Spatial and seasonal variations of the chemical, mineralogical and morphological features of quasi-ultrafine particles (PM0.49) at urban sites

Samara, Constantini; Kantiranis, Nikolaos; Kollias, Panagiotis; Planou, Styliani; Κούρας, Αθανάσιος; Besis, Athanasios; Manoli, E.; Voutsa, Dimitra

doi:10.1016/j.scitotenv.2016.02.080

Cited by 38 publications

(12 citation statements)

References 61 publications

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“…Particulate carbonaceous species (OC, EC) were measured using the thermal optical transmission (TOT) method following the NIOSH (National Institute for Occupational Safety and Health) 870 protocol, as described in [39]. Due to the lack of adequate amount of PM sample from slotted filters, OC and EC were measured only in the <0.49 µm particle mode.…”

Section: Determination Of Wsoc and Particulate Carbonaceous Speciesmentioning

confidence: 99%

On the Redox Activity of Urban Aerosol Particles: Implications for Size Distribution and Relationships with Organic Aerosol Components

Samara

2017

Atmosphere

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This article presents the distribution of the dithiothreitol-based (DTT) redox activity of water-soluble airborne particulate matter (PM) from two urban sites in the city of Thessaloniki, northern Greece in four size ranges (<0.49, 0.49-0.97, 0.97-3.0 and >3 µm). Seasonal and spatial variations are examined. The correlations of the mass-normalized DTT activity with the content of PM in water-soluble organic carbon (WSOC) and non-water-soluble carbonaceous species, such as organic and elemental carbon, as well as with solvent-extractable trace organic compounds (polycyclic aromatic hydrocarbons and nitro-derivatives, polychlorinated biphenyls, organochlorines, polybrominated biphenyl ethers) and polar organic markers (dicarboxylic acids and levoglucosan), are investigated. Our study provides new and additional insights into the ambient size distribution of the DTT activity of the water-soluble fraction of airborne PM at urban sites and its associations with organic PM components.

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Section: Determination Of Wsoc and Particulate Carbonaceous Speciesmentioning

confidence: 99%

On the Redox Activity of Urban Aerosol Particles: Implications for Size Distribution and Relationships with Organic Aerosol Components

Samara

2017

Atmosphere

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“…Among which, positive matric factorization (PMF) is one of the most used approach in source apportionment works around the world nowadays (Belis et al, 2013), which can quantify the contribution of sources to samples based on the composition. In fact, particles possess different shapes, sizes, and chemical composition in relation to emission sources (Samara et al, 2016). Scanning electron microscopy (SEM) coupled with energy dispersive X-ray spectrometry (EDX) is another powerful tool for the characterization of particles in terms of morphology and chemical composition, which can provide a clearer insight into the origin of particles (Ebert et al, 2002(Ebert et al, , 2004.…”

Section: Introductionmentioning

confidence: 99%

“…Scanning electron microscopy (SEM) coupled with energy dispersive X-ray spectrometry (EDX) is another powerful tool for the characterization of particles in terms of morphology and chemical composition, which can provide a clearer insight into the origin of particles (Ebert et al, 2002(Ebert et al, , 2004. In recent years, several studies have employed an integrated approach based on statistical analysis and individual particle micro-analyses to characterize single particles in order to identify the possible emission sources, and assess the common health and environmental effects (Yue et al, 2006;Beatrice et al, 2012;Genga et al, 2012;Samara et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Characteristics, Sources, and Health Risk Assessment of Trace Elements in PM10 at an Urban Site in Chengdu, Southwest China

Cheng

Huang

Shipeng

et al. 2018

Aerosol Air Qual. Res.

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To investigate trace element pollution of PM 10 in urban Chengdu, a Southwest megacity of China, as well as to assess the human health risks caused by exposure to PM 10 , we analyzed ambient PM 10 samples collected at an urban site in Chengdu from November, 2014 to October, 2015. The annual mean concentration of PM 10 in the sampling period was 173.6 ± 77.9 µg m -3 , which is 2.5 times higher than the national recommended standard of 70 µg m -3 . The mean metals content in PM 10 was in the following order:The concentration of As in PM 10 was observed to be 2.9 times higher than the secondary level recommended by the China National Ambient Air Quality Standard (GB3095-2012), whereas the concentrations of other metals were within the limit. Enrichment factor analysis indicated that As, Pb, Zn, Cu, Cd, and Sb mainly originated from anthropogenic sources. Five factors were identified by positive matric factorization (PMF) model. The sources identified were soil dust (48.4%), road dust (19.4%), fossil fuel combustion (14.9%), electroplating industry (13.8%), and metallurgy industry (3.5%). Particle morphology and chemical composition analysis revealed six major particle types, namely aluminosilicate, sulfur-containing, carbon-containing, chlorine-containing, biomass burning, and metal particles. The results of the health risk assessment indicated that Cr can be carcinogenic to both children and adults, and other trace elements were determined to be below the legislation threshold (Environmental Protection Agency limit values), except for As, which was observed to be above the threshold.

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“…SEM-EDX is a powerful tool for understanding the elemental composition, morphology, and density of particles, and it provides more definitive insight into the origin of particles than other methods do (Samara et al, 2016). The morphological properties of PM 10 collected from the three sites are presented in Fig.…”

Section: Particles Morphology Characteristicsmentioning

confidence: 99%

Assessment of Air Pollution around the Panzhihua V-Ti Magnetite Mine Region, Southwest China

Cheng

Huang

Liu

et al. 2017

Aerosol Air Qual. Res.

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This study investigated variations in air quality by evaluating trace gases, inhalable particulate matter (PM 10 ), and associated trace elements at three sites in Panzhihua (a mining city located in Panxi Rift Valley, Southwest China) between January and December 2014. The concentrations of 19 trace elements in PM 10 were determined through inductively coupled plasma mass spectrometry. Single particle morphology and chemical composition were determined through scanning electron microscopy with energy-dispersive X-ray analysis to identify their possible sources. Mean sulfur dioxide, nitrogen dioxide, and carbon monoxide concentrations were highest near the steel smelting district, whereas ozone concentrations were highest in the residential region. Annual mean concentrations of PM 10 at three sites were 129.4, 165.5, and 187.2 µg m -3 ; all these exceed the annual mean (70.0 µg m -3 ) of the National Ambient Air Quality Standard. In addition, the concentrations of trace elements in PM 10 exhibited significant spatial and seasonal variations at the three sites. The mean concentrations of trace elements in PM 10 were in the order of Fe > Ti > Zn > Pb > Cu > Mn > Ba > V > Cr > Ni > Sr > Bi > Cd > As > Co > Sb > Sc > TI > U. The enrichment factor values of the trace elements suggested that anthropogenic activities were the dominant sources of As, Cd, Sb, Ti, TI, Zn, Cu, Pb, and Bi. Particle morphology and chemical composition analysis revealed five major particle types, namely aluminosilicate, Fe-containing, mineral, soot, and Ca-containing particles.

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Spatial and seasonal variations of the chemical, mineralogical and morphological features of quasi-ultrafine particles (PM0.49) at urban sites

Cited by 38 publications

References 61 publications

On the Redox Activity of Urban Aerosol Particles: Implications for Size Distribution and Relationships with Organic Aerosol Components

On the Redox Activity of Urban Aerosol Particles: Implications for Size Distribution and Relationships with Organic Aerosol Components

Characteristics, Sources, and Health Risk Assessment of Trace Elements in PM10 at an Urban Site in Chengdu, Southwest China

Assessment of Air Pollution around the Panzhihua V-Ti Magnetite Mine Region, Southwest China

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