Mixing state and influence factors controlling diurnal variation of particulate nitrophenol compounds at a suburban area in northern China DOI

Ziyong Guo,

Xiao Hu, Wei Sun

et al.

Environmental Pollution, Journal Year: 2024, Volume and Issue: 344, P. 123368 - 123368

Published: Jan. 19, 2024

Language: Английский

Molecular composition of secondary brown carbon from styrene at low-to-high oxidation degrees DOI

Shan Zhang,

Kun Li, Xiaowen Chen

et al.

Environmental Pollution, Journal Year: 2025, Volume and Issue: 368, P. 125795 - 125795

Published: Feb. 3, 2025

Language: Английский

Citations

0
Seasonal Trends and Site Differences of Nitroaromatic Compounds in PM2.5 in Sichuan Basin and Their Effects on Light Absorption of Brown Carbon DOI Creative Commons

Tian Tang,

Buyi Xu,

Hongli Tao

et al.

Toxics, Journal Year: 2025, Volume and Issue: 13(2), P. 124 - 124

Published: Feb. 6, 2025

Nitroaromatic compounds (NACs) have adverse effects on human health and climate. Daily PM2.5 samples were collected in winter summer of 2022 two cities, Chengdu (CD) Mianyang (MY), located Sichuan Basin southwestern China. Four types NACs PM2.5, containing nitrophenols, nitrocatechols, nitrosalicylic acids, nitronaphthol, analyzed. The mean concentration a total 10 (ΣNACs) at the suburban MY site (71.7 ± 35.6 ng m−3) was higher than that urban CD (29.5 16.2 m−3), while summer, concentrations ΣNACs cities similar, around 2.2 m−3. much attributed to impact biomass burning. 4-Nitrocatechol (4NC) most abundant species during sampling period, accounting for 35–56% mass. In winter, light absorption coefficient methanol-soluble brown carbon (Abs365,M) 10.5 3.4 13.6 4.3 Mm−1 MY, respectively, which about 4–7 times summer. contributions 365 nm Abs365,M 1.6–3.6% 0.5–0.7% with 4NC contributing among all NACs. geographical origins potential sources both sites mainly distributed within basin.

Language: Английский

Citations

0
Oxidized Nitrogen‐Containing Organic Compounds Formation Enhanced the Light Absorption of PM2.5 Brown Carbon DOI Creative Commons

Diwei Wang,

Zhenxing Shen,

Gezi Bai

et al.

Journal of Geophysical Research Atmospheres, Journal Year: 2025, Volume and Issue: 130(3)

Published: Feb. 6, 2025

Abstract Brown carbon (BrC) is known to have a great impact on atmospheric radiative forcing, but its absorption characteristics at the molecular level not well understood. This study investigated seasonal variations of light and composition BrC in Xi'an, China. Results showed that exhibited higher capacity cold (autumn winter) than warm seasons (spring summer). Nitrogen‐containing organic compounds were identified as important chromophores. Oxidized‐N originated from biomass burning emissions NO x /NO 3 − mediated oxidation reactions predominant seasons, whereas reduced‐N mainly formed NH /NH 4 + abundant seasons. These results contribute better understanding formation mechanisms nitrogen‐containing chromophores PM 2.5 .

Language: Английский

Citations

0
Size-segregated nitrated aromatic compounds in PM10 and potential health risks in Guangzhou, south China DOI
Le Fang, Runqi Zhang, Sheng Li

et al.

Atmospheric Environment, Journal Year: 2025, Volume and Issue: unknown, P. 121145 - 121145

Published: March 1, 2025

Language: Английский

Citations

0
(Het)aryl-substituted monoazatriphenylenes as luminescent “turn-off” chemosensors for nitroaromatic compounds with internal filter effect correction DOI

K. Suganthi,

Albert F. Khasanov,

Shendrikova T.I

et al.

Optical Materials, Journal Year: 2025, Volume and Issue: unknown, P. 116949 - 116949

Published: March 1, 2025

Language: Английский

Citations

0
Unveiling the origins of Northern Thailand’s haze: comprehensive chemical characterization and source apportionment of PM2.5 using targeted molecular markers DOI Creative Commons
Supattarachai Saksakulkrai, Somporn Chantara,

Pavidarin Kraisitnitikul

et al.

Journal of Environmental Sciences, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Language: Английский

Citations

0
The importance of burning conditions on the composition of domestic biomass-burning organic aerosol and the impact of atmospheric ageing DOI Creative Commons
R. Evans, Daniel J. Bryant, Aristeidis Voliotis

et al.

Atmospheric chemistry and physics, Journal Year: 2025, Volume and Issue: 25(8), P. 4367 - 4389

Published: April 22, 2025

Abstract. Domestic biomass burning is a significant source of organic aerosol (OA) to the atmosphere; however, understanding OA composition under different conditions and after oxidation largely unknown. Compositional analysis often limited by lack analytical standards available for quantification; semi-quantitative non-target (NTA) can overcome these limitations enabling detection thousands compounds quantification via surrogate standards. A series controlled-burn experiments were conducted at Manchester Aerosol Chamber investigate domestic biomass-burning (BBOA) impact atmospheric ageing. Insights into chemical fresh aged from flaming-dominated smouldering-dominated combustion obtained newly developed NTA approach using ultra-high-performance liquid chromatography high-resolution mass spectrometry. burns contained carbon content, whereas it was primarily black carbon. The detectable both dominated oxygenated (CHO) (≈ 90 %) with smaller contributions organonitrogen species. Primary (POA) had high concentration C8–C17CHO compounds, exhibiting peak between C8–C11. However, POA exhibited greater contribution C13–C17 CHO More than 50 % in determined as aromatic aromaticity index, form functionalised monoaromatic compounds. After ageing, total decreased loss smouldering (−53 flaming (−16 due increased reduction polyaromatic conditions. O:C ratios consistent those (0.57–1.00), suggesting that compositional changes upon ageing driven aromaticity. there probability ≥ 0.8 OA, indicating presence more oxidised This study presents first reported quantitative BBOA retention window scaling demonstrates burn phase may have important consequences exposure such emissions residential settings.

Language: Английский

Citations

0
Melamine-participant hydrogen-bonded organic frameworks with strong hydrogen bonds and hierarchical micropores driving extraction of nitroaromatic compounds DOI

Yalan Hu,

Yuefan Liu,

Yixin Kuang

et al.

Analytica Chimica Acta, Journal Year: 2023, Volume and Issue: 1277, P. 341652 - 341652

Published: July 26, 2023

Language: Английский

Citations

9
Molecular characterization of nontarget brominated disinfection byproducts formed during the ozonation in the presence of bromide and ammonium and their potential toxicity implications DOI
Yao Lu, Bei Ye,

De-Xiu Wu

et al.

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 498, P. 155116 - 155116

Published: Aug. 24, 2024

Language: Английский

Citations

3
Molecular characterization of atmospheric organic aerosols in typical megacities in China DOI Creative Commons
Miaomiao Zhang, Dongmei Cai,

Jingxin Lin

et al.

npj Climate and Atmospheric Science, Journal Year: 2024, Volume and Issue: 7(1)

Published: Oct. 1, 2024

Language: Английский

Citations

3