Investigation of Desert Dust Contribution to Source Apportionment of PM10 and PM2.5 from a Southern Mediterranean Coast

Kchih, Hassen; Perrino, Cinzia; Cherif, Sémia

doi:10.4209/aaqr.2014.10.0255

Cited by 34 publications

(20 citation statements)

References 65 publications

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“…Time series variations in the concentrations of ionic species (Na + , NH4 + , K + , Mg 2+ , Ca 2+ , SO4 2− , NO2 − , NO3 − , Cl − ) are shown in Figure 4a. Here, the concentrations of calcium carbonate and magnesium carbonates were calculated as the soluble (sol) fractions of Ca and Mg and were added to the calculated CO3 2− concentrations [21]. The CO3 2− was calculated using Equation (1):…”

Section: Ionic Concentrations Of Aerosolsmentioning

confidence: 99%

Compositional Characteristics of Atmospheric Aerosols during a Consecutive High Concentration Episode in Seoul, Korea

Song²,

Kim

et al. 2020

Atmosphere

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This study focuses on the temporal variation in the compositional characteristics of atmospheric aerosols in Seoul, South Korea, during the consecutive high aerosol concentration episode from 30 December 2013 to 2 January 2014. The temporal variations in the observed physical, optical, and chemical properties show that there were three distinct episodes during the period: haze, mixed haze/Asian dust, and Asian dust episodes. For the haze period, the concentration of secondary inorganic aerosols increased and both secondary inorganic aerosols and calcium species exhibited simultaneously high concentrations during the mixed haze/Asian dust period. The neutralization factors by ammonia in the haze periods were higher as 1.03 than the other periods, meanwhile the neutralization contribution by calcium carbonate was relatively higher as 1.39 during the Asian dust episode. The backward trajectory analysis showed that concentrations of SO 4 2− , NO 3 − , and NH 4 + were relatively high when air masses moved over East China. Principal component analysis showed that water-soluble components originated from soil dust/incineration, secondary aerosols/biomass burning, and road dust from the haze aerosol. For the mixed haze/Asian dust episode, the major source of aerosols was estimated to have originated from soil dust, pollutants from fossil fuel combustion, biomass burning, and sea-salt emissions. Furthermore, the main sources of ionic species in the Asian dust aerosols were estimated to be sea-salt/soil dust, secondary aerosols/coal combustion, and road dust.

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Section: Ionic Concentrations Of Aerosolsmentioning

confidence: 99%

Compositional Characteristics of Atmospheric Aerosols during a Consecutive High Concentration Episode in Seoul, Korea

Song²,

Kim

et al. 2020

Atmosphere

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“…where EF sea is the enrichment indicator of a given ion in the precipitation relative to the ion in the sea; X is the ion in the precipitation; (X / Na + ) precipitation represents the ratio of components in the precipitation; and (X / Na + ) sea denotes the ratio of components in the sea (Keene et al, 1986;Turekian, 1968). The EF value of an ion in the precipitation relative to the corresponding ion in the soil was calculated following Eq.…”

Section: Data Calculationmentioning

confidence: 99%

Wet deposition of inorganic ions in 320 cities across China: spatio-temporal variation, source apportionment, and dominant factors

Cui

Zhao

et al. 2019

Atmos. Chem. Phys.

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Abstract. The acid deposition has been considered to be a severe environmental issue in China. The pH, electrical conductivity (EC), and concentrations of water soluble ions (NO3-, Cl−, Ca2+, K+, F−, NH4+, Mg2+, SO42-, and Na+) in the precipitation samples collected from 320 cities during 2011–2016 across China were measured. The mean concentrations of F−, NO3-, and SO42- were in the order of winter (6.10, 19.44, and 45.74 µeq L−1) > spring (3.45, 13.83, and 42.61 µeq L−1) > autumn (2.67, 9.73, and 28.85 µeq L−1) > summer (2.04, 7.66, and 19.26 µeq L−1). Secondary ions (SO42-, NO3-, and NH4+) and F− peaked in the Yangtze River Delta (YRD) and Sichuan basin (SB). Crustal ions (i.e. Ca2+, Mg2+), Na+, and Cl− showed the highest concentrations in the semi-arid regions and the coastal cities. The statistical methods confirmed that the mean anthropogenic contribution ratios to SO42-, F−, NO3-, and NH4+ at a national scale were 46.12 %, 71.02 %, 79.10 %, and 82.40 %, respectively. However, Mg2+ (70.51 %), K+ (77.44 %), and Ca2+ (82.17 %) mostly originated from the crustal source. Both Na+ (70.54 %) and Cl− (60.42 %) were closely linked to sea salt aerosols. On the basis of the stepwise regression (SR) analysis, it was proposed that most of the secondary ions and F− were closely related to gross industrial production (GIP), total energy consumption (TEC), vehicle ownership, and N fertilizer use, but the crustal ions (Ca2+ and K+) were mainly controlled by the dust events. The influence of dust days, air temperature, and wind speed on ions increased from southeast China (SEC) to central China, and then to northwest China (NWC), whereas the influence of socioeconomic factors on acid ions (SO42- and NO3-) displayed the higher value in east China.

