| Autor: |
Petruzelkova, Anna, Machackova, Jirina, Wittlingerova, Zdenka, Zimova, Magdalena, Cidlinová, Anna, Bernath, Pavel |
| Předmět: |
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| Zdroj: |
Proceedings of the International Multidisciplinary Scientific GeoConference SGEM; 2012, Vol. 5, p735-742, 8p |
| Abstrakt: |
In the second half of 20th century chlorinated ethens (CE) were widely used as an industrial degreasers, cleaning detergents and extraction agents and therefore represent frequent groundwater contaminants in the Czech Republic (CR). The contamination of groundwater in the area of SAP Mimon factory and its surroundings by tetrachloroethylene (PCE) and its degradation products is one of the most extensive contamination of important waterwork's collector in CR and it has negative influence on surface water quality in the river Ploucnice. Site assessment started in this area in 1994. Intensive remediation groundwater pumping and new remediation techniques (air sparing and venting) started in 1997. Remediation with ozone has been initiated in 2008. The aim of our study was to determine influence of water contamination by PCE on PCE content in the muscles of fishes from the area of SAP Mimon and to asses the effectiveness of remediation technologies on PCE content in the surface water. 13 fish have been catched from two different localities (above and below the source of surface water contamination) in summer 2011 in area of SAP Mimon for PCE testing. Three different species were selected (Gobio gobio, Barbatula barbara and Leuciscus leuciscus) for assessment. PCE concentrations in muscles of fishes were measured by GC/ECD using Clarus 500 device. The obtained results were compared to the similar assessment performed in the same area in 1998. Positive content of PCE was detected in all fish samples from the locality below the source of water contamination (17-53 µg/kg, mean 27 µg/kg, seven samples analysed) in 2011. Only in two muscle samples from six fish from the locality above the source of water contamination had positive PCE detection (29 and 59 µg/kg, detection limit 10 µg/kg). The PCE contamination (30-140 µg/kg, mean 79 µg/kg) was higher in all samples from locality below the source of water contamination in the previous study in 1998 compared to the results from 2011. PCE content in surface water in period 1994 - 2012 in profile under the source indicates great improvement in surface water quality after clean-up commencement. Despite very low PCE contents of surface water fish tissues still have measurable contamination content which is not aliquot to surface water contamination decrease. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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