Chemical transformation of a long-chain alkyl organosulfate <i>via</i> heterogeneous OH oxidation: a case study of sodium dodecyl sulfate

Ng, Sze In Madeleine; Ng, Kwan Hung; Yeung, Pui Wo Felix; Xu, Rongshuang; So, Pui‐Kin; Huang, Yuanlong; Wang, Yuchen; Choi, Chun Kit K.; Tse, Ying-Lung Steve; Chan, Man Nin

doi:10.1039/d2ea00026a

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Cited by 2 publications

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“…16 After formation, organosulfates can be further transformed and shorter chain length alkylsulfates may be formed through fragmentation processes. 20 Although global inorganic sulfate emissions are set to decrease, the fraction of total sulfate in the organosulfate form is predicted to increase. 3,21 Therefore, it is important to identify the impacts of organosulfate aerosol on climate.…”

Section: Introductionmentioning

confidence: 99%

Physical properties of short chain aqueous organosulfate aerosol

Bain

Chan

Bzdek

2023

Environ. Sci.: Atmos.

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Section: Introductionmentioning

confidence: 99%

Physical properties of short chain aqueous organosulfate aerosol

Bain

Chan

Bzdek

2023

Environ. Sci.: Atmos.

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Formation of Inorganic Sulfate and Volatile Nonsulfated Products from Heterogeneous Hydroxyl Radical Oxidation of 2-Methyltetrol Sulfate Aerosols: Mechanisms and Atmospheric Implications

Xu,

Chen,

et al. 2024

Environ. Sci. Technol. Lett.

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Chemical transformation of 2-methyltetrol sulfates (2-MTS), key isoprene-derived secondary organic aerosol (SOA) constituents, through heterogeneous hydroxyl radical (•OH) oxidation can result in the formation of previously unidentified atmospheric organosulfates (OSs). However, detected OSs cannot fully account for the sulfur content released from reacted 2-MTS, indicating the existence of sulfur in forms other than OSs such as inorganic sulfates. This work investigated the formation of inorganic sulfates through heterogeneous •OH oxidation of 2-MTS aerosols. Remarkably, high yields of inorganic sulfates, defined as the moles of inorganic sulfates produced per mole of reacted 2-MTS, were observed in the range from 0.48 ± 0.07 to 0.68 ± 0.07. These could be explained by the production of sulfate (SO4 •–) and sulfite (SO3 •–) radicals through the cleavage of C–O(S) and (C)O–S bonds, followed by aerosol-phase reactions. Additionally, nonsulfated products resulting from bond cleavage were likely volatile and evaporated into the gas phase, as evidenced by the observed aerosol mass loss (≤25%) and concurrent size reduction upon oxidation. This investigation highlights the significant transformation of sulfur from its organic to inorganic forms during the heterogeneous oxidation of 2-MTS aerosols, potentially influencing the physicochemical properties and environmental impacts of isoprene-derived SOAs.

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Chemical transformation of a long-chain alkyl organosulfate via heterogeneous OH oxidation: a case study of sodium dodecyl sulfate

Abstract: Organosulfates (OS) are regarded as stable tracers for secondary organic aerosols. However, recent studies have reported their potential chemical instability, dependent on their structures. In this study, we aim to...

Cited by 2 publications

References 116 publications

Physical properties of short chain aqueous organosulfate aerosol

Physical properties of short chain aqueous organosulfate aerosol

Formation of Inorganic Sulfate and Volatile Nonsulfated Products from Heterogeneous Hydroxyl Radical Oxidation of 2-Methyltetrol Sulfate Aerosols: Mechanisms and Atmospheric Implications

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