The magnetic properties of indoor dust fractions as markers of air pollution inside buildings

The composition of urban dust can affect the health of urban populations, making it necessary to study its elemental composition and its sources. Our objectives were: a) to identify the main emission sources of heavy metals, and b) to evaluate the influence of land use and road type on the elemental composition of urban dust. 100 samples of urban dust taken in San Luis Potosí were analyzed using FRX. Descriptive statistics, Pearson's correlations coefficient, kriging interpolations, and analysis of variance were applied to the data. Cu and Zn were spatially associated with a metallurgical complex and, to a lesser extent, with an industrial park; Ca with fluorite and limestone industries, and Si with the surrounding soils. The highest concentrations of Cu, Zn, and Ca were found in mixed and industrial land uses. On the contrary, the highest concentrations of "natural elements" (Al, K, Si, Rb, and Y) were found in developable land and residential areas. The highest contents of Ca were found in secondary and primary roads. The conclusions were: a) the metallurgical complex is the main source of Cu and Zn, and b) the highest concentrations of Cu, Zn, and Ca were found in mixed and industrial land uses.

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“…9). Ca has been referred to as an element associated with vehicular traffic [36], and the results of this study support this notion.…”

Section: Calciumsupporting

confidence: 83%

Influence of Land Use and Road Type on the Elemental Composition of Urban Dust in a Mexican Metropolitan Area

Aguilera¹,

Armendáriz²,

Quintana³

et al. 2019

Pol. J. Environ. Stud.

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“…A detailed description of the sampling procedure can be found in previous works, e.g., Górka-Kostrubiec et al (2014) and Górka-Kostrubiec (2015). …”

Section: Methods and Measurementsmentioning

confidence: 99%

“…Other studies have focused on magnetic properties of indoor dust as a potential indicator of indoor air quality (Górka-Kostrubiec et al 2014; Górka-Kostrubiec 2015; Szczepaniak-Wnuk and Górka-Kostrubiec 2016). …”

Section: Introductionmentioning

confidence: 99%

Magnetic study of a mixture of magnetite and metallic iron in indoor dust samples

Górka-Kostrubiec

Szczepaniak-Wnuk

2016

Air Qual Atmos Health

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Magnetite in mixture with metallic iron in indoor dust samples was examined using several magnetic analyses, thermomagnetic curves of the magnetic susceptibility and the induced magnetization vs. temperature, hysteresis loops, and first-order reversal curves. The study of the magnetic properties was supplemented by the analysis of chemical elements and electron microscopic observation. The metallic iron in the mixture affects the values of hysteresis parameters, decreasing coercivity (B c) and increasing saturation magnetization (M s), and it is responsible for the magnetic enhancement of magnetic susceptibility. The thermomagnetic curves show several distinct features: the first Curie temperature of magnetite, the second one (∼764 °C) of iron, and the rapid decrease on the heating curves (between 600 and 750 °C) caused by the oxidation of iron to magnetite. Two magnetochemical processes appear during the thermal treatment of indoor dust: the oxidation of iron to magnetite and the neo-formation of magnetite as a result of chemical transformation of non-magnetic minerals. The shift of the hysteresis parameter ratios from the multi-domain (MD) region towards the single-domain (SD) region on the Day-Dunlop plot is controlled by the oxidation of iron in the thermally induced process and the grain size of the new formed magnetite. The magnetic properties of indoor dust are a potential indicator of indoor air pollution. Elemental iron plays an important role in the development of inflammation in humans via oxidative stress, so that the presence of metallic Fe in indoor dust can affect human health.

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“…Such a consequence of influence in practice is realized in the following stages: dust particles bunching, their interception, particulate control, air purification from dust particles and their dispersion in surface layer of the atmosphere [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Simulation of the dust suppression process with foam in the areas of belt conveyors

et al. 2017

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Abstract.The article provides the analysis of the physical essence and simulation of the process of dust retention with foam in the air of working zones of belt conveyors transporting sand, crushed stone, gravel, coal, grain. In accordance with the proposed physical-energy concept of simulation of the process of dust control its physical essence is in a deliberate sequential action on the dust particles with previously prepared by the parameters external (additional) dispersed systems. Use of dust retention technology foam method provides high efficiency of reducing the concentration of dust in the air of working areas of belt conveyors, which varies in the range of 85.0-99.0 %, which provides the standard level of dust contamination (MPC) in air of working areas of listed industrial sources of formation and emission of dust.

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The magnetic properties of indoor dust fractions as markers of air pollution inside buildings

Cited by 29 publications

References 36 publications

Influence of Land Use and Road Type on the Elemental Composition of Urban Dust in a Mexican Metropolitan Area

Influence of Land Use and Road Type on the Elemental Composition of Urban Dust in a Mexican Metropolitan Area

Magnetic study of a mixture of magnetite and metallic iron in indoor dust samples

Simulation of the dust suppression process with foam in the areas of belt conveyors

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