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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/2581

Title: A chemical and mineralogical reconstruction of Zn-smelter emissions in the Kempen region (Belgium), based on organic pool sediment cores
Authors: Sonke, Jeroen E.
Hoogewerff, Jurian A.
van der Laan, Sieger R.
Vangronsveld, Jaco
Issue Date: 2002
Publisher: ELSEVIER SCIENCE BV
Citation: SCIENCE OF THE TOTAL ENVIRONMENT, 292(1-2) (N° PII S0048-9697(02)00033-5). p. 101-119
Abstract: The atmospheric pollution history of a former Belgian Zn-smelter complex is preserved in organic sediments of a nearby peat bog pool. The stratigraphy of trace metals, Pb-isotope ratios and mineralogy indicate extreme heavy metal pollution in recent sediments. In the pollutant trend, extremes coincide with maxima in 20th century metal production, minima during major war conflicts and the final shutdown of the smelter, Peak pollution concentrations measure up to 4.7 wt.% Zn, 1.1 wt.% Pb and 0.1 wt.% Cd, which correspond to calculated atmospheric deposition rates of 9.0, 1.6 and 0.16 g m(-2) yr(-1), respectively. Pb-206/Pb-207 isotope ratios show higher values in the polluted interval (1.135-1.162) relative to local geogenic values deeper down-core (1.194-1.215). Within the polluted interval, three significantly different Pb-206/Pb-207 plateaus are recognized and suggested to indicate changes in the origins of processed ores. Microprobe analyses on sediment thin sections show extensive in situ FeS2 and ZnS precipitation, which suggests that anoxic processes are responsible for the immobilization of the atmospheric metal inputs. The occurrence of oxidized smelter dusts in an independent surface soil sample indicates a rapid diagenetic transformation of metal oxides into sulfides. Morphology and chemical characteristics allow the distinction between smelter related and diagenetic mineral deposits, and give evidence for dust from open-air ore repositories, as well as smelter operation without dust filters. (C) 2002 Elsevier Science B.V. All rights reserved.
Notes: Univ Utrecht, Inst Earth Sci, Geochem Div, Utrecht, Netherlands. Arsenal Res, Environm Div, A-1030 Vienna, Austria. Limburgs Univ Ctr, B-3610 Diepenbeek, Belgium.Sonke, JE, Natl High Magnet Field Lab, Geochem Div, 1800 E Paul Dirac Dr, Tallahassee, FL 32306 USA.
URI: http://hdl.handle.net/1942/2581
DOI: 10.1016/S0048-9697(02)00033-5
ISI #: 000176647500010
ISSN: 0048-9697
Category: A1
Type: Journal Contribution
Validation: ecoom, 2003
Appears in Collections: Research publications

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