The magnetic properties of particles deposited on Platanus x hispanica leaves in Madrid, Spain, and their temporal and spatial variations

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

“…Tree barks are preferred to the more frequently used tree leaves (e.g. Matzka & Maher 1999;Hanesch et al 2003;Moreno et al 2003;Lehndorff et al 2006;McIntosh et al 2007;Maher et al 2008;Szönyi et al 2008), because they accumulate airborne PM the entire year. This is important because PM pollution levels are highest in the winter, when leaves of deciduous species, which are dominant in Milan, are absent.…”

Weekly cycle of magnetic characteristics of the daily PM2.5 and PM2.5–10 in Beijing, China

“…It can efficiently identify the magnetic domain status, such as multidomain (MD, >100 nm), pseudo-single domain (PSD, >100 nm, PSD grains exhibit magnetic behaviors similar to SD grains), single domain (SD,~30e100 nm), and superparamagnetism (SP, <25e30 nm) for the magnetite (Hu et al, 2013). The magnetic properties of the PM have increasingly been used to assess air pollution level and identify pollution sources, because magnetic particles in urban environments are mainly derived from fuel combustion, industry, vehicle emission, and/or abrasion/corrosion anthropogenic sources (Olson and Skogerboe, 1975;Gillies and Gertler, 2000;Urbat et al, 2004;Maher et al, 2008;Zhang et al, 2008;Rai, 2013;Warrier et al, 2014), and are closely related to trace chemical pollutants (e.g., NO x , CO, SO 2 , Cu, Zn) (Muxworthy et al, 2001;Gautam et al, 2005;McIntosh et al, 2007;Qiao et al, 2013). The mass magnetic susceptibility and saturation isothermal remanent magnetization analyses of magnetic particles are suggested as alternative proxies for monitoring atmospheric pollution (Moreno et al, 2003;Kardel et al, 2012).…”

Magnetic records of heavy metal pollution in urban topsoil in Lanzhou, China

“…Environmental magnetism has become one of the main focuses of current research in pollution history reconstruction, monitoring the present environmental pollution, and tracing and separating the sources of pollution. The atmosphere [18][19][20][21], street dustfall [22][23][24][25], soil [1][2][3][4][5][6][7][8][9][10][11], sediment [12][13][14], leaves [26][27][28][29] and tree rings [30] are usually used as the research targets. Analysis is developed from a single Wang B, et al Chin Sci Bull January (2013) Vol.58 No.3 385 pollution source to multiple pollution sources and multivariate data analysis, and in some studies semi-quantitative models are created.…”