Investigating distribution patterns of airborne magnetic grains trapped in tree barks in Milan, Italy: insights for pollution mitigation strategies

Vezzola, L.C.; Muttoni, Giovanni; Merlini, Marco; Rotiroti, Nicola; Pagliardini, Luca; Hirt, Ann M.; Pelfini, Manuela

doi:10.1093/gji/ggx232

Cited by 11 publications

(10 citation statements)

References 44 publications

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“…Magnetic properties of tree leaves as biocarriers of the deposited atmospheric dust have been investigated in relation to air pollution by many authors (Hofman et al, 2017;Jordanova et al, 2010b;Jordanova et al, 2003;Kardel et al, 2018;Kardel et al, 2011;Kardel et al, 2012;Maher et al, 2008;Matzka and Maher, 1999;Mitchell and Maher, 2009;Mitchell et al, 2010;Moreno et al, 2003;Rodriguez-Germade et al, 2014;Sagnotti et al, 2009;Zhang et al, 2006). There are also numerous studies on magnetic properties of tree needles (Jordanova et al, 2010;Lehndorff et al, 2006;Urbat et al, 2004), tree barks, rings or branches (Brignole et al, 2018;Vezzola et al, 2017;Wuyts et al, 2018;Zhang et al, 2009;Zhang et al, 2008), lichens, in situ or transplanted (Chaparro et al, 2013;Kodnik et al, 2017;Marie et al, 2016;Marie et al, 2018;Paoli et al, 2017;Salo et al, 2012), and moss and transplanted moss bags (Fabian et al, 2011;Limo et al, 2018;Salo et al, 2012Salo et al, , 2016aSalo et al, , 2016bMakinen, 2014, 2019;Vukovic et al, 2015a;Vukovic et al, 2015b). High sensitivity of magnetic methods enabled even examination of magnetic properties of spider webs (Rachwal et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Negative correlation between concentration of iron oxides and particulate matter in atmospheric dust: case study at industrial site during smoggy period

Petrovský¹,

Kapicka²,

Grison³

et al. 2020

Preprint

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Background: Environmental magnetism, focusing on ferrimagnetic iron oxides, provides useful additional information on pollution of different environments. Magnetic methods have been applied to studies of atmospheric dust, namely PM10 (particulate matter smaller than 10 micrometers) in, e.g., industrial or urban areas. Until now, positive correlation was reported between concentration of iron oxides (expressed in terms of either magnetic susceptibility, saturation remanent or saturation induced magnetization) and concentration of PM10 or smaller. Purpose of this study was to verify the relationship between iron oxides and PM at monitoring site close to source of emissions rich in iron oxides during period of smoggy conditions. Results: We examined 24-hours PM10 and PM1 samples, collected during 10 days of smoggy winter period at a site close to steel plant, which represents a significant source of atmospheric emissions in industrial region of Northern Moravia (Czech Republic), known for generally high degree of air pollution. Magnetic hysteresis loops were measured in order to obtain parameters reflecting the concentration and grain-size distribution of iron oxides. Our data show unexpected negative correlation between saturation magnetization (concentration of ferrimagnetic iron oxides) and both PM1 and PM10 concentrations, to the best of our knowledge the trend not being reported yet. Conclusions: Our finding may seemingly disqualify magnetic methods as useful proxy in air pollution studies. However, we suggest that this is an exceptional case, specific to this region and monitoring site, as well as to synoptic conditions during the smoggy period. Although the significant dust emissions are presumably rich in iron oxides, the overall air quality at the monitoring site is determined by the general environment, controlled by many other sources of different character in the region, and by the specific climatic conditions. Thus, the nearby steel plant, presumably emitting dust rich in ferrimagnetic iron oxides, dominates the deposited dust at the nearby monitoring site only during very few days of suitable weather (namely wind speed and direction).

