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Exploring the Mechanism of Peroxodisulfate Activation with Silver Metavanadate to Generate Abundant Reactive Oxygen Species
Author(s) -
Singh Ajit Kumar,
Hollmann Dirk,
Schwarze Michael,
Panda Chakadola,
Singh Baghendra,
Menezes Prashanth W.,
Indra Arindam
Publication year - 2021
Publication title -
advanced sustainable systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.499
H-Index - 24
ISSN - 2366-7486
DOI - 10.1002/adsu.202000288
Subject(s) - chemistry , radical , catalysis , hydroxyl radical , reagent , mineralization (soil science) , reactive oxygen species , electron paramagnetic resonance , aqueous solution , inorganic chemistry , sulfate , reactive intermediate , photochemistry , vanadium , oxygen , organic chemistry , biochemistry , physics , nuclear magnetic resonance , nitrogen
Reactive oxygen species (ROS) containing sulfate and hydroxyl radicals can act as Fenton type reagents to remove organic contaminants from water. Here, a catalytic system silver metavanadate is reported for the activation of peroxodisulfate in an aqueous medium to generate ROS, which is further utilized for the efficient degradation of the water‐soluble pollutants such as phenols, pesticides, antibiotics, and organic dyes. Remarkably, complete carbon mineralization of the water‐soluble contaminants is achieved to form carbon dioxide as the major product. In‐situ electron paramagnetic resonance (EPR) studies combined with ex‐situ methods reveal that a massive amount of hydroxyl radicals ( • OH) are formed through sulfate radical anions (SO 4 •− ) and act as the ROS for the organic pollutant degradation. In addition, the stability of the catalyst is monitored by various characterization techniques.