Rain-Aerosol Coupling in a Rural Area in the Basque Country (Spain): Scavenging Ratios

Encinas, D.; Casado, H.

doi:10.1080/027868299304462

Cited by 11 publications

(2 citation statements)

References 5 publications

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“…In addition, particulate concentrations proximal to material crushers were lower than that measured at the other source types because the moisture content of gravel at the crushers was higher than that at the other emission source types. Conversely, it was found that concentrations and ERs increased with an increase in silt content, which is similar to the findings, 15,16 thus indicating that construction materials with greater proportions of fines have potential to be eroded by wind. These results verify that moisture and silt content of materials influence the particulate ERs from each of the source types studied, as expected.…”

Section: The Influence Of Moisture Content and Siltsupporting

confidence: 82%

Fugitive Dust Emission Source Profiles and Assessment of Selected Control Strategies for Particulate Matter at Gravel Processing Sites in Taiwan

Chang

Lin

et al. 2010

Journal of the Air & Waste Management Association

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Particles emitted from gravel processing sites are one contributor to worsening air quality in Taiwan. Major pollution sources at gravel processing sites include gravel and sand piles, unpaved roads, material crushers, and bare ground. This study analyzed fugitive dust emission characteristics at each pollution source using several types of particle samplers, including total suspended particulates (TSP), suspended particulate (PM10), fine suspended particulate (PM2.5), particulate sizer, and dust-fall collectors. Furthermore, silt content and moisture in the gravel were measured to develop particulate emission factors. The results showed that TSP (< 100 microm) concentrations at the boundary of gravel sites ranged from 280 to 1290 microg/m3, which clearly exceeds the Taiwan hourly air quality standard of 500 microg/m3. Moreover, PM10 concentrations, ranging from 135 to 550 microg/m3, were also above the daily air quality standard of 125 microg/m3 and approximately 1.2 and 1.5 times the PM2.5 concentrations, ranging from 105 to 470 microg/m3. The size distribution analysis reveals that mass mean diameter and geometric standard deviation ranged from 3.2 to 5.7 microm and from 2.82 to 5.51, respectively. In this study, spraying surfactant was the most effective control strategy to abate windblown dust from unpaved roads, having a control efficiency of approximately 93%, which is significantly higher than using paved road strategies with a control efficiency of approximately 45%. For paved roads, wet suppression provided the best dust control efficiencies ranging from 50 to 83%. Re-vegetation of disturbed ground had dust control efficiencies ranging from 48 to 64%.

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Section: The Influence Of Moisture Content and Siltsupporting

confidence: 82%

Fugitive Dust Emission Source Profiles and Assessment of Selected Control Strategies for Particulate Matter at Gravel Processing Sites in Taiwan

Chang

Lin

et al. 2010

Journal of the Air & Waste Management Association

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“…These aspects show the inuence of the dust aerosols with particles of calcium and the presence of high levels of NO 3 À probably due to the absorption of HNO 3 gas by the coarse particles carrying Ca 2+ ions, which have a basic character. 45 Fig. 6(a) shows the local wind roses during the 24 h measurement interval for each sample day.…”

Section: Saharan Dust Intrusionsmentioning

confidence: 99%

Atmospheric particulate matter levels, chemical composition and optical absorbing properties in Camagüey, Cuba

Barja

Mogo

Cachorro

et al. 2013

Environ. Sci.: Processes Impacts

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Atmospheric aerosol particles were collected at Camagüey, Cuba, during the period from February 2008 to April 2009 in order to know the particulate matter levels (PM) together with a general chemical and absorption characterization. The aerosols collection was carried out with a low volume particulate impactor twice a week. Gravimetric analysis of the particulate matter fractions PM10 and PM1 was carried out. An analysis of the eight major inorganic species (Na (+), K(+), Ca(2+), Mg(2+), NH4 (+), Cl(-), NO3(-) and SO4 (2-)) using ionic chromatography was conducted. The results were analyzed in two periods, the high aerosol concentration period (May to August) and the period with low aerosol concentration (the other months). During the high concentration period the average PM10 and PM1 levels were 35.11 μg m (-3) (std = 15.45 μg m(-3)) and 16.86 μg m(-3) (std = 6.14 μg m (-3)). During the low concentration period the average PM10 and PM1 levels were 23.13 μg m (-3) (std = 5.00 μg m(-3)) and 13.00 μg m(-3) (std = 4.02 μg m (-3)). For both periods, Cl(-), Na(+) and NO3 (-) are the predominant species in the coarse fraction (PM1-10), and SO 4(2-)and NH4(+) are the predominant species in the fine fraction (PM1). The spectral aerosol absorption coefficient, σ a, was measured for the wavelength range 400-700 nm with 10 nm steps. The σ a values were obtained with a filter transmission method for the fine fraction and were evaluated for 54 days covering a wide range of atmospheric conditions including a Saharan dust intrusion. σ a ranges from 8.5 M m(-1) to 34.5 M m(-1) at a wavelength of 550 nm, with a mean value of 18.7 M m (-1). The absorption Ångström parameter, αa, calculated for the pair of wavelengths (450/700 nm) presents a mean value of 0.33 (std = 0.19), which is a very low value comparing with those that can be found in the bibliography. Although the sampling period is short, these data represent the first evaluation of PM values with their chemical and optical absorption characterization in Cuba. In addition to the regional interest, the presented values can be directly used by those working with absorption, forcing by aerosols and radiative transfer calculations in general. Also, these data can be used as input in Global Climate Models.

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Rain-aerosol coupling in the tropical atmosphere of Southeast Asia: distribution and scavenging ratios of major ionic species

Balasubramanian

2008

J Atmos Chem

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Rain-Aerosol Coupling in a Rural Area in the Basque Country (Spain): Scavenging Ratios

Cited by 11 publications

References 5 publications

Fugitive Dust Emission Source Profiles and Assessment of Selected Control Strategies for Particulate Matter at Gravel Processing Sites in Taiwan

Fugitive Dust Emission Source Profiles and Assessment of Selected Control Strategies for Particulate Matter at Gravel Processing Sites in Taiwan

Atmospheric particulate matter levels, chemical composition and optical absorbing properties in Camagüey, Cuba

Rain-aerosol coupling in the tropical atmosphere of Southeast Asia: distribution and scavenging ratios of major ionic species

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