Accumulation rates and mass calculations of Zn and Hg in recent sediments, Göta älv estuary, Sweden
| Autor: | L. T. Johannesson, Rodney L. Stevens, Karin Brack |
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| Rok vydání: | 2001 |
| Předmět: |
MERCURE
Hydrology Pollution geography geography.geographical_feature_category business.industry media_common.quotation_subject General Engineering Sewage chemistry.chemical_element Sediment Heavy metals Estuary Zinc Mercury (element) chemistry Environmental chemistry Earth and Planetary Sciences (miscellaneous) General Earth and Planetary Sciences Environmental Chemistry business General Environmental Science Water Science and Technology media_common |
| Zdroj: | Environmental Geology. 40:1232-1241 |
| ISSN: | 1432-0495 0943-0105 |
| Popis: | Sediment masses and heavy-metal accumulation rates for the recent deposits of the Gota alv estuary were calculated using a GIS. Total masses of 4,000 t Zn and >20 t Hg were recorded, of which 367 t Zn and >0.72 t Hg occur in the inner estuary, the Goteborg harbour, and 3,657 t Zn and 19 t Hg are in the outer estuary, suggesting a high trapping efficiency of the estuary. The accumulation rates are 5 g m–2 year–1 Zn and 0.01 g m–2 year–1 Hg in the harbour, and 1.5 g m–2/year–1 Zn and 0.007 g m–2 year–1 Hg in the outer estuary. The Zn and Hg accumulation rates are highest close to the outlet of a sewage treatment plant, and decrease by a factor of 5 for Zn, and a factor of 2 for Hg in the outer estuary. The accumulation rates in the outer estuary decrease after 1980 A.D. |
| Databáze: | OpenAIRE |
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