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Magnetic susceptibility mapping and rock magnetic characterization of topsoils from southeastern Bulgaria near the Black sea coast was carried out for delineation of the anthropogenic pollution. The presence of strongly magnetic parent material (volcanites, volcanoclastic sediments) and various soil types (Vertisols, Luvisols, Chromic Cambisols, Planosols, Fluvisols) were taken into account by using normalization of the field susceptibilities to the median susceptibility value, calculated separately for each soil ...

Qualitative picture of the degree of environmental pollution in Sofia city was obtained using magnetic signature of road dust. Collection of 117 samples was studied by magnetic methods and SEM microscopy. The most polluted points are central part of the city and main crossroads. Both irregular-shaped and spherical particles of high-iron content are responsible for the enhanced magnetic signal in the road dust.

Magnetism of soils is determined by the amount of strongly magnetic minerals, which may have different origin – inherent from the parent rocks (lithogenic); “in situ” formed during pedogenesis (pedogenic) and anthropogenic – from atmospheric deposition of particulates emitted from various industrial productions, which together with heavy metals contain also magnetic fraction. Due to the latter contribution, magnetic susceptibility of strongly polluted topsoils is significantly higher than the signal of non...