Comparison of water-soluble and insoluble organic compositions attributing to different light absorption efficiency between residential coal and biomass burning emissions DOI Creative Commons
Lu Zhang, Jin Li, Yaojie Li

et al.

Published: Nov. 13, 2023

Abstract. There are growing concerns about the climate impacts of absorbing organic carbon (also known as Brown Carbon, BrC) in environment, however, chemical composition and association with light absorption ability BrC remain poorly understood. In this study, focusing on one major source BrC, water-soluble water-insoluble (WSOC; WISOC) from residential solid fuel combustions were characterized at molecular level, evaluated for their quantitative relationship mass efficiency (MAE). The MAE values λ=365 nm biomass burning significantly higher than coal combustion smokes. Thousands peaks identified m/z range 150–800, most intense ion 200–500 WSOC 600–800 WISOC, respectively. CHO group was abundant component extracts emissions compared to coals; while sulfur-containing compounds (CHOS+CHONS, SOCs) more WISOC extracts, especially emissions. Emissions CHON positively correlated N content (r=0.936, p<0.05), which explained SOCs predominant flaming phases, seen a positive correlation between modified (MCE) (r=0.750, p<0.05). unique formulas aerosols lower H/C O/C regions unsaturated van Krevelen (VK) diagram. had high fractions condensed aromatics (32–59 %) only 4.3–9.7 % CHOS by larger aromatic compound combustion. values, both (r=0.714, p<0.05) (r=0.929, p<0.001), suggesting abundance variabilities across different fuels.

Language: Английский

Real-Time Emission, Chemical Properties, and Dynamic Evolution Mechanism of Volatile Organic Compounds during Co-Pyrolysis of Rice Straw and Semi-Bituminous Coal DOI
Tingting Li, Fanhao Song, Yingchen Bai

et al.

ACS ES&T Engineering, Journal Year: 2023, Volume and Issue: 3(5), P. 690 - 705

Published: Jan. 5, 2023

The co-pyrolysis of biomass–coal blends improves energy utilization efficiency; however, the synergistic mechanisms behind thermal degradation and volatile formation remain unclear. We combined online thermogravimetry–Fourier transform infrared spectrometry–gas chromatography/mass spectrometry (TG–FTIR–GC/MS), Gaussian deconvolution, two-dimensional correlation (2D-COS) to reveal component degradation, sequential response, evolution mechanism volatiles during rice straw (RS) semi-bituminous coal (SBC), which were mixed in three proportions 1:3, 1:1, 3:1. activation energies (24.70–53.43 kJ mol–1) preexponential factors (44.67–7663.43 min–1) for decomposition average emission intensity coefficient (EIC) (0.06–0.12) exhibited significant heterogeneity highly dependent on pyrolysis temperature blend proportion. EIC values phenols/esters, alcohols/ethers, ketones, aldehydes, acids increased with increasing RS distribution high SBC was mainly located decarbonylation/dehydration reaction region. Moreover, organic compound (VOC) intermediate VOC percentages 59–83 17–39%, respectively, N-containing species contributing most fraction. Most reducing character, carbon oxidation state below zero. An increase proportion contributed unsaturation small skeletons volatiles, respectively. Notably, primary response hydrocarbons, alcohols/phenols/ethers/esters, (aldehydes/ketones/acids, aromatics), that order. Furthermore, we proposed a novel demonstrate heterogeneous RS/SBC components significantly dynamic process. These insights into are useful optimization pollution control.

Language: Английский

Citations

7
Removing barriers to clean cooking programs in Latin America DOI

Pauline Ravillard,

Enrique Chueca,

Mariana Weiss

et al.

Energy Sustainable Development/Energy for sustainable development, Journal Year: 2023, Volume and Issue: 73, P. 247 - 262

Published: March 1, 2023

Language: Английский

Citations

6
Emissions of Particulate and Previously Ignored Gaseous Phosphorus from Coal and Biomass Combustion in Household Stoves DOI
Jing Xu, Guofeng Shen, Bo Fu

et al.

