Mobility and toxicity of metals in sandy sediments deposited on land
| Autor: | Colin R. Janssen, Zbynek Prokop, M Vangheluwe, Ivan Holoubek, P Van Sprang |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Geologic Sediments
Water flow Health Toxicology and Mutagenesis 0211 other engineering and technologies Biological Availability chemistry.chemical_element 02 engineering and technology 010501 environmental sciences 01 natural sciences Deposition (geology) Lethal Dose 50 Metals Heavy Water Movements Animals Soil Pollutants Water Pollutants Organic matter Leaching (agriculture) 0105 earth and related environmental sciences chemistry.chemical_classification 021110 strategic defence & security studies Cadmium Chemistry Ecology Public Health Environmental and Occupational Health Sediment Lessivage General Medicine Hydrogen-Ion Concentration Invertebrates Pollution Soil contamination 6. Clean water 13. Climate action Environmental chemistry |
| Zdroj: | Ecotoxicology and Environmental Safety. 54:65-73 |
| ISSN: | 0147-6513 |
| DOI: | 10.1016/s0147-6513(02)00022-2 |
| Popis: | A times series of laboratory experiments were conducted to investigate the effect of land deposition of contaminated sediments on the bioavailability and mobility of metals. Four sandy sediments were sampled at sites expected to have elevated levels of cadmium and zinc. The physical and chemical characteristics and ecotoxicity of sediments, pore waters, and leachates were evaluated after periods ranging from 1 to 45 days of land deposition. Cd and Zn retardation and leaching potential were calculated and this simulation gave good predictions of subsequently observed Cd and Zn mobility. The mobility and leaching of Cd and Zn in the sediments increased with decreasing pH and with decreasing content of organic matter. During the deposition an increase in sediment toxicity to plants and an increase in eluate toxicity to invertebrates were observed. A high rate of water flow through the sediment resulted in a lower toxicity enhancement of the sediments and a higher toxicity enhancement of the eluates. This result suggests that water flow through the sediment reduces the actual toxicity of the upper layer of deposited sediment but at the same time intensifies the risk of groundwater contamination. |
| Databáze: | OpenAIRE |
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