| Autor: |
Faragó, Tomáš, Sekula, Peter, Ušiaková, Monika, Jurkovič, Ľubomír, Peťková, Katarína |
| Předmět: |
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| Zdroj: |
Proceedings of the International Multidisciplinary Scientific GeoConference SGEM; 2016, Vol. 1, p637-643, 7p |
| Abstrakt: |
This work is focused on the use of soil water samplers (lysimeters) by ex-situ study of the mobilization of contaminants (heavy metals) in technosols of Zemianske Kostoľany area. This area is the most polluted area in Slovakia, where in 1965 a dam failure of a coal ash impoundment released cca. 3 million m3 of power plant fly ash with a high content of arsenic and other potentially toxic trace elements in the surrounding environment. Under the new morphogenetic classification system we call the soil with a layer of power plant ash as technosol. The total content of arsenic (AsTOT) in the studies samples is in the range of 109.65-1334.37 ppm. Mobility of arsenic in the anthropogenic materials was studied by sampling of pore waters using soil lysimeters (Prenart Equipment ApS, DK).The collected soil samples without homogenization and sieving (better simulation of natural conditions) were placed in experimental containers in which there were installed soil lysimeters. The aim of ex-situ experiments was to assess the mobility of toxic elements from solid samples using the selected leaching solutions (glucose+SAB medium, 1 mM citric acid, simulated acid rainwater) and compare their efficiency. From the results obtained we can find that the strongest extractant was the solution of glucose + SAB (Sabouraud) medium - which increases the activity of soil microflora - that producing organic acids play an important role in the environmental fate of contaminants in soils. Preliminary results (two 5-day cycles) obtained from leaching experiments confirmed that the stimulation of soil microorganisms (biostimulation) was the most effective method and the result represents the basis for innovative methods for soil remediation in Zemianske Kostoľany area. That method wasn't sufficiently effective for the mobilization of other contaminants (Pb, Cd, Zn) - the results were insignificant. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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