Influence of Saharan dust outbreaks and carbon content on oxidative potential of water-soluble fractions of PM2.5 and PM10

Chirizzi, Daniela; Cesari, Daniela; Guascito, Maria Rachele; Dinoi, Adelaide; Giotta, Livia; Contini, Daniele

doi:10.1016/j.atmosenv.2017.05.021

Cited by 101 publications

(67 citation statements)

References 49 publications

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“…[27,38] How the Figure 1 shows, the three methods give different results for each types of dusts. In agreement to previous studies [24] this result confirms that the chemical composition plays the most important role in the determination of the oxidative processes induced by PM. The DCFH assay showed to be the less selective method and lead to relevant PO values for all the considered dusts.…”

Section: Resultssupporting

confidence: 82%

“…[20][21][22][23] Although these metods are frequently applied to the study of PM biological effects, there is still a gap of knowledge about the relationship that links PM chemical composition and the oxidative potential results obtained this assays. [24] In this work, we use these selected methods for the determination of the PO of seven types of dusts coming from different emission sources and characterized by a very different chemical composition, with the aim of better investigating the role of the singles components of PM in generating PO. The chosen dusts, already used in a precedent work for the evaluation of the in-vivo genotoxic effects and oxidative stress on specimens of Echinogammarus veneris, represent specific PM sources.…”

Section: Introductionmentioning

confidence: 99%

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Oxidative Potential of Selected PM Components

Conte

Canepari

Frasca

et al. 2017

Proceedings of the 2nd International Electronic Conference on Atmospheric Sciences

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Abstract:The role of the single PM components in inducing the catalytic generation of reactive oxygen species (ROS), has not yet been clarified. Different a-cellular assay are currently used in the literature for the determination of the PM oxidative potential (OP), which is considered as a predictive index of its capacity to generate ROS in biological organisms. In order to better understand the existing correlations between PO and PM generated by specific emission sources, the water soluble and insoluble fractions of seven dust coming from specific sources were chemically characterised and analysed by three PO assays: the dithiothreitol (DTT, the acid ascorbic (AA) and the 2′,7′-dichlorofluorescin (DCFH) assays. PO and chemical data were elaborated by principal constituent analysis. The three methods responded in a very different way to each dust; they are then no-interchangeable and probably none of them is able to correctly predict the ROS generation in biological organisms. DTT was particularly sensitive to organic compounds, while AA was mostly influenced by inorganic components. DCFH results are more difficult to interpret and need to be further deepened. Furthermore, the results confirmed the important role played by the insoluble components of dusts in generating oxidative processes.

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Section: Resultssupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Oxidative Potential of Selected PM Components

Conte

Canepari

Frasca

et al. 2017

Proceedings of the 2nd International Electronic Conference on Atmospheric Sciences

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“…It is generally found that PM2.5 has higher intrinsic DTT activity than PM10 [25,29,43,45,48]. However, while some studies found higher intrinsic DTT activity in quasi-UFP particles than in PM2.5 [14,27,49], the opposite was reported by Steenhof et al [17] for several sites.…”

Section: Size Distribution Of Dtt Activitycontrasting

confidence: 39%

“…Secondary organic compounds have higher DTT activity than their parent gases and primary particles [15,32]. Chirizzi et al [29] found relatively higher correlation coefficients for secondary organic carbon (SOC) compared with primary organic carbon (POC).…”

Section: Correlations Between Dtt Activity and Organic Aerosol Componmentioning

confidence: 99%

“…Several studies have reported strong correlations between DTT activity and organic PM components either the bulk groups of organic species, i.e., OC and WSOC [12,15,19,29,36,52,61], or specific organic compounds such as PAHs [14,25,27,49], quinones [62], levoglucosan [12,14,15,18,25,27,28,50,61], and other biomass burning markers [36]. High correlations with hopanes, in addition to OC and PAHs, have also been reported in some studies [12,15,26,42,61,63], while Shirmohammadi et al [27] found high correlations with hopanes, n-alkanes, and organic acids (phthalic, succinic, and glutaric).…”

Section: Correlations Between Dtt Activity and Organic Aerosol Componmentioning

confidence: 99%

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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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Oxidative potential of the inhalation bioaccessible fraction of PM10 and bioaccessible concentrations of polycyclic aromatic hydrocarbons and metal(oid)s in PM10

Novo–Quiza,

Sánchez–Piñero,

Moreda–Piñeiro

et al. 2024

Environ Sci Pollut Res

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Atmospheric particulate matter (PM) has been related to numerous adverse health effects in humans. Nowadays, it is believed that one of the possible mechanisms of toxicity could be the oxidative stress, which involves the development of reactive oxygen species (ROS). Different assays have been proposed to characterize oxidative stress, such as dithiothreitol (DTT) and ascorbic acid (AA) acellular assays (OPDTT and OPAA), as a metric more relevant than PM mass measurement for PM toxicity. This study evaluates the OP of the bioaccessible fraction of 65 PM10 samples collected at an Atlantic Coastal European urban site using DTT and AA assays. A physiologically based extraction (PBET) using Gamble’s solution (GS) as a simulated lung fluid (SLF) was used for the assessment of the bioaccessible fraction of PM10. The use of the bioaccessible fraction, instead of the fraction assessed using conventional phosphate buffer and ultrasounds assisted extraction (UAE), was compared for OP assessment. Correlations between OPDTT and OPAA, as well as total and bioaccessible concentrations of polycyclic aromatic hydrocarbons (PAHs) and metal(oid)s, were investigated to explore the association between those compounds and OP. A correlation was found between both OP (OPDTT and OPAA) and total and bioaccessible concentrations of PAHs and several metal(oid)s such as As, Bi, Cd, Cu, Ni, and V. Additionally, OPDTT was found to be related to the level of K+.

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Influence of Saharan dust outbreaks and carbon content on oxidative potential of water-soluble fractions of PM2.5 and PM10

Cited by 101 publications

References 49 publications

Oxidative Potential of Selected PM Components

Oxidative Potential of Selected PM Components

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

Oxidative potential of the inhalation bioaccessible fraction of PM10 and bioaccessible concentrations of polycyclic aromatic hydrocarbons and metal(oid)s in PM10

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