Dynamics of nanocluster aerosol in the indoor atmosphere during gas cooking

PNAS Nexus, Journal Year: 2024, Volume and Issue: 3(2)

Published: Feb. 1, 2024

Nanocluster aerosol (NCA: particles in the size range of 1-3 nm) are a critically important, yet understudied, class atmospheric particles. NCA efficiently deposit human respiratory system and can translocate to vital organs. Due their high surface area-to-mass ratios, associated with heightened propensity for bioactivity toxicity. Despite health relevance NCA, little is known regarding prevalence indoor environments where people spend majority time. In this study, we quantify formation transformation down 1 nm via high-resolution online nanoparticle measurements during propane gas cooking residential building. We observed substantial pool sub-1.5 atmosphere periods, number concentrations often dominated by newly formed NCA. Indoor emission factors reach up ∼10

Language: Английский

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Atmospheric nanoparticle growth

Reviews of Modern Physics, Journal Year: 2023, Volume and Issue: 95(4)

Published: Nov. 9, 2023

Atmospheric nanoparticles can serve as nuclei for cloud droplets, thereby inducing significant but uncertain effects on the radiative forcing of climate system. This article focuses physicochemical processes that govern growth these particles from formation molecular clusters until reach sizes where they act condensation nuclei. The review describes latest developments in measurement and modeling connects domains to large-scale simulations such Earth system models. authors recommend closer coordination among laboratory studies, atmospheric measurements, understand importance

Language: Английский

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Opinion: A paradigm shift in investigating the general characteristics of atmospheric new particle formation using field observations

Aerosol Research, Journal Year: 2024, Volume and Issue: 2(1), P. 49 - 58

Published: March 27, 2024

Abstract. Atmospheric new particle formation (NPF) and associated production of secondary particulate matter dominate aerosol number concentrations submicron mass loadings in many environments globally. Our recent investigations show that atmospheric NPF produces a significant amount particles on days when no clear event has been observed/identified. Furthermore, it observed different all around the world growth rates nucleation mode vary little, usually much less than measured condensable vapors. It also local clustering, which cases acts as starting point regional (NPF), can be described with intermediate ions at smallest sizes. These observations, together recently developed ranking method, lead us to propose paradigm shift investigations. In this opinion paper, we will summarize traditional approach describing describe an alternative covering both initial growth. The opportunities remaining challenges offered by are discussed.

Language: Английский

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Flame-Free Candles Are Not Pollution-Free: Scented Wax Melts as a Significant Source of Atmospheric Nanoparticles

Environmental Science & Technology Letters, Journal Year: 2025, Volume and Issue: 12(2), P. 175 - 182

Published: Feb. 3, 2025

Scented wax melts are being popularized as a safer, nontoxic alternative to traditional candles and incense for indoor aromatherapy. We performed field measurements in residential test house investigate atmospheric nanoparticle formation from scented melt use. employed high-resolution particle size magnifier-scanning mobility sizer (PSMPS) proton transfer reaction time-of-flight mass spectrometer (PTR-TOF-MS) real-time monitoring of distributions terpene mixing ratios, respectively. Our findings reveal that terpenes released react with ozone (O3) initiate new (NPF) events, resulting significant concentrations (>106 cm–3) comparable those emitted by combustion-based candles, gas stoves, diesel engines, natural engines. show melt-initiated NPF events can result respiratory exposures, tract deposited dose rates similar determined sources. results challenge the perception safer aromatherapy, highlighting need further research on toxicological properties newly formed nanoparticles better understand their environmental health implications.

Language: Английский

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Comprehensive simulations of new particle formation events in Beijing with a cluster dynamics–multicomponent sectional model

Atmospheric chemistry and physics, Journal Year: 2023, Volume and Issue: 23(12), P. 6879 - 6896

Published: June 21, 2023

Abstract. New particle formation (NPF) and growth are a major source of atmospheric fine particles. In polluted urban environments, NPF events frequently observed with characteristics distinct from those in clean environments. Here we simulate Beijing discrete-sectional model that couples cluster dynamics multicomponent growth. the model, new particles formed by sulfuric acid–dimethylamine nucleation, while is driven coagulation condensation acid, its clusters, oxygenated organic molecules (OOMs). A variable simulation domain size space applied to isolate newly preexisting ones, which allows us focus on rather than evolution non-NPF origin. The yields rich set information including time-dependent rates, concentrations, distributions, time- size-specific chemical compositions. These can be compared field observations comprehensively assess simulation–observation agreement. Sensitivity analysis further quantifies how metrics (e.g., survival probability) respond input variations serves as diagnostic tool pinpoint key parameter leads discrepancies. Seven typical were analyzed. We found gaseous precursor concentrations sink inputs, simulations roughly captured distributions; however, simulated rate was insufficient yield number probability, mode diameter. With aid sensitivity analysis, identified under-detected OOMs likely cause for discrepancy, agreement between observation improved after modulated rates adjusting abundance OOMs.

Language: Английский

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Survival probability of new atmospheric particles: closure between theory and measurements from 1.4 to 100 nm

Atmospheric chemistry and physics, Journal Year: 2022, Volume and Issue: 22(22), P. 14571 - 14587

Published: Nov. 16, 2022

Abstract. The survival probability of freshly nucleated particles governs the influences new particle formation (NPF) on atmospheric environments and climate. It characterizes a avoiding being scavenged by coagulation with pre-existing other scavenging processes before successfully grows up to certain diameter. Despite its importance, measuring has been challenging, which limits knowledge in atmosphere results large uncertainties predicting NPF. Here we report proper methods retrieve using measured aerosol size distributions. Using diverse distributions from urban Beijing, Finnish boreal forest, chamber experiment, kinetic simulations, demonstrate that each method is valid for different type distribution, whereas misapplying conventional banana-type NPF events may underestimate probability. these methods, investigate consistency between theoretical against predicted growth rate sink. With case-by-case time- size-resolved analysis long-term measurement data find although both probabilities are sensitive variations, they are, average, consistent growing 1.4 (the cluster size) 100 nm.

Language: Английский

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How the understanding of atmospheric new particle formation has evolved along with the development of measurement and analysis methods

Journal of Aerosol Science, Journal Year: 2024, Volume and Issue: unknown, P. 106494 - 106494

Published: Nov. 1, 2024

Language: Английский

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