Lynn Mazzoleni

Michigan Technological University

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Cláudio Mazzoleni

Michigan Technological University

Swarup China

Environmental Molecular Sciences Laboratory

Paulo Fialho

Institute of Volcanology and Seismology

Simeon Schum

Michigan Technological University

K. Džepina

Paul Scherrer Institute

Barbara Zielińska

Institute of Organic Chemistry

Detlev Helmig

University of Colorado Boulder

Jacques Hueber

Boulder Environmental Sciences and Technology (United States)

Bo Zhang

Chinese Research Academy of Environmental Sciences

R. C. Owen

Environmental Protection Agency

Cooperative Institutions

Michigan Technological University

Pacific Northwest National Laboratory

Desert Research Institute

University of Colorado Boulder

Environmental Molecular Sciences Laboratory

Colorado State University

Cooperative Institute for Research in Environmental Sciences

Leibniz Institute for Tropospheric Research

Centre National de la Recherche Scientifique

University of Washington

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Author response for "Molecular and physical composition of tar balls in wildfire smoke: an investigation with complementary ionisation methods and 15-Tesla FT-ICR mass spectrometry"

Amna Ijaz William Kew Zezhen Cheng Susan Mathai Nurun Nahar Lata

tar (computing)

10.1039/d3ea00085k/v2/response1

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Identification of climate and health relevant atmospheric organic compounds

Lynn Mazzoleni Jeffrey P. LeClair Jeffrey L. Collett

Identification

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Structural elucidation of climate relevant CHNOS compounds in atmospheric organic matter by ultra-high resolution mass spectrometry

Jeffrey L. Collett Jeffrey P. LeClair Lynn Mazzoleni

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Evaluation of fine particulate emission sources during wild/prescribed fire events

Lynn Mazzoleni Barbara Zielińska Eric M. Fujita T. Snorradottir

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Light absorption by polar and non-polar aerosol compounds from laboratory biomass combustion

Deep Sengupta Vera Samburova Chiranjivi Bhattarai Elena Kirillova Lynn Mazzoleni

Abstract. Fresh and atmospherically aged biomass-burning (BB) aerosol mass is mostly comprised of black carbon (BC) and organic carbon (OC) with its light-absorbing fraction – brown carbon (BrC). There is a lack of data on the physical and chemical properties of atmospheric BB aerosols, leading to high uncertainties in estimates of the BB impact on air quality and climate, especially for BrC. The polarity of chemical compounds influences their fate in the atmosphere including wet/dry deposition and chemical and physical processing. So far, most of the attention has been given to the water-soluble (polar) fraction of BrC, while the non-polar BrC fraction has been largely ignored. In the present study, the light absorption properties of polar and non-polar fractions of fresh and aged BB emissions were examined to estimate the contribution of different-polarity organic compounds to the light absorption properties of BB aerosols. In our experiments, four globally and regionally important fuels were burned under flaming and smoldering conditions in DRI’s combustion chamber. To mimic atmospheric oxidation processes (5–7 days), BB emissions were aged using an oxidation flow reactor (OFR). Fresh and OFR-aged BB aerosols were collected on filters and extracted with water and hexane to study absorption properties of polar and non-polar organic species. Spectrophotometric measurements over the 190 to 900 nm wavelength range showed that the non-polar (hexane-soluble) fraction is 2–3 times more absorbing than the polar (water-soluble) fraction. However, an increased absorbance was observed for the water extracts of oxidized/aged emissions while the absorption of the hexane extracts was lower for the aged emissions. Comparing the absorption Ångström Exponent (AAE) values, we observed changes in the light absorption properties of BB aerosols with aging that was dependent on the fuel types. The light absorption by HUmic LIke Substances (HULIS) was found to be higher in fuels characteristic of the southwestern USA. The absorption of the HULIS fraction was lower for OFR-aged BB emissions. Comparison of the light absorption properties of different polarity extracts (water, hexane, HULIS) provides insight into the chemical nature of BB BrC and its transformation during oxidation processes.

Chemical polarity

Absorbance

Fraction (chemistry)

