pH regulates the formation of organosulfates and inorganic sulfate from organic peroxide reaction with dissolved SO<sub>2</sub> in aquatic media
Abstract 2. Results show that due to the presence of the hydroperoxyl group in their structures, MHP and PAA are susceptible to forming inorganic sulfate and organosulfate (methyl sulfate for MHP and acetyl sulfate for PAA) depending on the pH, while BZP exclusively forms organosulfate (benzoyl sulfate) in the pH range investigated. Moreover, it is seen that the ability of PAA to form inorganic sulfate relative to organosulfate is more pronounced, which is supported by a previous experimental observation. The effective rate constants of the transformation of these peroxides within the pH 1–10 and 240–340 K ranges exhibit positive pH and temperature dependencies, and BZP is seen to degrade more effectively than MHP and PAA. In addition to the pH impact, it is highlighted that the formation of organic and/or inorganic sulfate strongly depends on the nature of the substituents on the peroxy function. Namely, PAA and BZP are more reactive than MHP, which may be attributed to the electron-withdrawing effects of -C (O) R (R = 3 and -C6 H5 for PAA and BZP, respectively) substituents that activate the peroxy function. The results further indicate that the aqueous-phase degradation of OPs can adequately drive the change in the chemical composition of DOM, both in terms of organic and inorganic sulfate mass fractions.
- Standort
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Deutsche Nationalbibliothek Frankfurt am Main
- Umfang
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Online-Ressource
- Sprache
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Englisch
- Erschienen in
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pH regulates the formation of organosulfates and inorganic sulfate from organic peroxide reaction with dissolved SO2 in aquatic media ; volume:24 ; number:3 ; year:2024 ; pages:1841-1853 ; extent:13
Atmospheric chemistry and physics ; 24, Heft 3 (2024), 1841-1853 (gesamt 13)
- Urheber
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Du, Lin
Lv, Xiaofan
Lily, Makroni
Li, Kun
Tsona Tchinda, Narcisse
- DOI
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10.5194/acp-24-1841-2024
- URN
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urn:nbn:de:101:1-2024021503351857058080
- Rechteinformation
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Letzte Aktualisierung
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15.08.2025, 07:26 MESZ
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Beteiligte
- Du, Lin
- Lv, Xiaofan
- Lily, Makroni
- Li, Kun
- Tsona Tchinda, Narcisse
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