Influence of mineral dust on the concentration and composition of PM10 in the city of Constantine

Lokorai, Kanza; Ali-Khodja, Hocine; Khardi, Salah; Bencharif-Madani, Fairouz; Naidja, Lamri; Bouziane, Mokhtar

doi:10.1016/j.aeolia.2021.100677

Cited by 14 publications

(6 citation statements)

References 71 publications

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“…Seven elements (Ca, Mg, Al, Ti, Fe, K, and Na) account for 98% of the total analyzed inorganic burden. To estimate the mineral dust contribution from elemental constituents associated with crustal origin, we used the equation from the model presented by Lokorai et al [52] that converts the elements into their common oxide. From the calculation of mineral dust oxide, a contribution between 37 and 56% can be estimated.…”

Section: Resultsmentioning

confidence: 99%

“…Elemental ratios are valuable tools in environmental and atmospheric sciences for estimating sources of air masses and identifying regional differences in the chemical composition of dust [52,55]. The study of the elementary relationships between specific elements such as Al, Si, Fe, Mg, K, Ca, and Ti can provide valuable information on the presence of Sahara dust and the possible origin of the Sahara dust that crossed the Mediterranean, reaching Europe.…”

Section: Resultsmentioning

confidence: 99%

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Influence of Saharan Dust on the Composition of Urban Aerosols in Palermo City (Italy)

Varrica,

Alaimo

2024

Atmosphere

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The Mediterranean Basin is involved in a recurring phenomenon wherein air masses laden with dust from North Africa impact the southern regions of the European continent. Saharan dust has been associated with increased mortality and respiratory symptoms. Palermo is a large coastal city, and in addition to the impact of desert dust particles, it has a mixture of anthropogenic sources of pollutants. In this study, we collected Saharan dust samples during August 2022 and October 2023, following a high-intensity Saharan dust event, and measured concentrations of 33 major and trace elements as well as Rare Earth Elements (REE). The mineralogical characterization of the deposition dust collected during Saharan events revealed calcite, dolomite, quartz, and clay minerals. The presence of palygorskite is indicative of Saharan events. Seven elements (Ca, Mg, Al, Ti, Fe, K, and Na) account for 98% of the total analyzed inorganic burden. Elemental ratios are valuable tools in atmospheric sciences for estimating sources of air masses. The results highlight that the city of Palermo is mainly affected by dust from the north-western Sahara.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Influence of Saharan Dust on the Composition of Urban Aerosols in Palermo City (Italy)

Varrica,

Alaimo

2024

Atmosphere

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“…This was probably due to the higher contribution of crustal dust to PM 10 . In fact, on that day, much higher concentrations of all the elements released in the insoluble fraction of PM 10 by resuspension of coarse mineral dust [59][60][61], such as Al, Cs, Fe, Li e Rb (Table 1), were recorded. It is well-known that OP AA predominantly responds to coarse particles [26,62], and it is assumed that a relevant contribution to the TOP was due to a higher contribution of soil dust on this day.…”

Section: Wsop Vs Topmentioning

confidence: 94%

A New Method for the Assessment of the Oxidative Potential of Both Water-Soluble and Insoluble PM

et al. 2022

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Water-soluble and insoluble fractions of airborne particulate matter (PM) exhibit different toxicological potentials and peculiar mechanisms of action in biological systems. However, most of the research on the oxidative potential (OP) of PM is focused exclusively on its water-soluble fraction, since experimental criticisms were encountered for detaching the whole PM (soluble and insoluble species) from field filters. However, to estimate the actual potential effects of PM on human health, it is essential to assess the OP of both its water-soluble and insoluble fractions. In this study, to estimate the total OP (TOP), an efficient method for the detachment of intact PM10 from field filters by using an electrical toothbrush was applied to 20 PM10 filters in order to obtain PM10 water suspensions to be used for the DCFH, AA and DTT oxidative potential assays (OPDCFH, OPAA and OPDTT). The contribution of the insoluble PM10 to the TOP was evaluated by comparing the TOP values to those obtained by applying the three OP assays to the water-soluble fraction of 20 equivalent PM10 filters. The OP of the insoluble fraction (IOP) was calculated as the difference between the TOP and the WSOP. Moreover, each PM10 sample was analyzed for the water-soluble and insoluble fractions of 10 elements (Al, Cr, Cs, Cu, Fe, Li, Ni, Rb, Sb, Sn) identified as primary elemental tracers of the main emission sources in the study area. A principal component analysis (PCA) was performed on the data obtained to identify the predominant sources for the determination of TOP, WSOP, and IOP. Results showed that water-soluble PM10 released by traffic, steel plant, and biomass burning is mainly responsible for the generation of the TOP as well as of the WSOP. This evidence gave strength to the reliability of the results from OP assays performed only on the water-soluble fraction of PM. Lastly, the IOPDCFH and IOPDTT were found to be principally determined by insoluble PM10 from mineral dust.

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“…The sources of PM are highly varied, which explains its complex chemical composition, as mentioned above. Natural sources include mineral dust from arid areas, such as the Saharan desert [19] and volcanic eruptions [20]. Maritime and vehicular traffic [21,22], industrial activities [23,24], or agricultural activities [25] are examples of anthropogenic sources.…”

Section: Introductionmentioning

confidence: 99%

Development of Cellulose Air Filters for Capturing Fine and Ultrafine Particles through the Valorization of Banana Cultivation Biomass Waste

Martín-Cruz,

Bordón,

Pulido-Melián

et al. 2024

Environments

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Outdoor and indoor atmospheric pollution is one of the major problems that humanity continues to face. As a mitigation pathway, numerous technologies have been developed for air purification, including the use of fibrous filters. In this study, the particle capture efficiencies and pressure drops of air filters manufactured with cellulose pulp extracted from banana pseudostems were studied across three particle size ranges (PM10, PM2.5, and PM1). Two pretreatments were applied, alkaline with soda-antraquinone (alkali-treated pulp) and a subsequent bleaching process (bleached pulp), and four manufacturing processes were tested: crushing, freeze-drying, vacuum filtration, and pressing. In addition, a study varying filter grammage (70, 100, and 160 g·m−2) and pressing pressures (2, 4, 6, and 8 t) was also performed. After conducting these particle tests, the filter manufactured with bleached pulp, having a grammage of 160 g·m−2 and pressed at 4 t, was deemed the optimal individual solution. It demonstrated high particle retention efficiencies across all particle size ranges (with values exceeding 80%), a moderate pressure drop below 1000 Pa, and high thermal stability (degradation above 220 °C). However, combining freeze-drying and two-ton pressing processes yielded improved results (83% for the smallest particles and 89% for others) with approximately half the pressure drop. Based on these results, this study stands as a noteworthy contribution to waste valorization and the advancement of environmentally friendly materials for particle air filters. This is achieved through the adoption of simple and cost-effective technology, coupled with the utilization of 100% natural agricultural waste as the primary manufacturing material.

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Influence of mineral dust on the concentration and composition of PM10 in the city of Constantine

Cited by 14 publications

References 71 publications

Influence of Saharan Dust on the Composition of Urban Aerosols in Palermo City (Italy)

Influence of Saharan Dust on the Composition of Urban Aerosols in Palermo City (Italy)

A New Method for the Assessment of the Oxidative Potential of Both Water-Soluble and Insoluble PM

Development of Cellulose Air Filters for Capturing Fine and Ultrafine Particles through the Valorization of Banana Cultivation Biomass Waste

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