The quality of sediment in shallow water bodies – Long-term screening of sediment in Czech Republic. A new perspective of nutrients and organic matter recycling in agricultural landscapes
| Autor: | Jan Pokorný, Marek Baxa, J. Sulcová, Jan Potužák, Lenka Kröpfelová |
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| Rok vydání: | 2019 |
| Předmět: |
Pollutant
chemistry.chemical_classification Cadmium Environmental Engineering chemistry.chemical_element Sediment 04 agricultural and veterinary sciences BTEX 010501 environmental sciences Management Monitoring Policy and Law 01 natural sciences Nutrient chemistry Volume (thermodynamics) Agricultural land Environmental chemistry 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Environmental science Organic matter 0105 earth and related environmental sciences Nature and Landscape Conservation |
| Zdroj: | Ecological Engineering. 127:151-159 |
| ISSN: | 0925-8574 |
| Popis: | The results of long-term screening of sediments from the Czech Republic from 2011 to 2017 are presented, more than 80% of the samples of which were taken from fishponds. The total sediment volume of Czech Republic fishponds is estimated to be 197 mil. m3. Quality of the sediment is impacted by numerous factors. Sediment may be used for land application, etc., as long as it abides with legislation limits. All results from our database, containing some 200 sites, have been compared with the Decree regulating the conditions for the application of sediments on agricultural land. We have evaluated toxic metals (As, Pb, Zn, Cu, Hg, Cd), organic pollutants (C10–C40, BTEX, PAH, PCB, DDT) and nutrient volume. The assessment of results reveal the average concentrations of evaluated metals to have the following ranking: Zn > Cu > Pb > As > Cd > Hg. The most frequent excesses of the limit listed in Decree No. 257/2009 Sb. were reported for cadmium (21 sites, i.e. 13.2%). In the case of organic pollutants, the worst pollutant exceeded the limits for 7.2% of sites. DDT volume values were all below the threshold. The ratio between available nutrients and overall nutrient volume was: 0.5% P; 1.3% N; 48.1% Na; 20.4% Mg; 5.8% K; and 65.7% Ca. |
| Databáze: | OpenAIRE |
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