Ten years of barium build-up in the Teign |
| |
| Institution: | 1. Center for Integrated Research on the Environment and Flathead Lake Biological Station, University of Montana;2. Department of Environmental Science, Policy & Management, University of California;1. LEAF - Linking Landscape, Environment, Agriculture and Food, School of Agriculture, University of Lisbon, Lisbon, Portugal;2. CEF - Forest Research Centre, School of Agriculture, University of Lisbon, Lisbon, Portugal;3. CERIS - Civil Engineering for Research and Innovation for Sustainability, Instituto Superior Técnico, University of Lisbon, Lisbon, Portugal;4. MARE - Marine and Environmental Sciences Centre, Faculty of Sciences and Technology, University of Coimbra, Coimbra, Portugal;5. WasserCluster Lunz – Inter-university Center for Aquatic Ecosystem Research, Lunz am See, Austria;6. Institute of Hydrobiology and Aquatic Ecosystem Management, Department of Water, Atmosphere and Environment, University of Natural Resources and Life Sciences, Vienna, Austria |
| |
| Abstract: | New analyses of <250 μm sediments from the river Teign, Devon, UK show spectacular increases of barium. In the middle river section levels are 1.5–3.5 times those obtained during a 1976 study. Although no mining has taken place in the region since the Bridford Baryte Mine closed in 1958, the former orefield is scattered with mine dumps, and some of these have been reworked since 1982. Catchment streams draining this mineralized area continue to supply sediments enriched with heavy metals to the Teign river. A peak value there reaches 12% Ba, largely in the form of barytes (BaSO4). By comparison, barium enrichment in the Teign estuary is modest. Small increases in the middle estuary may be significant, however, in a zone where both river- and marine-derived detritus is deposited. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
