| Title | Activation of peracetic acid by metal-organic frameworks (ZIF-67) for efficient degradation of sulfachloropyridazine |
| Authors | Duan, Jun Chen, Long Ji, Haodong Li, Peishen Li, Fan Liu, Wen |
| Affiliation | Peking Univ, Coll Environm Sci & Engn, Key Lab Water & Sediment Sci, Minist Educ, Beijing 100871, Peoples R China Peking Univ, State Environm Protect Key Lab All Mat Fluxes Riv, Beijing 100871, Peoples R China |
| Keywords | REACTION PATHWAYS REMOVAL SULFAMETHAZINE NANOPARTICLES REDUCTION OXIDATION RADICALS KINETICS CO2 |
| Issue Date | Jun-2022 |
| Publisher | CHINESE CHEMICAL LETTERS |
| Abstract | Peracetic acid (PAA)-based system is becoming an emerging advanced oxidation process (AOP) for effective removal of organic contaminants from water. Various approaches have been tested to activate PAA, while no previous researches reported the application of metal-organic frameworks (MOFs) materials for PAA activation. In this study, zeolitic imidazole framework (ZIF)-67, a representative MOFs, was facile synthesized via direct-mixing method at room temperature, and tested for PAA activation and sulfachloropyridazine (SCP) degradation. The as-synthesized ZIF-67 exhibited excellent performance for PAA activation and SCP degradation with 100% of SCP degraded within 3 min, owing to the specific MOFs structure and abundant Co2+ sites. The pseudo-first-order kinetic model was applied to fit the kinetic data, with rate constant k(1) of ZIF-67 activated PAA system 34.2 and 156.5 times higher than those of conventional Co3O4 activated PAA and direct oxidation by PAA. Radical quenching experiments and electron paramagnetic resonance (EPR) analysis indicated that CH3C(O)OO center dot played a major role in this PAA activation system. Then, the Fukui index based on density functional theory (DFT) calculation was used to predict the possible reaction sites of SCP for electrophilic attack by CH3C(O)OO center dot. In addition, the degradation pathway of SCP was proposed based on Fukui index values and intermediates detection, which mainly included the S-N bond cleavage and SO2 extrusion and followed by further oxidation, dechlorination, and hydroxylation. Therefore, ZIF-67 activated PAA is a novel strategy and holds strong potential for the removal of emerging organic contaminants (EOCs) from water. (C) 2021 Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. |
| URI | http://hdl.handle.net/20.500.11897/646951 |
| ISSN | 1001-8417 |
| DOI | 10.1016/j.cclet.2021.11.072 |
| Indexed | SCI(E) |
| Appears in Collections: | 环境科学与工程学院 水沙科学教育部重点实验室（联合） |