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Section: Introductionmentioning

confidence: 99%

Negative correlation between concentration of iron oxides and particulate matter in atmospheric dust: case study at industrial site during smoggy period

Petrovský¹,

Kapicka²,

Grison³

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…Magnetic properties of tree leaves as biocarriers of the deposited atmospheric dust have been investigated in relation to air pollution by many authors [5][6][7][8][9][10][11][12][13][14][15][16][17]. There are also numerous studies on magnetic properties of tree needles [18][19][20], tree barks, rings or branches [21][22][23][24][25][26], lichens, in situ or transplanted [27][28][29][30][31][32][33][34], and moss and transplanted moss bags [32,[35][36][37][38][39][40][41][42]. High sensitivity of magnetic methods enabled even examination of magnetic properties of spider webs [43].…”

mentioning

confidence: 99%

Negative correlation between concentration of iron oxides and particulate matter in atmospheric dust: case study at industrial site during smoggy period

et al. 2020

View full text Add to dashboard Cite

Background Environmental magnetism, focusing on ferrimagnetic iron oxides, provides useful additional information on pollution of different environments. Magnetic methods have been applied to studies of atmospheric dust, namely PM10 (particulate matter smaller than 10 µm) in, e.g., industrial or urban areas. Until now, positive correlation was reported between concentration of iron oxides (expressed in terms of either magnetic susceptibility, saturation remanent or saturation induced magnetization) and concentration of PM10 or smaller. Purpose of this study was to verify the relationship between iron oxides and PM at monitoring site close to source of emissions rich in iron oxides during period of smoggy conditions. Results We examined 24-h PM10 and PM1 samples, collected during 10 days of smoggy winter period at a site close to steel plant, which represents a significant source of atmospheric emissions in industrial region of Northern Moravia (Czech Republic), known for generally high degree of air pollution. Magnetic hysteresis loops were measured to obtain parameters reflecting the concentration and grain-size distribution of iron oxides. Our data show unexpected negative correlation between saturation magnetization (concentration of ferrimagnetic iron oxides) and both PM1 and PM10 concentrations, to the best of our knowledge the trend not being reported yet. Conclusions Our finding may seemingly disqualify magnetic methods as useful proxy in air pollution studies. However, we suggest that this is an exceptional case, specific to this region and monitoring site, as well as to synoptic conditions during the smoggy period. Although the significant dust emissions are presumably rich in iron oxides, the overall air quality at the monitoring site is determined by the general environment, controlled by many other sources of different character in the region, and by the specific climatic conditions. Thus, the steel plant, presumably emitting dust rich in ferrimagnetic iron oxides, dominates the deposited dust at the nearby monitoring site only during few days of suitable weather (namely wind speed and direction).

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“…Leaves of deciduous species are used for short-term monitoring of PM pollution in urban areas (Matzka and Maher, 1999;Jordanova et al, 2010;Mitchell et al, 2010;Kardel et al, 2011;Hansard et al, 2012;Sadeghian, 2012;Sant'Ovaia et al, 2012;Hofman et al, 2017;), while evergreen species are suitable for longer-term monitoring (e.g., 1-3 years) depending on the leaves' or needles' life-span (Moreno et al, 2003;Urbat et al, 2004). Tree-trunk cores are used for historical or long-term PM monitoring (Zhang et al, 2008;Vezzola et al, 2017). Kardel et al, (2011) found that deposition of PM on leaves mainly depends on leaf surface area and its surface characteristics.…”

Section: Plants Mosses and Lichens As Receptors For Pollutantsmentioning

confidence: 99%

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2020

BOL. SOC. GEOL. MEX.

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Investigating distribution patterns of airborne magnetic grains trapped in tree barks in Milan, Italy: insights for pollution mitigation strategies

Cited by 11 publications

References 44 publications

Negative correlation between concentration of iron oxides and particulate matter in atmospheric dust: case study at industrial site during smoggy period

Negative correlation between concentration of iron oxides and particulate matter in atmospheric dust: case study at industrial site during smoggy period

Negative correlation between concentration of iron oxides and particulate matter in atmospheric dust: case study at industrial site during smoggy period

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