Alternate identifier:
-
Related identifier:
-
Creator/Author:
Jiang, Feng https://orcid.org/0000-0003-1399-5353 [Aerosolforschung]

Siemens, Kyla [Siemens, Kyla]

Linke, Claudia [Aerosolforschung]

Li, Yanxia [Aerosolforschung]

Gong, Yiwei [Aerosolforschung]

Leisner, Thomas https://orcid.org/0000-0001-9693-7671 [Aerosolforschung]

Laskin, A. [Laskin, A.]

Saathoff, Harald https://orcid.org/0000-0002-1301-8010 [Aerosolforschung]
Contributors:
-
Title:
Molecular Analysis of Secondary Organic Aerosol and Brown Carbon from the Oxidation of Indole
Additional titles:
-
Description:
(Abstract) Indole (ind) is a nitrogen-containing heterocyclic volatile organic compound commonly emitted from animal husbandry and from different plants like maize with global emissions of 0.1 Tg y-1. The chemical composition and optical properties of indole secondary organic aerosol (SOA) and brown carbon (BrC) are still not well understood. To address this, environmental chamber experiments were conducted to investigate the oxidation of indole at atmospherically relevant concentrations of selected oxidants (OH radicals and O3) with/without NO2. In the presence of NO2, the SOA yields decreased by more than a factor of two but the mass absorption coefficient at 365 nm (MAC365) of ind-SOA was 4.3 ± 0.4 m2 g-1, which was 5 times higher than that in experiments without NO2. In the presence of NO2, C8H6N2O2 (identified as 3-nitroindole) contributed 76 % to the all organic compounds detected by a chemical ionization mass spectrometer, contributing ~50 % of the light absorption at 365 nm (Abs365). In the absence of NO2, the dominating chromophore was C8H7O3N contributing to 20–30 % of Abs365. Indole contributes substantially to the formation of secondary BrC and its potential impact on the atmospheric radiative transfer is further enhanced in the presence of NO2, as it significantly increases the specific light absorption of ind-SOA by facilitating the formation of 3-nitroindole. This work provides new insights into an important process of brown carbon formation by interaction of two pollutants, NO2 and indole, mainly emitted by anthropogenic activities.
(Abstract) Indole (ind) is a nitrogen-containing heterocyclic volatile organic compound commonly emitted from animal husbandry and from different plants like maize with global emissions of 0.1 Tg y-1. The chemical composition and optical properties of indole secondary organic aerosol (SOA) and brown carbon (BrC) are still not well understood. To address this, environmental chamber experiments were conducted to investigate the oxidation of indole at atmospherically relevant concentrations of selected oxidants (OH radicals and O3) with/without NO2. In the presence of NO2, the SOA yields decreased by more than a factor of two but the mass absorption coefficient at 365 nm (MAC365) of ind-SOA was 4.3 ± 0.4 m2 g-1, which was 5 times higher than that in experiments without NO2. In the presence of NO2, C8H6N2O2 (identified as 3-nitroindole) contributed 76 % to the all organic compounds detected by a chemical ionization mass spectrometer, contributing ~50 % of the light absorption at 365 nm (Abs365). In the absence of NO2, the dominating chromophore was C8H7O3N contributing to 20–30 % of Abs365. Indole contributes substantially to the formation of secondary BrC and its potential impact on the atmospheric radiative transfer is further enhanced in the presence of NO2, as it significantly increases the specific light absorption of ind-SOA by facilitating the formation of 3-nitroindole. This work provides new insights into an important process of brown carbon formation by interaction of two pollutants, NO2 and indole, mainly emitted by anthropogenic activities.
(Technical Remarks) This data is related to the publication "Molecular Analysis of Secondary Organic Aerosol and Brown Carbon from the Oxidation of Indole" by Jiang et al., 2024 in Atmospheric Chemistry and Physics.
Keywords:
Secondary aerosol
brown carbon
Indole
Related information:
-
Language:
-
Production year:
Subject areas:
Geological Science
Resource type:
Dataset
Data source:
-
Software used:
-
Data processing:
-
Publication year:
Rights holders:

Siemens, Kyla

Linke, Claudia

Li, Yanxia

Gong, Yiwei

Laskin, A.
Funding:
-
Name Storage Metadata Upload Action

Number of views in the previous six months.

Dataset page views

298


Downloads

0


Overall statistics

Period Landing page accessed Dataset downloaded
Jul 2024 35 0
Jun 2024 31 0
May 2024 82 0
Apr 2024 48 0
Mar 2024 36 0
Feb 2024 66 0
Before 15 0
Total 313 0
Status:
Published
Uploaded by:
kitopen
Created on:
Archiving date:
2024-01-30
Archive size:
2.3 MB
Archive creator:
kitopen
Archive checksum:
cc479cbe1e3d41cc44b3bf9905587818 (MD5)
Embargo end date:
-