Environmental Science & Technology Letters, Journal Year: 2023, Volume and Issue: 10(11), P. 1011 - 1016

Published: Feb. 4, 2023

The biogeochemistry of phosphorus (P) strongly affects the primary productivity terrestrial and ocean ecosystems. However, global P budget is imbalanced, lack experimental evidence-based emissions from combustion sources one important reason for this imbalance. Here, we evaluated in both particulate gaseous phases assessed mass balance (MB) to verify reliability emission factors (EFs) measured directly burning biomass coal. EFs released into air coal ranged 31.5 337.4 μg/g, with 8.4%–63.4% present phase, while burning, 63.2 866.5 2.1%–69.5% as P. MB results indicated that nearly half fuel was emitted air, but fraction varied 10% 83% different fuels. modified efficiency (MCE) not significantly correlated total previously ignored first time, study provides evidence reporting a P, which reducing uncertainties imbalanced budget.

Language: Английский

Citations

4
Source Profiles of Particle‐Bound Phenolic Compounds and Aromatic Acids From Fresh and Aged Solid Fuel Combustion: Implication for the Aging Mechanism and Newly Proposed Source Tracers DOI
Bin Zhang, Zhenxing Shen, Kun He

et al.

Journal of Geophysical Research Atmospheres, Journal Year: 2023, Volume and Issue: 128(24)

Published: Dec. 15, 2023

Abstract Phenolic compounds and aromatic acids, as oxygenated compounds, can participate in photochemical reactions to form secondary organic aerosols (SOAs), thus strongly impact climate human health. In the present study, on‐site combustion experiments were conducted determine primary emissions formation of phenolic acids released from burning a variety solid fuels using potential aerosol mass‐oxidation flow reactor (PAM‐OFR). Emission factors (EFs) aged samples 1.04 4.04 0.90 2.80 times those fresh PM 2.5 , respectively, implying significant amounts these produced atmospheric aging processes. Substantially different emission profiles observed between coal biomass burning, with mainly single‐ring species (82%–86% 86%–89% emissions), while more two‐, three‐, four‐ring (59%–69% 50%–58% emissions). Aromatic also differed considerably, producing significantly higher (>2 times) abundance dibasic than combustion, suggesting additional ‐COOH group burning. Benzenediol, cresol, dimethylphenol, 1‐pyrenol, phenanthrenol, hydroxylbenzonic acid identified SOA they formed during simulated Benzenediol acid/phenanthrenol was much lower (3.70 ± 1.29) (62.7 9.61), values remained stable after aging, this ratio being suitable tracer for distinguishing source apportionment analysis.

Language: Английский

Citations

4
Characterization of atmospheric nitroaromatic compounds in Southwest China by direct injection liquid chromatography-tandem mass spectrometry analysis of aerosol extracts DOI

Hongli Tao,

Tian Tang,

Huanbo Wang

et al.

Chemosphere, Journal Year: 2024, Volume and Issue: 363, P. 142845 - 142845

Published: July 14, 2024

Language: Английский

Citations

1
Cytotoxicity and Epithelial Barrier Toxicity of Fine Particles from Residential Biomass Pellet Burning DOI Creative Commons
Yucai Chen, Lu Zhang, Yue Wu

et al.

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 30, 2024

Rising environmental concerns associated with the domestic use of solid biofuels have driven search for clean energy alternatives. This study investigated

Language: Английский

Citations

1
Comment on egusphere-2023-2417 DOI Creative Commons
Lu Zhang, Jin Li, Yaojie Li

et al.

Published: April 12, 2024

Abstract. There are growing concerns about the climate impacts of absorbing organic carbon (also known as Brown Carbon, BrC) in environment, however, chemical composition and association with light absorption ability BrC remain poorly understood. In this study, focusing on one major source BrC, water-soluble water-insoluble (WSOC; WISOC) from residential solid fuel combustions were characterized at molecular level, evaluated for their quantitative relationship mass efficiency (MAE). The MAE values λ=365 nm biomass burning significantly higher than coal combustion smokes. Thousands peaks identified m/z range 150–800, most intense ion 200–500 WSOC 600–800 WISOC, respectively. CHO group was abundant component extracts emissions compared to coals; while sulfur-containing compounds (CHOS+CHONS, SOCs) more WISOC extracts, especially emissions. Emissions CHON positively correlated N content (r=0.936, p<0.05), which explained SOCs predominant flaming phases, seen a positive correlation between modified (MCE) (r=0.750, p<0.05). unique formulas aerosols lower H/C O/C regions unsaturated van Krevelen (VK) diagram. had high fractions condensed aromatics (32–59 %) only 4.3–9.7 % CHOS by larger aromatic compound combustion. values, both (r=0.714, p<0.05) (r=0.929, p<0.001), suggesting abundance variabilities across different fuels.

