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• W4362659572 abstract "In this work, we investigate the influence of H2O2 dosage, H2O2 dosing method, and electron-rich dissolved organic matter (DOM) on the performance of the peroxone (O3/H2O2) process using oxalate (OA) as the target organic compound. Our results show that the method used for H2O2 dosing (i.e., single, multiple, and/or continuous injection(s)) has a significant influence on OA removal after 1 h with nearly 100% of OA oxidized by continuous injection of a total of 1 mM H2O2, but only 48 and 80% OA were removed when the same amount of H2O2 (1 mM) is applied in single and multiple injection(s), respectively. Inhibition of futile scavenging of •OH by H2O2 when H2O2 is dosed in smaller amounts either frequently or continuously throughout the process results in a higher efficiency of organic oxidation compared to that achieved with a single injection of a high concentration of H2O2 at the outset. Our results further show that the presence of high concentrations of humic acids (HA, a representative electron-rich DOM) promotes O3 decay and concomitant •OH generation rates and, as a result, significantly enhances the oxidation rate of OA by ozone alone. As such, any enhancement in •OH generation and associated OA oxidation that might be achieved by H2O2 addition in the presence of HA will be dependent on the extent of •OH generation that results from HA-promoted O3 decay. Based on our results, we have developed a mathematical model that can be used to predict •OH generation and OA oxidation by the peroxone process over a range of conditions. The model provides a good description of the influence of various operating parameters (including ozone dosage, H2O2 dosage, H2O2 dosing method, and the presence of HA) on OA oxidation and, potentially, can be used to optimize the choice of operating conditions in full-scale peroxone systems." @default.
• W4362659572 created "2023-04-07" @default.
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• W4362659572 date "2023-04-06" @default.
• W4362659572 modified "2023-09-30" @default.
• W4362659572 title "Kinetic Modeling-Assisted Optimization of the Peroxone (O₃/H₂O₂) Water Treatment Process" @default.
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• W4362659572 doi "https://doi.org/10.1021/acs.iecr.3c00020" @default.
• W4362659572 hasPublicationYear "2023" @default.
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