Synergistic oxidation of organic micropollutants by Mn(VII)/periodate system: Performance and mechanism was written by Niu, Lijun;An, Lili;Zhang, Kaiting;Chen, Qian;Yu, Xin;Zhang, Menglu;Feng, Mingbao. And the article was included in Separation and Purification Technology in 2022.Recommanded Product: 4,4′-Methylenediphenol The following contents are mentioned in the article:
The increased release of various emerging organic contaminants into natural waters has posed great threats to ecol. safety and public health. The ensuing global water contamination has necessitated the development of highly efficient treatment strategies for water purification Herein, we presented for the first time that the combined utilization of permanganate (Mn(VII)) and periodate (PI) could synergistically and rapidly accomplish complete destruction of different organic micropollutants (e.g., bisphenol F, methotrexate, and tetracycline) within 2-5 min. Comparatively, the single treatment only eliminated very small amounts of micropollutants. Mechanistic investigations were performed using the trapper-based ESR, scavenging and probe experiments, UV-vis spectra anal., determination of iodine species, and multiple validation tests. These data collectively suggested that the highly reactive Mn(V)/Mn(VI) intermediates played the leading role in accelerating contaminant abatement within the Mn(VII)/PI oxidation system. Reactive oxygen/or iodine species (1O2, ·OH, O2·–, IO3·, and IO4·) and low valence Mn species (Mn(II), Mn(III), and in-situ formed MnO2 colloids) did not participate in decontamination in this process. Subsequently, the oxidized products of three micropollutants were determined, and the transformation pathways were clarified. Ring-opening, C-C bond cleavage, demethylation, carbonylation, and hydroxylation reactions mainly occurred in the degradation process. Notably, the combined system did not yield any toxic iodinated end products. Finally, the environmental risks of the degradation products were also evaluated based on in silico QSAR-based prediction tools. Overall, this study provides a novel, highly efficient, and green treatment technol., i.e., Mn(VII)/PI system, which could be employed for rapid and sustainable water decontamination. This study involved multiple reactions and reactants, such as 4,4′-Methylenediphenol (cas: 620-92-8Recommanded Product: 4,4′-Methylenediphenol).
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