Language: Английский

Citations

0
Reply on RC1 DOI Creative Commons

Lu Zhang

Published: April 16, 2024

Abstract. There are growing concerns about the climate impacts of absorbing organic carbon (also known as Brown Carbon, BrC) in environment, however, chemical composition and association with light absorption ability BrC remain poorly understood. In this study, focusing on one major source BrC, water-soluble water-insoluble (WSOC; WISOC) from residential solid fuel combustions were characterized at molecular level, evaluated for their quantitative relationship mass efficiency (MAE). The MAE values λ=365 nm biomass burning significantly higher than coal combustion smokes. Thousands peaks identified m/z range 150–800, most intense ion 200–500 WSOC 600–800 WISOC, respectively. CHO group was abundant component extracts emissions compared to coals; while sulfur-containing compounds (CHOS+CHONS, SOCs) more WISOC extracts, especially emissions. Emissions CHON positively correlated N content (r=0.936, p<0.05), which explained SOCs predominant flaming phases, seen a positive correlation between modified (MCE) (r=0.750, p<0.05). unique formulas aerosols lower H/C O/C regions unsaturated van Krevelen (VK) diagram. had high fractions condensed aromatics (32–59 %) only 4.3–9.7 % CHOS by larger aromatic compound combustion. values, both (r=0.714, p<0.05) (r=0.929, p<0.001), suggesting abundance variabilities across different fuels.

Language: Английский

Citations

0
Reply on RC2 DOI Creative Commons

Lu Zhang

Published: April 16, 2024

Abstract. There are growing concerns about the climate impacts of absorbing organic carbon (also known as Brown Carbon, BrC) in environment, however, chemical composition and association with light absorption ability BrC remain poorly understood. In this study, focusing on one major source BrC, water-soluble water-insoluble (WSOC; WISOC) from residential solid fuel combustions were characterized at molecular level, evaluated for their quantitative relationship mass efficiency (MAE). The MAE values λ=365 nm biomass burning significantly higher than coal combustion smokes. Thousands peaks identified m/z range 150–800, most intense ion 200–500 WSOC 600–800 WISOC, respectively. CHO group was abundant component extracts emissions compared to coals; while sulfur-containing compounds (CHOS+CHONS, SOCs) more WISOC extracts, especially emissions. Emissions CHON positively correlated N content (r=0.936, p<0.05), which explained SOCs predominant flaming phases, seen a positive correlation between modified (MCE) (r=0.750, p<0.05). unique formulas aerosols lower H/C O/C regions unsaturated van Krevelen (VK) diagram. had high fractions condensed aromatics (32–59 %) only 4.3–9.7 % CHOS by larger aromatic compound combustion. values, both (r=0.714, p<0.05) (r=0.929, p<0.001), suggesting abundance variabilities across different fuels.

Language: Английский

Citations

0
Review of the Mechanisms of Liquid-Phase Transformation of Atmospheric Phenolic Compounds: Implications for Air Quality and Environmental Health DOI Creative Commons

Yuyan Yang,

Xingru Li, Min Cai

et al.

Atmosphere, Journal Year: 2024, Volume and Issue: 15(9), P. 1040 - 1040

Published: Aug. 28, 2024

Phenolic compounds (PhCs) are aromatic with benzene rings that have one or more hydroxyl groups. They found formed in the atmosphere due to various factors such as combustion processes, industrial emissions, oxidation of volatile organic (VOCs), and other photochemical reactions. Due properties relatively high Henry’s law constants moderate/high water solubility, PhCs vulnerable reactions atmospheric liquid phase conditions relative humidity, fog cloudy conditions. can lead formation secondary aerosols (SOAs), which negative effects on human health. Changes optical impact solar radiation absorption scattering, potentially influencing climate. Additionally, may interact constituents, affecting cloud properties, turn climate precipitation patterns. Therefore, monitoring controlling emission is essential. This paper discusses transformation processes atmosphere, including direct conversion phenol, nitrate-induced nitrite-induced reactions, hydroxylation involving triplet excited state organics, also providing a detailed analysis processes. The findings lay theoretical foundation for future control pollutants.

Language: Английский

Citations

0