Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 25, issue 21
Articles | Volume 25, issue 21
https://doi.org/10.5194/acp-25-14629-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-25-14629-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 25, issue 21
Research article
 | 
04 Nov 2025
Research article |  | 04 Nov 2025

Composition and Formation Mechanism of Brown Carbon: Identification and Quantification of Phenolic Precursors

Md. Al-Amin Hossen, Mehedi Hasan Shakil, Md. Fahim Ehasan, Abu Rayhan Mohammad Tareq, and Abdus Salam

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Short summary
This study provides comprehensive insights into the compositions, surface elements, and formation mechanism of BrC in the atmosphere of Dhaka, Bangladesh, through the identification and quantification of seven key phenolic precursors and a laboratory-based aqueous-phase nitration experiment. We observed that PM2.5 particles predominantly exhibited spherical, irregular, and chain-like morphologies, with carbonaceous species, minerals, and trace elements.
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