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“…Factor 3 occupied 9.54% of the total variance and was dominated by Ca 2+ , Mg 2+ , and K + . The former two ions were considered to be the important indicators of crustal origin or windblown dust source, which were commonly stored in soils and dusts (Kchih et al, 2015). K + was also observed in urban fugitive dusts, although it was generally considered as an important fingerprint of biomass burning (Shen et al, 2016).…”

Section: The Fa-mlr Analysismentioning

confidence: 99%

The wet deposition of the inorganic ions in the 320 cities across China: spatiotemporal variation, source apportionment, and dominant factors

Li¹,

Cui²,

Zhao³

et al. 2019

Preprint

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Abstract. The acid deposition has been considered to be a severe environmental issue in China. The pH, electrical conductivity (EC), and the concentrations of the water soluble ions (NO3&#8722;, Cl&#8722;, Ca2+, K+, F&#8722;, NH4+, Mg2+, SO42&#8722;, and Na+) in the precipitation samples collected from the 320 cities during 2011&#8211;2016 across the whole China were measured. The mean concentrations of F&#8722;, NO3&#8722; and SO42&#8722; were in the order of winter (6.10, 19.44 and 45.74&#8201;&#956;eq/L) > spring (3.45, 13.83, and 42.61&#8201;&#956;eq/L) > autumn (2.67, 9.73, and 28.85&#8201;&#956;eq/L) > summer (2.04, 7.66, and 19.26&#8201;&#956;eq/L). The secondary ions (SO42&#8722;, NO3&#8722; and NH4+), and F&#8722; peaked in Yangtze River Delta (YRD) and Sichuan basin (SB). The crustal ions (i.e., Ca2+, Mg2+), Na+, and Cl&#8722; showed the highest concentrations in the semi-arid regions and the coastal cities, respectively. The statistical methods confirmed that the mean anthropogenic contribution ratios to SO42&#8722;, F&#8722;, NO3&#8722;, and NH4+ at a national scale were 46.12&#8201;%, 71.02&#8201;%, 79.10&#8201;%, and 82.40&#8201;%, respectively. However, Mg2+ (70.51&#8201;%), K+ (77.44&#8201;%), and Ca2+ (82.17&#8201;%) were mostly originated from the crustal source. Both Na+ (70.54&#8201;%) and Cl&#8722; (60.42&#8201;%) were closely linked to the sea-salt aerosols. On the basis of the stepwise regression (SR) analysis, it was proposed that most of the secondary ions and F&#8722; were closely related to gross industrial production (GIP), total energy consumption (TEC), vehicle ownership, and N fertilizer use, but the crustal ions (Ca2+ and K+) were mainly controlled by the dust events. The influence of dust days, air temperature, and wind speed on ions increased from Southeast China (SEC) to Central China, and then to Northwest China (NWC), whereas the influence of socioeconomic factors on acid ions (SO42&#8722; and NO3&#8722;) displayed the higher value in East China.

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Investigation of Desert Dust Contribution to Source Apportionment of PM10 and PM2.5 from a Southern Mediterranean Coast

Cited by 34 publications

References 65 publications

Compositional Characteristics of Atmospheric Aerosols during a Consecutive High Concentration Episode in Seoul, Korea

Compositional Characteristics of Atmospheric Aerosols during a Consecutive High Concentration Episode in Seoul, Korea

Wet deposition of inorganic ions in 320 cities across China: spatio-temporal variation, source apportionment, and dominant factors

The wet deposition of the inorganic ions in the 320 cities across China: spatiotemporal variation, source apportionment, and dominant factors

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