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1

Different approaches in using and understanding the term 'geochemical background' - practical implications for environmental studies

100%
Galuszka A.
Polish Journal of Environmental Studies
|
2007
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tom 16
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nr 3
389-395
This article presents various aspects of the use and evaluation of geochemical background for different environmental media with a brief discussion on the origins, historical and present context, and application of this and other related terms. This subject has become one of the most crucial issues in geochemistry and environmental sciences during the last few years because of its application to environmental protection, land management, ecotoxicology and geochemistry. Three approaches (methods) of geochemical background evaluation are discussed: (i) direct, (ii) indirect, and (iii) integrated. In response to a strong need to reduce a large number of methods applied to background assessment, a plausible methodology based on archival data, including the results derived from determinations of Mn, Pb, Zn for quartzites, soils and Pinus sylvestris needles, from the Holy Cross Mountains (Świętokrzyskie Mountains, south-central Poland) has been proposed. This methodology belongs to the integrated approach to the background evaluation. Samples were collected in relatively pristine areas and statistical data analysis (iterative 2σ-technique) was used to eliminate outliers from the original datasets.
2

The evaluation of Cr, Ni, Cu, and Co contents in bottom sediments of the Suprasl River and its tributaries

80%
Skorbilowicz E., Skorbilowicz M.
Oceanological and Hydrobiological Studies
|
2008
|
tom 37
|
nr 3
87-95
3
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Content of Cu, Zn and Mn in the eroded soils of a small arable-forest catchment of West Pomerania [The Chojna District]

80%
Chudecka J.
Acta Agrophysica
|
2001
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tom 51
The aim of this paper was to assess differentiation in the total content of Cu, Zn and Mn under the influence of water erosion. The present author investigated parent material, eroded soils and delluvial sediments of a small arable-forest catchment of the moraine zone in West Pomerania. The average content of heavy metals in the parent rock (boulder light loam) were assumed as geochemical backgrounds of Cu, Zn and Mn. It was found out that erosion process caused differentiation in heavy metals. Zinc was the most mobile in this transportation; Mn was not sensitive to it. Delluvial sediments from arable (drainage) depressions had a clearly lower content of Cu and Zn than the parent material. It was also noted that Cu and Zn content in the forest area was lower than in the arable area of a similar relief and soil composition. Mn content was always higher in the arable soils. Soil-forming processes influenced differentiation of heavy metals in the vertical soil profile. The humus and Bt horizons (accumulation of silicate clay) were enriched with heavy metals. A decrease of heavy metal content was noticed in the eluvial horizon (Eet - outwash of silicate clay). The humus horizon of the investigated soil had, a natural (not increased) content of Cu, Zn and Mn.
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