Aerosol size distribution estimation and associated uncertainty for measurement with a Scanning Mobility Particle Sizer (SMPS)

Coquelin, Loïc; Fischer, Nicolas; Charles, Matthew; Macé, Tatiana; Gensdarmes, F.; Brusquet, Laurent Le; Fleury, Gilles

doi:10.1088/1742-6596/429/1/012018

Cited by 6 publications

(4 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The NF characterization station included a second PM 4 PPI and a 10 l buffer bottle to which a scanning mobility particle sizer (SMPS: Grimm Ainring, Germany, models 55-40-25 DMA and 5.403 CPC) and a second DiscMini particle counter were connected. The SMPS measures particles in a size range from 10 to 1110nm in 31 different size channels and in concentrations up to 10 7 particles cm −3 , and has been widely used as the standard for measuring airborne particle size distributions due to its ability to conduct differential mobility analysis of various particles ( Wang and Flagan, 1990 ; Coquelin et al , 2013 ; further information about SMPS sizing methods is included in Supplementary Material, note S1 ). The SMPS was set to fast scan mode with measurement cycles of 3.5min.…”

Section: Methodsmentioning

confidence: 99%

Characterization of Tungsten Inert Gas (TIG) Welding Fume Generated by Apprentice Welders

Graczyk

Lewinski

Zhao

et al. 2015

ANNHYG

View full text Add to dashboard Cite

Tungsten inert gas welding (TIG) represents one of the most widely used metal joining processes in industry. Its propensity to generate a greater portion of welding fume particles at the nanoscale poses a potential occupational health hazard for workers. However, current literature lacks comprehensive characterization of TIG welding fume particles. Even less is known about welding fumes generated by welding apprentices with little experience in welding. We characterized TIG welding fume generated by apprentice welders (N = 20) in a ventilated exposure cabin. Exposure assessment was conducted for each apprentice welder at the breathing zone (BZ) inside of the welding helmet and at a near-field (NF) location, 60cm away from the welding task. We characterized particulate matter (PM4), particle number concentration and particle size, particle morphology, chemical composition, reactive oxygen species (ROS) production potential, and gaseous components. The mean particle number concentration at the BZ was 1.69E+06 particles cm−3, with a mean geometric mean diameter of 45nm. On average across all subjects, 92% of the particle counts at the BZ were below 100nm. We observed elevated concentrations of tungsten, which was most likely due to electrode consumption. Mean ROS production potential of TIG welding fumes at the BZ exceeded average concentrations previously found in traffic-polluted air. Furthermore, ROS production potential was significantly higher for apprentices that burned their metal during their welding task. We recommend that future exposure assessments take into consideration welding performance as a potential exposure modifier for apprentice welders or welders with minimal training.

show abstract

Section: Methodsmentioning

confidence: 99%

Characterization of Tungsten Inert Gas (TIG) Welding Fume Generated by Apprentice Welders

Graczyk

Lewinski

Zhao

et al. 2015

ANNHYG

View full text Add to dashboard Cite

show abstract

“…Among others, Bond et al (2013) discussed specific issues related to BC and OC aerosols, while for PM size distribution there exists specific analysis for particular measurement equipment (e.g. Armas et al, 2007;Coquelin et al, 2013) and most of the studies reporting measurements of size distribution estimate uncertainties for each size category. While the sum of all the PM species is constrained by the total mass, the single size distribution values rely on a large number of measurements, reducing the overall uncertainty.…”

