ZrO2 supported perovskite activation of peroxymonosulfate for sulfamethoxazole removal from aqueous solution

被引：13
作者：
Jia, Muhan
Fan, Yan
Sun, Zhirong
Hu, Xiang
机构：
[1] College of Chemical Engineering, Beijing University of Chemical Technology, Beijing
[2] College of Environmental & Energy Engineering, Beijing University of Technology, Beijing
来源：
CHEMOSPHERE | 2022年 / 298卷
基金：
中国国家自然科学基金;
关键词：
Heterogeneous catalyst; Perovskite; Peroxymonosulfate; Sulfamethoxazole; Sulfate radical; HETEROGENEOUS ACTIVATION; SULFATE RADICALS; DEGRADATION; PERSULFATE; CATALYST; GENERATION; OXIDATION; OXIDE; TOXICITY; PRODUCTS;
D O I：
10.1016/j.chemosphere.2022.134339
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
In this study, A-and B-site doped perovskite La0.5Sr0.5Co0.8Ni0.2O3 (LSCN) was prepared by sol-gel method. On this basis, ZrO(2 )supported LSCN used to maintain high catalytic activity while inhibit the leaching of toxic Co ions. Compared with the non-doped LaCoO3, the ZrO2@La0.5Sr0.5Co0.8Ni0.2O3 (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-1. Free radical quenching experiments and electron paramagnetic resonance experiments proved that active species SO4 center dot-, center dot OH and O-1(2) existed in the Z@LSCN82/PMS system, and SO(4)(center dot- )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 HPO4- 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.
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页数：9
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