What does this research mean for the field?

Emitted SO2 experiences systematic 34S depletion relative to fuels due to isotopic fractionation during combustion and flue gas desulfurization, which must be accounted for in accurate atmospheric source apportionment. Novelty: ClaimNovelty.METHODOLOGICAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To develop an isotope-enabled chemical transport model that captures progressive sulfur isotopic evolution in open atmospheric systems to accurately constrain sulfur sources and chemistry.

August 22, 2026Atmospheric chemistry and physicsOpen Access

Advancing isotope-enabled model for comprehensive understanding of atmospheric sulfur isotope effects: demonstrating the overlooked isotopic fractionation during combustion and flue gas desulfurization

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Authors

LWLianfang WeiChinese Academy of Sciences XCXueshun ChenChinese Academy of Sciences WYWenyi YangGreenhouse Gas Industries (United States)

Discussion

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Overview

Atmospheric modeling study demonstrates sulfur isotope fractionation during combustion and flue gas desulfurization, highlighting mechanisms for accurate sulfur budget constraints.

Key Points

To develop an isotope-enabled chemical transport model that captures progressive sulfur isotopic evolution in open atmospheric systems to accurately constrain sulfur sources and chemistry.
Constructed an isotope-enabled chemical transport model (CTM) tracking four sulfur isotopologues (32SO2, 34SO2, 32SO42−, and 34SO42−) through emissions, transport, chemistry, and deposition.
Implemented an iterative time-splitting method to minimize numerical bias from applying the Rayleigh equation in open atmospheric conditions.
Reproduced 34S enrichment of sulfate relative to SO2 across eastern China, simulating a Δδ34S_SO42−/SO2 of 6.11 ‰ ± 1.85 ‰ compared to the observed 3.43 ‰ ± 1.11 ‰.
Identified systematic 34S depletion in emitted SO2 relative to source coals (δ34S = 1 ‰–10 ‰), confirming isotopic fractionation during combustion and flue gas desulfurization.

Cite This Study

Wei et al. (2026) studied this question.

synapsesocial.com/papers/6a895f74ca7ade938187e121 https://doi.org/10.5194/acp-26-11667-2026

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August 22, 2026Atmospheric chemistry and physicsOpen Access

Advancing isotope-enabled model for comprehensive understanding of atmospheric sulfur isotope effects: demonstrating the overlooked isotopic fractionation during combustion and flue gas desulfurization

View Full Paper

Ask AI

Bookmark

Authors

LWLianfang WeiChinese Academy of Sciences XCXueshun ChenChinese Academy of Sciences WYWenyi YangGreenhouse Gas Industries (United States)

Discussion

Member takes

Overview

Atmospheric modeling study demonstrates sulfur isotope fractionation during combustion and flue gas desulfurization, highlighting mechanisms for accurate sulfur budget constraints.

Key Points

To develop an isotope-enabled chemical transport model that captures progressive sulfur isotopic evolution in open atmospheric systems to accurately constrain sulfur sources and chemistry.
Constructed an isotope-enabled chemical transport model (CTM) tracking four sulfur isotopologues (32SO2, 34SO2, 32SO42−, and 34SO42−) through emissions, transport, chemistry, and deposition.
Implemented an iterative time-splitting method to minimize numerical bias from applying the Rayleigh equation in open atmospheric conditions.
Reproduced 34S enrichment of sulfate relative to SO2 across eastern China, simulating a Δδ34S_SO42−/SO2 of 6.11 ‰ ± 1.85 ‰ compared to the observed 3.43 ‰ ± 1.11 ‰.
Identified systematic 34S depletion in emitted SO2 relative to source coals (δ34S = 1 ‰–10 ‰), confirming isotopic fractionation during combustion and flue gas desulfurization.

Cite This Study

Wei et al. (2026) studied this question.

synapsesocial.com/papers/6a895f74ca7ade938187e121 https://doi.org/10.5194/acp-26-11667-2026

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