Section: Uncertainty In Emission Estimatesmentioning

confidence: 99%

Global anthropogenic emissions of particulate matter including black carbon

et al. 2017

View full text Add to dashboard Cite

Abstract. This paper presents a comprehensive assessment of historical global anthropogenic particulate matter (PM) emissions including the consistent and harmonized calculation of mass-based size distribution (PM 1 , PM 2.5 , PM 10 ), as well as primary carbonaceous aerosols including black carbon (BC) and organic carbon (OC). The estimates were developed with the integrated assessment model GAINS, where source-and region-specific technology characteristics are explicitly included. This assessment includes a number of previously unaccounted or often misallocated emission sources, i.e. kerosene lamps, gas flaring, diesel generators, refuse burning; some of them were reported in the past for selected regions or in the context of a particular pollutant or sector but not included as part of a total estimate. Spatially, emissions were calculated for 172 source regions (as well as international shipping), presented for 25 global regions, and allocated to 0.5 • × 0.5 • longitude-latitude grids. No independent estimates of emissions from forest fires and savannah burning are provided and neither windblown dust nor unpaved roads emissions are included.We estimate that global emissions of PM have not changed significantly between 1990 and 2010, showing a strong decoupling from the global increase in energy consumption and, consequently, CO 2 emissions, but there are significantly different regional trends, with a particularly strong increase in East Asia and Africa and a strong decline in Europe, North America, and the Pacific region. This in turn resulted in important changes in the spatial pattern of PM burden, e.g. European, North American, and Pacific contributions to global emissions dropped from nearly 30 % in 1990 to well below 15 % in 2010, while Asia's contribution grew from just over 50 % to nearly two-thirds of the global total in 2010. For all PM species considered, Asian sources represented over 60 % of the global anthropogenic total, and residential combustion was the most important sector, contributing about 60 % for BC and OC, 45 % for PM 2.5 , and less than 40 % for PM 10 , where large combustion sources and industrial processes are equally important. Global anthropogenic emissions of BC were estimated at about 6.6 and 7.2 Tg in 2000 and 2010, respectively, and represent about 15 % of PM 2.5 but for some sources reach nearly 50 %, i.e. for the transport sector. Our global BC numbers are higher than previously published owing primarily to the inclusion of new sources.This PM estimate fills the gap in emission data and emission source characterization required in air quality and climate modelling studies and health impact assessments at a regional and global level, as it includes both carbonaceous and non-carbonaceous constituents of primary particulate matter emissions. The developed emission dataset has been used in several regional and global atmospheric transport and climate model simulations within the ECLIPSE (Evaluating the Climate and Air Quality Impacts of Short-Lived Pollutants) project and beyo...

show abstract

“…The aerosol mobility distributions were measured in both positive and negative polarities with a DMA and a condensation particle counter (CPC) for both the post-DBD neutralizer and a radioactive ( 85 Kr of 74 MBq) neutralizer. The TSI SMPS software (Aerosol Instrument Manager, Version 8.0; TSI Inc., Shoreview, MN, USA) was used to calculate particle size distribution from the mobility distributions measured with the DMA-CPC system, relative SMPS measurement uncertainties are treated in Coquelin et al (2013).…”

Section: Aerosol Production and Characterizationmentioning

confidence: 99%

Ozone-free post-DBD aerosol bipolar diffusion charger: Evaluation as neutralizer for SMPS size distribution measurements

Mathon

Jidenko

Borra

2016

Aerosol Science and Technology

View full text Add to dashboard Cite

A postplasma neutralizer for submicron particles size measurements by mobility analysis has been evaluated. Bipolar ion currents have been measured downstream a dielectric barrier discharge (DBD) to estimate the ion fluxes at the inlet of charging volume and the n i ¢t product that define the theoretical maximal concentration that can be neutralized. Charge distributions were measured versus DBD voltage, aerosol diameter and concentration for monodisperse aerosols. It is confirmed that the charge distribution of particles depends on the ratio of initial positive and negative ion currents controlled by the DBD voltage leading to a tuneable mean charge of aerosol in this post-DBD bipolar charger. As expected from Gunn's law, the mean charge and the variance are proportional to particle diameter above 50 nm and independent of the aerosol concentration. The size distributions measured with 85 Kr and post-DBD neutralizer present the same modal diameters and a maximal overestimation of the total concentration of 10%, for aerosol from 15 to 730 nm with concentrations up to 6 £ 10 12 m ¡3. This post-DBD bipolar charger can be used for submicron aerosol neutralization and thus for scanning mobility particle sizer size distribution measurements in air as well as in nitrogen to suppress ozone downstream DBD.

show abstract

Aerosol size distribution estimation and associated uncertainty for measurement with a Scanning Mobility Particle Sizer (SMPS)

Cited by 6 publications

References 11 publications

Characterization of Tungsten Inert Gas (TIG) Welding Fume Generated by Apprentice Welders

Characterization of Tungsten Inert Gas (TIG) Welding Fume Generated by Apprentice Welders

Global anthropogenic emissions of particulate matter including black carbon

Ozone-free post-DBD aerosol bipolar diffusion charger: Evaluation as neutralizer for SMPS size distribution measurements

Contact Info

Product

Resources

About