Geochemical characterization of engineered coal-combustion byproducts (CCBs): Occurrence and mobility of trace elements, implications for interactions with acidic and ambient groundwater

The study of five soil profiles developed on carbonatic sediments of Tertiary Miocene origin has been carried out. The topography of the area was basically flat and the traditional uses of the soils are the cultivation of dry cereals and grapevine. The geochemical characterization of the aforementioned profiles involves a study of the contents of major and trace elements among other pedologic aspects (texture, pH, organic matter, etc.). The results of this study also indicate a superficial enrichment of trace elements due to the leaching of Ca and moderate biological and anthropic activity. We can consider strontium, Sr, as the trace element that characterizes these limy soils (435 mg/kg average content in total soil and 708 mg/kg in the original rock). These contents are similar to the average value in Castilla-La Mancha of 380 mg/kg and are higher than the average in world soils of about 200 mg/kg. High levels of dangerous or pollutant elements (Cd, Hg, Pb, Cu, Zn, or Ni) were not detected. The majority of trace element anomalies are related to calcareous material and the leaching of calcium carbonate (Ca), while the influence of the anthropogenic factor is secondary. Soil quality does not indicate toxicity although surficial enrichment suggests a weak threat from consuming crops.

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Geochemical characterization of arsenic-rich coal-combustion ashes buried under agricultural soils and the release of arsenic

Applied Geochemistry ◽

10.1016/j.apgeochem.2013.02.008 ◽

2013 ◽

Vol 33 ◽

pp. 153-164 ◽

Cited By ~ 8

Author(s):

Veronika Veselská ◽

Juraj Majzlan ◽

Edgar Hiller ◽

Katarína Peťková ◽

Ľubomír Jurkovič ◽

...

Keyword(s):

Coal Combustion ◽

Agricultural Soils ◽

Geochemical Characterization

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Mineralogical and geochemical characterization of palygorskite from Gabasa (NE Spain). Evidence of a detrital precursor

Clay Minerals ◽

10.1180/claymin.1996.031.1.03 ◽

1996 ◽

Vol 31 (1) ◽

pp. 33-44 ◽

Cited By ~ 24

Author(s):

A. Lopez-Galindo ◽

A. Ben Aboud ◽

P. Fenoll Hach-Ali ◽

J. Casas Ruiz

Keyword(s):

Trace Elements ◽

Rare Earth ◽

Statistical Analysis ◽

Geochemical Data ◽

Geochemical Characterization ◽

Early Oligocene ◽

Geochemical Study ◽

Playa Lake ◽

Ne Spain

AbstractA mineralogical and geochemical study of the Gabasa outcrop (Huesca, NE Spain) was undertaken. It consists of Early Oligocene marly and clayey fluvial and lacustrine (playa-lake) sediments. The phases detected were quartz, amorphous silica, calcite, dolomite, palygorskite, illite, interstratified illite-smectite, Al-smectite and Mg-smectite. The palygorskite expands with ethyleneglycol. Statistical analysis of the geochemical data shows that the rare earth elements and transition trace elements are basically associated with the detrital phyllosilicates, although a considerable amount of the latter is contained in the palygorskite (ΣREE = 60–70 ppm, Cr+Co+Ni+V+Zn+Cu = 120–150 ppm), in contrast to the normally low values for neoformed minerals. This fact, together with the significant presence of Al and Fe in the palygorskite, suggest genesis involving alteration by dissolution of the 2:1 structure of the illite and/or Al-smectite, followed by re-ordering in a fibrous structure.

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