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  4. The Mn(VII)-H2O2 oxidation process: Abatement of electron-deficient N-containing organic compounds
 
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research article

The Mn(VII)-H2O2 oxidation process: Abatement of electron-deficient N-containing organic compounds

Xu, Ke
•
Von Gunten, Urs  
January 16, 2024
Chemical Engineering Journal

Chemical oxidants applied in water treatment are electrophiles, which preferentially attack sites with higher electron density. This typically results in less efficient oxidative abatement of organic compounds with electronwithdrawing substituents. In this study, we observed that the permanganate-hydrogen peroxide (Mn(VII)-H2O2) process can enhance the abatement of some nitrogenous organic compounds with electron-withdrawing groups more significantly compared to Mn(VII) in absence of H2O2. A comparison of the oxidation of aniline and 4-chloroaniline, N,N-dimethylaniline and p-cyano-N,N-dimethylaniline, and hydrazine and acethydrazide for Mn(VII) and the Mn(VII)-H2O2 process was performed. It was observed that Mn(VII)-H2O2 can specifically enhance the oxidative abatement of the paired target compounds containing electron-withdrawing groups. By addition of Ba2+, to block the Mn(VI) reaction, it was demonstrated that Mn(VI) formed in the Mn(VII)-H2O2 process, was decisive for inducing the enhanced oxidation. This study reveals an interesting novel application of Mn(VII)- H2O2 for oxidative abatement of N-containing electron-deficient organic compounds during water treatment.

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Type
research article
DOI
10.1016/j.cej.2024.148630
Web of Science ID

WOS:001163968400001

Author(s)
Xu, Ke
•
Von Gunten, Urs  
Date Issued

2024-01-16

Publisher

Elsevier Science Sa

Published in
Chemical Engineering Journal
Volume

481

Article Number

148630

Subjects

Technology

•

Permanganate

•

Hydrogen Peroxide

•

N-Containing Organic Compounds

•

Oxidative Abatement

•

Electron-Deficiency

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LTQE  
FunderGrant Number

European Union

101022222

Available on Infoscience
March 18, 2024
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/206428
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