Heavy metal pollution and soil magnetic susceptibility in urban soil of Beni Mellal City (Morocco)

Baghdadi, Mohamed El; Barakat, Ahmed; Sajieddine, M.; Nadem, Samir

doi:10.1007/s12665-011-1215-5

Cited by 72 publications

(39 citation statements)

References 55 publications

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“…A link between χ and heavy metal contents is reported in many studies (e.g. El Baghdadi et al, 2011;Gautam et al, 2005;Heller et al, 1998;Karimi et al, 2011;Lourenço, 2003;Meena et al, 2011;Yang et al, 2011). The magnetic properties of soils proved to be suitable parameters, as they reflect the various degrees of contamination due to human activities and allow us to detect the area most affected by pollution.…”

Section: Introductionmentioning

confidence: 84%

Magnetic, geochemical and pedological characterisation of soil profiles from different environments and geological backgrounds near Coimbra, Portugal

et al. 2014

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This study presents an application of environmental magnetism techniques for the characterisation of the soils near Coimbra (central Portugal). Magnetic measurements, scanning electron microscopy and geochemical studies were carried out on samples collected in 6 soil profiles in order to find possible relationships and to interpret environmental implications. Magnetic susceptibility, saturation isothermal remanent magnetisation and isothermal remanent magnetisation at the backfield of 100 mT and 300 mT were measured. HardIRM %, SIRM/χ and S-ratios were also calculated. Polluted soils showed higher values of magnetic parameters in the superficial soil horizons closer to the roads, plants and urban areas. The lowest values were observed in the deeper horizons of the soil and in the areas least disturbed by human activity. The magnetic results also suggested that the magnetic signal of these soils is mainly influenced by ferrimagnetic magnetite-like minerals and with only a minor contribution from antiferromagnetic carriers (such as hematite minerals). In unpolluted soils, lithogenic contribution is reflected by the enhancement of magnetic susceptibility near parental rock material. Scanning electron microscope images of the topsoil samples revealed the presence of magnetic spherules typical of vehicular exhaust and combustion processes. This evidence suggests that the atmospheric deposition of fly ash is the main reason for the enhancement of the magnetic signal in the topsoil. Chemical analyses showed that the concentration of various heavy metals was higher than the mean background values for Portuguese soils, and higher in superficial soils. Heavy metals showed significant positive correlation with magnetic properties. The conclusions highlight the importance of using environmental magnetism methods and techniques in the evaluation process of soil evolution and pollution history throughout time.

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Section: Introductionmentioning

confidence: 84%

Magnetic, geochemical and pedological characterisation of soil profiles from different environments and geological backgrounds near Coimbra, Portugal

et al. 2014

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“…According to Baghdadi et al (2012), the lithogenic influence of magnetic susceptibility can be excluded by the significant enhancement of the topsoil susceptibility (3-7 cm depth), which is about four and two times higher than that of the subsoil. This fact does not occurs in the soil profile developed on basalt, suggesting that lithology represents the primary effect on soil magnetic properties (Fialová et al, 2006).…”

Section: Soil Magnetic Measurementsmentioning

confidence: 99%

Magnetic susceptibility and the spatial variability of heavy metals in soils developed on basalt

Cervi

Costa

Souza

2014

Journal of Applied Geophysics

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“…Positive correlations between the magnetic susceptibility and heavy metals concentration have been reported in literature (e.g. Blaha et al, 2008;Chaparro et al, 2008;Rosowiecka and Nawrocki, 2010;El Baghdadi et al, 2011). However, better correlations are found between heavy metals contents and remanent parameters.…”

Section: Figmentioning

confidence: 75%

“…Several studies report a positive correlation between levels of toxic elements and high values of magnetic susceptibility (e.g. Heller et al, 1998;Lourenço, 2003;Gautam et al, 2005;El Baghdadi et al, 2011;Karimi et al, 2011;Meena et al, 2011;Yang et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Relationships between magnetic parameters, chemical composition and clay minerals of topsoils near Coimbra, central Portugal

Lourenço

Rocha

Gomes

2012

Nat. Hazards Earth Syst. Sci.

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Abstract. Magnetic measurements, mineralogical and geochemical studies were carried out on surface soil samples in order to find possible relationships and to obtain environmental implications. The samples were taken over a square grid (500 × 500 m) near the city of Coimbra, in central Portugal. Mass specific magnetic susceptibility ranges between 12.50 and 710.11 × 10 −8 m 3 kg −1 and isothermal magnetic remanence at 1 tesla values range between 253 and 18 174 × 10 −3 Am −1 . Chemical analysis by atomic absorption spectrometry shows that the concentration of various toxic elements was higher than the mean background values for world soils. Higher values of susceptibility and toxic elements content were reported near roads and rivers. Urban pollution and road traffic emission seem to be the main influence for these values. A semi-quantitative X-ray diffraction study has been carried out on a representative set of subsamples, using peak areas. Illite (average 52 %), kaolinite (average 55 %), chlorite (average 6 %) and irregular illite-smectite mixed-layers (average 9 %) are the major clay minerals groups identified. Mineral composition of total fraction confirms the presence of magnetite/maghemite. The clay minerals results point to a contrast in the behavior of the main clay minerals: illite, chlorite, and kaolinite (also, smectite in some samples), which are generally in agreement with the magnetic and geochemical data. The results showed that magnetic measurements are a sensitive, fast, inexpensive and robust method, which can be advantageously applied for studying soils affected by urban and road pollution.

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Heavy metal pollution and soil magnetic susceptibility in urban soil of Beni Mellal City (Morocco)

Cited by 72 publications

References 55 publications

Magnetic, geochemical and pedological characterisation of soil profiles from different environments and geological backgrounds near Coimbra, Portugal

Magnetic, geochemical and pedological characterisation of soil profiles from different environments and geological backgrounds near Coimbra, Portugal

Magnetic susceptibility and the spatial variability of heavy metals in soils developed on basalt

Relationships between magnetic parameters, chemical composition and clay minerals of topsoils near Coimbra, central Portugal

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