Source term characterisation using concentration trends and geochemical associations of Pb and Zn in river sediments in the vicinity of a disused mine site: Implications for contaminant metal dispersion processes
| Autor: | Angus B. MacKenzie, Laura Hastings, Shane Donatello, Ian D. Pulford |
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| Rok vydání: | 2009 |
| Předmět: |
Pollution
Geologic Sediments Health Toxicology and Mutagenesis media_common.quotation_subject Sorting (sediment) Industrial Waste Fractionation Toxicology Dispersion (geology) Mining chemistry.chemical_compound Rivers Soil Pollutants Aqua regia Water pollution media_common Hydrology Sediment General Medicine Zinc Lead Scotland chemistry Environmental chemistry Environmental science Water quality Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Environmental Pollution. 157:1649-1656 |
| ISSN: | 0269-7491 |
| DOI: | 10.1016/j.envpol.2008.12.018 |
| Popis: | River sediment at a disused lead–zinc mine was analysed to provide an understanding of the chemical nature of the source term for contaminated sediment exported from the site. Changes in concentration and geochemical associations of Pb and Zn were measured using aqua regia digestion and the BCR sequential extraction procedure. Sediment in the immediate vicinity of the mine was highly contaminated with Pb (max. c. 11,000 mg kg −1 ) and Zn (max. c. 30,000 mg kg −1 ), but these values declined rapidly within 1 km of the mine due to dilution and hydraulic sorting. Lead fractionation changed from being predominantly in the reducible fraction to being in the acetic acid-extractable fraction, whereas Zn was predominantly in the residual fraction. This material is transported as fine sediment in the river system. |
| Databáze: | OpenAIRE |
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