Can the application of farm dairy effluent enhance cadmium leaching from soil?
| Autor: | Jo-Anne E. Cavanagh, Colin W. Gray, Gina Lucci |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Cadmium
Farms Health Toxicology and Mutagenesis chemistry.chemical_element Soil classification General Medicine engineering.material complex mixtures Pollution Soil chemistry Lysimeter Environmental chemistry Soil water Dissolved organic carbon engineering Soil Pollutants Environmental Chemistry Fertilizer Leaching (agriculture) Fertilizers Effluent |
| Zdroj: | Environmental Science and Pollution Research. 28:50919-50929 |
| ISSN: | 1614-7499 0944-1344 |
| DOI: | 10.1007/s11356-021-15513-x |
| Popis: | The application of amendments such as farm dairy effluent (FDE) to soils which contain dissolved organic carbon (DOC) has the potential to increase cadmium (Cd) leaching through the formation of soluble organo-Cd complexes. However, the extent of Cd leaching loss is currently unknown. A lysimeter study measured Cd leaching from coarse and fine-textured Pumice soils amended with either FDE or single superphosphate (SSP) fertilizer. Results showed that despite FDE having a DOC concentration of 3000 mg L-1, concentrations in drainage were low (7.2 to 14.6 mg DOC L-1), probably reduced by microbes and/or sorption onto iron and aluminium oxides in the soil. As a result, there was no significant difference in the amount of Cd lost from the soil amended with FDE (0.79 g ha-1) or SSP (0.70 g ha-1). In comparison, greater amounts of Cd were lost from the fine-textured (0.92 g ha-1) than from the coarse-textured soil (0.57 g ha-1), primarily due to significantly higher Cd concentrations in drainage. The study indicates that a one-off application of FDE at the maximum rate allowed by regulators is unlikely to affect Cd leaching losses, although this still should be confirmed for other soil types that receive FDE. |
| Databáze: | OpenAIRE |
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