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Peracetic Acid Enhances Micropollutant Degradation by Ferrate(VI) through Promotion of Electron Transfer Efficiency.
Environ Sci Technol. 2022 08 16; 56(16):11683-11693.ES

Abstract

Ferrate(VI) and peracetic acid (PAA) are two oxidants of growing importance in water treatment. Recently, our group found that simultaneous application of ferrate(VI) and PAA led to much faster degradation of micropollutants compared to that by a single oxidant, and this paper systematically evaluated the underlying mechanisms. First, we used benzoic acid and methyl phenyl sulfoxide as probe compounds and concluded that Fe(IV)/Fe(V) was the main reactive species, while organic radicals [CH3C(O)O•/CH3C(O)OO•] had negligible contribution. Second, we removed the coexistent hydrogen peroxide (H2O2) in PAA stock solution with free chlorine and, to our surprise, found the second-order reaction rate constant between ferrate(VI) and PAA to be only about 1.44 ± 0.12 M-1s-1 while that of H2O2 was as high as (2.01 ± 0.12) × 101 M-1s-1 at pH 9.0. Finally, further experiments on ferrate(VI)-bisulfite and ferrate(VI)-2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic)acid systems confirmed that PAA was not an activator for ferrate(VI). Rather, PAA could enhance the oxidation capacity of Fe(IV)/Fe(V), making their oxidation outcompete self-decay. This study, for the first time, reveals the ability of PAA to promote electron transfer efficiency between high-valent metals and organic contaminants and confirms the benefits of co-application of ferrate(VI) and PAA for alkaline wastewater treatment.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Wang J
School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States.
Kim J
School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States.
Ashley DC
Department of Chemistry and Biochemistry, Spelman College, Atlanta, Georgia 30314, United States.
Sharma VK
Department of Environment and Occupational Health, School of Public Health, Texas A&M University, College Station, Texas 77843, United States.
Huang CH
School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States.

MeSH

ElectronsHydrogen PeroxideIronOxidantsOxidation-ReductionPeracetic AcidWater Pollutants, ChemicalWater Purification

Pub Type(s)

Journal Article
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

35880779

Citation

Wang, Junyue, et al. "Peracetic Acid Enhances Micropollutant Degradation By Ferrate(VI) Through Promotion of Electron Transfer Efficiency." Environmental Science & Technology, vol. 56, no. 16, 2022, pp. 11683-11693.
Wang J, Kim J, Ashley DC, et al. Peracetic Acid Enhances Micropollutant Degradation by Ferrate(VI) through Promotion of Electron Transfer Efficiency. Environ Sci Technol. 2022;56(16):11683-11693.
Wang, J., Kim, J., Ashley, D. C., Sharma, V. K., & Huang, C. H. (2022). Peracetic Acid Enhances Micropollutant Degradation by Ferrate(VI) through Promotion of Electron Transfer Efficiency. Environmental Science & Technology, 56(16), 11683-11693. https://doi.org/10.1021/acs.est.2c02381
Wang J, et al. Peracetic Acid Enhances Micropollutant Degradation By Ferrate(VI) Through Promotion of Electron Transfer Efficiency. Environ Sci Technol. 2022 08 16;56(16):11683-11693. PubMed PMID: 35880779.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Peracetic Acid Enhances Micropollutant Degradation by Ferrate(VI) through Promotion of Electron Transfer Efficiency. AU - Wang,Junyue, AU - Kim,Juhee, AU - Ashley,Daniel C, AU - Sharma,Virender K, AU - Huang,Ching-Hua, Y1 - 2022/07/26/ PY - 2022/7/27/pubmed PY - 2022/8/18/medline PY - 2022/7/26/entrez KW - Fe(IV)/Fe(V) KW - advanced oxidation KW - ferrate(VI) KW - multi-oxidant system KW - peracetic acid KW - water treatment SP - 11683 EP - 11693 JF - Environmental science & technology JO - Environ Sci Technol VL - 56 IS - 16 N2 - Ferrate(VI) and peracetic acid (PAA) are two oxidants of growing importance in water treatment. Recently, our group found that simultaneous application of ferrate(VI) and PAA led to much faster degradation of micropollutants compared to that by a single oxidant, and this paper systematically evaluated the underlying mechanisms. First, we used benzoic acid and methyl phenyl sulfoxide as probe compounds and concluded that Fe(IV)/Fe(V) was the main reactive species, while organic radicals [CH3C(O)O•/CH3C(O)OO•] had negligible contribution. Second, we removed the coexistent hydrogen peroxide (H2O2) in PAA stock solution with free chlorine and, to our surprise, found the second-order reaction rate constant between ferrate(VI) and PAA to be only about 1.44 ± 0.12 M-1s-1 while that of H2O2 was as high as (2.01 ± 0.12) × 101 M-1s-1 at pH 9.0. Finally, further experiments on ferrate(VI)-bisulfite and ferrate(VI)-2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic)acid systems confirmed that PAA was not an activator for ferrate(VI). Rather, PAA could enhance the oxidation capacity of Fe(IV)/Fe(V), making their oxidation outcompete self-decay. This study, for the first time, reveals the ability of PAA to promote electron transfer efficiency between high-valent metals and organic contaminants and confirms the benefits of co-application of ferrate(VI) and PAA for alkaline wastewater treatment. SN - 1520-5851 UR - https://www.unboundmedicine.com/medline/citation/35880779/Peracetic_Acid_Enhances_Micropollutant_Degradation_by_Ferrate_VI__through_Promotion_of_Electron_Transfer_Efficiency_ DB - PRIME DP - Unbound Medicine ER -