Rock magnetic, mineralogical and microstructural characterization of fly ashes from Bulgarian power plants and the nearby anthropogenic soils

Veneva, L.; Hoffmann, V.; Jordanova, Diana; Jordanova, Neli; Fehr, Th.

doi:10.1016/j.pce.2004.03.011

Cited by 57 publications

(40 citation statements)

References 26 publications

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“…Although the wt% MF in samples from the storage cell is low (<2%), the amplitudes of v LF and ARM in Emory and Clinch River samples are, respectively, 2-56 times and 3-16 times greater than the watershed reference samples, allowing detection of Kingston ash mixed with watershed sediment. Other studies of samples collected from electrostatic precipitators report a range from 2 to 16 wt% MF within bulk coal ash samples [17,22]. Reworking by the Emory River increased the wt% MF to $3% over 2.7 km of transport (Fig.…”

Section: Discussionmentioning

confidence: 81%

Characterization of coal ash released in the TVA Kingston spill to facilitate detection of ash in river systems using magnetic methods

Cowan

Gaspari

Brachfeld

et al. 2015

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h i g h l i g h t sKingston coal ash increases magnetic susceptibility of riverbed sediment. Fluvial transport both enriches and dilutes the magnetic fraction of coal ash. Micron-size magnetite and maghemite occur within aluminosilicate spheres. Magnetospheres dominate the magnetic signal in the Watts Bar watershed. a b s t r a c tThe magnetic properties of riverbed samples collected after the 2008 Tennessee Valley Authority (TVA) coal ash spill in Kingston, Tennessee are investigated. Coal ash persists in this fluvial environment because 400,000 m 3 of ash remains in areas that were not dredged. The magnetic fraction is low in comparison to other coal ash; 1.4 wt% in a sample from the failed ash storage cell increasing to 3.0 wt% in riverbed samples in the Emory River near the spill. Thermomagnetic analysis, XRD, SEM and polarized light microscopy identified magnetospheres with magnetite and maghemite from the Kingston coal ash as the magnetic carrier. Anthropogenic nonspherical magnetic particles are introduced from the industrialized Tennessee River watershed prior to reaching the Watts Bar Reservoir. A bivariate plot of anhysteretic remanent magnetization (ARM) versus mass-normalized low field magnetic susceptibility (v LF ) models the mixing of ash in the rivers, identifying both enrichment of magnetospheres by sorting near the spill and dilution with native sediment downstream. Concentration-dependent magnetic parameters in ash-bearing samples are approximately 2-56 times stronger than those of the ash-free watershed samples. This study supports the use of magnetic parameters to track the ash as it is eroded and transported 71 km downstream to the Watts Bar Dam and suggests that v LF can be utilized to track the migration of coal ash in other river systems.

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Section: Discussionmentioning

confidence: 81%

Characterization of coal ash released in the TVA Kingston spill to facilitate detection of ash in river systems using magnetic methods

Cowan

Gaspari

Brachfeld

et al. 2015

Fuel

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“…Consequently, the presence of TMPs in topsoil (mainly in the organic horizon) is considered an indicator for heavy metal soil pollution. This fact was confirmed by many authors (Veneva et al 2004;Klose and Makeschin 2005;Spiteri et al 2005;Blaha et al 2008;Jordanova et al 2008;Lu et al 2008;Magiera et al 2008;Bućko et al 2011). Soil with natural plant cover, particularly forest soil, is often used as a target for magnetic susceptibility studies because it exhibits the stratigraphic sequence of the depositing dusts in undisturbed soil horizons for a long time.…”

Section: Introductionmentioning

confidence: 83%

The influence of the wind direction and plants on the variability of topsoil magnetic susceptibility in industrial and urban areas of southern Poland

2016

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Volume magnetic susceptibility (j) was measured on the soil surface and in the vertical topsoil profile within a 300 km 2 area located in an urban-industrial conurbation. The results were compared to plant species compositions in the forest storeys, elevation above sea level, and terrain geomorphology. The content and mineral composition of the magnetic fraction were determined in the soil horizons. It was found that the extent of the area with enhanced topsoil magnetic susceptibility was similar to the dominant wind direction (south-west). Enhanced j values were observed for the soil at the forest margin on the leeward side of the emitters as well as at sites located on exposed local elevations (C10 m). There were no significant correlations between species composition of the forest stand and soil surface j value (measured both with and without forest litter). Soil covered with deciduous treesmostly ash (Fraxinus excelsior L.)-demonstrated higher j values than soil under coniferous tree species. However, our results suggest that this parameter is not controlled by individual tree species, but rather depends on distance from emission sources, intensity of magnetic particle emission, and meteorological conditions (prevailing wind directions and dynamics).

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“…With the development of modern industry, iron and steel production, metal smelters, and coal-fired power plants are important functions in our society, but they also produce considerable amounts of pollutants including toxic heavy metals, which badly pollute ambient soil environment by accumulating, enriching and migrating in soil [1,2] . Previous studies have shown that they also contain magnetic particles going with heavy metals bringing on the soil pollution, so it is possible to use magnetic methods to study the industrial pollution [3,4] .…”

Section: Introductionmentioning

confidence: 99%

A Magnetic Study of a Polluted Soil Profile at the Shijingshan Industrial Area, Western Beijing, China

Shen

Blaha

et al. 2006

Chinese J. Geophys.

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A soil profile of 74 cm length was sampled in the hillside close to Beijing Muslim's cemetery, which is located in the Yingshan Forest Park near the Shijingshan industrial area. Coal-fired power plants, a steel mill, and a cement factory are located close to the sampling site. Gray-black pollutants can be found within the uppermost part of the soil. Magnetic measurements, grain size and geochemical analysis, as well as multivariate statistics were performed. Magnetic proxies show similar trends compared to heavy metal elements with higher concentrations at the top and lower concentrations in the lower part. The anthropogenic dust input from industrial activity is the predominant cause for strong magnetic signals in the uppermost soil horizon (0∼3 cm). The main magnetic component is magnetite contained in the grain size fractions of 4∼16µm and 16∼32µm. These pollutants are observed up to about 10 cm depth. Below 10 cm, there is little pollution in soil with lowest concentration of magnetic minerals and heavy metals comparable to natural background values. Multivariate statistics and fuzzy C-means cluster analysis show positive correlation of χ, ARM, SIRM and Mn, Cu, Fe, Pb, Zn, Al, Sr. Based on the results, it can be concluded that magnetic parameters can be used as a sensitive indicator for screening heavy metal pollution.

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Rock magnetic, mineralogical and microstructural characterization of fly ashes from Bulgarian power plants and the nearby anthropogenic soils

Cited by 57 publications

References 26 publications

Characterization of coal ash released in the TVA Kingston spill to facilitate detection of ash in river systems using magnetic methods

Characterization of coal ash released in the TVA Kingston spill to facilitate detection of ash in river systems using magnetic methods

The influence of the wind direction and plants on the variability of topsoil magnetic susceptibility in industrial and urban areas of southern Poland

A Magnetic Study of a Polluted Soil Profile at the Shijingshan Industrial Area, Western Beijing, China

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