10.5194/acp-2018-161

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Comment on acp-2022-84

Zezhen Cheng Megan Morgenstern Bo Zhang Matthew Fraund Nurun Nahar Lata

Abstract. Free tropospheric aerosol particles have important but poorly constrained climate effects due to transformations of their physicochemical properties during long-range transport. In this study, we investigate the chemical composition and provide an overview of the phase states of individual particles that have undergone long-range transport over the North Atlantic Ocean in June and July 2014, 2015, and 2017 to the Observatory of Mount Pico (OMP) in the Azores. The OMP is an ideal site for studying long-range-transported free tropospheric particles because local emissions have a negligible influence and contributions from the boundary layer are rare. We used the FLEXible PARTicle Lagrangian particle dispersion model (FLEXPART) to determine the origins and transport trajectories of sampled air masses and found that most of them originated from North America and recirculated over the North Atlantic Ocean. The FLEXPART analysis showed that the sampled air masses were highly aged (average plume age >10 d). Size-resolved chemical compositions of individual particles were probed using computer-controlled scanning electron microscopy with an energy-dispersive X-ray spectrometer (CCSEM-EDX) and scanning transmission X-ray microscopy with near-edge X-ray absorption fine structure spectroscopy (STXM-NEXAFS). CCSEM-EDX results showed that the most abundant particle types were carbonaceous (∼ 29.9 % to 82.0 %), sea salt (∼ 0.3 % to 31.6 %), and sea salt with sulfate (∼ 2.4 % to 31.5 %). We used a tilted stage interfaced within an environmental scanning electron microscope (ESEM) to determine the phase states of individual submicron particles. We found that most particles (∼ 47 % to 99 %) were in the liquid state at the time of collection due to inorganic inclusions. Moreover, we also observed substantial fractions of solid and semisolid particles (∼ 0 % to 30 % and ∼ 1 % to 42 %, respectively) during different transport patterns and events, reflecting the particles' phase-state variability for different atmospheric transport events and sources. Combining phase state measurements with FLEXPART CO tracer analysis, we found that wildfire-influenced plumes can result in particles with a wide range of viscosities after long-range transport in the free troposphere. We also used temperature and RH values extracted from the Global Forecast System (GFS) along the FLEXPART-simulated path to predict the phase state of the particles during transport and found that neglecting internal mixing with inorganics would lead to an overestimation of the viscosity of free tropospheric particles. Our findings warrant future investigation aiming at the quantitative assessment of the influence of internal mixing on the phase states of the individual particles. This study also provides insights into the chemical composition and phase state of free tropospheric particles, which can help models to reduce uncertainties about the effects of ambient aerosol particles on climate.

Particle (ecology)

10.5194/acp-2022-84-rc2

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The Morphology of Atmospheric Aerosol and Some Implications

Cláudio Mazzoleni Swarup China B. Scarnato Noopur Sharma Janarjan Bhandari

Morphology

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Carbon oxidation state as a metric for describing the chemistry of atmospheric organic aerosol

Nature Chemistry (2011)

Jesse H. Kroll Neil M. Donahue J. L. Jiménez Sean H. Kessler Manjula R. Canagaratna

Carbon fibers

Biogeochemical Cycle

Oxidation state

Atmospheric chemistry

10.1038/nchem.948

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Citations (1,281)

Data representing two separate LC-MS methods for detection and quantification of water-soluble and fat-soluble vitamins in tears and blood serum

Data in Brief (2017)

Maryam Khaksari Lynn Mazzoleni Chunhai Ruan Robert T. Kennedy Adrienne Minerick

Two separate liquid chromatography (LC)-mass spectrometry (MS) methods were developed for determination and quantification of water-soluble and fat-soluble vitamins in human tear and blood serum samples. The water-soluble vitamin method was originally developed to detect vitamins B1, B2, B3 (nicotinamide), B5, B6 (pyridoxine), B7, B9 and B12 while the fat-soluble vitamin method detected vitamins A, D3, 25(OH)D3, E and K1. These methods were then validated with tear and blood serum samples. In this data in brief article, we provide details on the two LC-MS methods development, methods sensitivity, as well as precision and accuracy for determination of vitamins in human tears and blood serum. These methods were then used to determine the vitamin concentrations in infant and parent samples under a clinical study which were reported in "Determination of Water-Soluble and Fat-Soluble Vitamins in Tears and Blood Serum of Infants and Parents by Liquid Chromatography/Mass Spectrometry DOI:10.1016/j.exer.2016.12.007 [1]". This article provides more details on comparison of vitamin concentrations in the samples with the ranges reported in the literature along with the medically accepted normal ranges. The details on concentrations below the limits of detection (LOD) and limits of quantification (LOQ) are also discussed. Vitamin concentrations were also compared and cross-correlated with clinical data and nutritional information. Significant differences and strongly correlated data were reported in [1]. This article provides comprehensive details on the data with slight differences or slight correlations.

Fat-Soluble Vitamin

10.1016/j.dib.2017.02.033

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Ultrahigh Performance Lc/Ft-Ms Non-Targeted Screening for Biomass Combustion Organic Aerosol with Mzmine2 and Mfassignr

Thusitha Divisekara Simeon Schum Lynn Mazzoleni

In recent years, ultrahigh performance liquid chromatography Fourier transform mass spectrometry (LC/FT-MS) based non-targeted screening (NTS) methods have become increasingly popular for comprehensive analysis of complex organic mixtures. However, applying these methods for environmental complex mixture analysis is challenging due to the extreme complexity of natural samples and a lack of standard samples or surrogates for environmental complex mixtures. Furthermore, limited molecular markers in the databases and insufficient data processing software workflows make the application of these methods harder for environmental complex mixtures. In this work, we implement a new NTS data processing workflow to process data collected from ultrahigh performance liquid chromatography and Fourier transform Orbitrap Elite Mass Spectrometry (LC/FT-MS) by combining MZmine2 and MFAssignR, two open source data processing tools and commercial Mesquite liquid smoke as a surrogate for biomass burning aerosol. MZmine2.53 data extraction followed MFAssignR molecular formula assignment offered noise free and highly accurate 1733 individual molecular formulas presented in liquid smoke with 4906 molecular species, including isomers. The results of this new approach were consistent results of direct infusion FT-MS analysis confirming its reliability. Over 90% of the molecular formulas presented in mesquite liquid smoke were matched with the molecular formulas of ambient biomass burning organic aerosol. This suggests the potential use of commercial liquid smoke as a surrogate for biomass combustion organic aerosol research. The presented method significantly improves the identification of the molecular composition of biomass combustion by successfully addressing some of the limitations related to the data analysis and giving a semi quantitative insight into the analysis.

10.2139/ssrn.4393953

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