was prepared by sol-gel method. On this basis, ZrO supported LSCN used to maintain high catalytic activity while inhibit the leaching of toxic Co ions. Compared with the non-doped LaCoO, the ZrO@LaSrCoNiO (Z@LSCN82)/PMS system could almost completely degrade SMX in 30 min. In addition, the leaching amount of Co ions was only 0.303 mg L. Free radical quenching experiments and electron paramagnetic resonance experiments proved that active species SO, •OH and O existed in the Z@LSCN82/PMS system, and SO played a major role. Besides, the catalyst had high efficiency for SMX degradation in a wide pH range. In addition, co-existing anions in water such as HPO and Cl also showed slight inhibition of the system. It was indicated that the Z@LSCN82/PMS system had huge potential applications for practical wastewater treatment.
在本研究中，采用溶胶-凝胶法制备了A位和B位掺杂的钙钛矿型LaSrCoNiO（LSCN）。在此基础上，使用ZrO负载的LSCN来保持高催化活性，同时抑制有毒Co离子的浸出。与未掺杂的LaCoO相比，ZrO@LaSrCoNiO（Z@LSCN82）/PMS体系能够在30分钟内几乎完全降解磺胺甲恶唑（SMX）。此外，Co离子的浸出量仅为0.303 mg/L。自由基猝灭实验和电子顺磁共振实验证明，Z@LSCN82/PMS体系中存在活性物种SO、•OH和O，且SO起主要作用。此外，该催化剂在较宽的pH范围内对SMX降解具有高效性。此外，水中共存的阴离子如HPO和Cl对该体系也表现出轻微的抑制作用。结果表明，Z@LSCN82/PMS体系在实际废水处理中具有巨大的潜在应用价值。
