Use of dredged sediments on agricultural soils from viewpoint of potentially toxic substances
Vacha, R.,Vyzkumny Ustav Melioraci a Ochrany Pudy, Prague (Czech Republic) | Cechmankova, J.,Vyzkumny Ustav Melioraci a Ochrany Pudy, Prague (Czech Republic) | Skala, J.,Vyzkumny Ustav Melioraci a Ochrany Pudy, Prague (Czech Republic) | Hofman, J.,Masarykova Univ., Brno (Czech Republic). Prirodovedecka Fakulta | Cermak, P.,Ustredni Kontrolni a Zkusebni Ustav Zemedelsky, Brno (Czech Republic) | Sanka, M.,Masarykova Univ., Brno (Czech Republic). Fakulta Socialnich Ved | Vachova, T.,Karlova Univ., Prague (Czech Republic). Prirodovedecka Fakulta
Samples of 29 pond sediments were collected and separated into three groups as follows: field, village, and forest pond sediments. The sediment samples were taken from pond bottoms and sediment heaps. The sediment characteristics (pH, CEC, Al-exchangeable, Cox, humus substances), the content of potentially toxic elements and persistent organic pollutants were analysed in the sediments and compared between sediment groups. The comparison of sediment contamination with Czech legislation for sediment use in agriculture was conducted. The village sediments were more loaded by potentially toxic elements and persistent organic pollutants than the other two types of sediments. The pH value of sediments was considered as the properties regulating the retention of potentially toxic elements and their mobility (Al, Cd, Zn). Polycyclic aromatic hydrocarbons (PAHs) were the most problematic POPs group in the sediments. The correlation showed poor dependency of POPs (especially PAHs) content on the content and quality of sediment organic matter.
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