Universität zu Köln

Rennert, Thilo ORCID: 0000-0003-1435-2157, Kaufhold, Stephan ORCID: 0000-0002-9945-5253, Haendel, Matthias, Schuth, Stephan, Meissner, Sylvia and Totsche, Kai U. (2011). Characterization of a Technosol developed from deposited flue-dust slurry and release of inorganic contaminants. J. Plant Nutr. Soil Sci., 174 (5). S. 721 - 732. MALDEN: WILEY-BLACKWELL. ISSN 1436-8730

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Abstract

A flue dust originaly enriched in metal sulfides evolved as a by-product of Cu smelting. The dust was deposited as slurry in unsealed heaps. It is characterized by very high contents of toxic metals such as Pb and Zn. The slurry is a source of soil, sediment, and water contamination. We studied a Technosol profile developed from deposited flue-dust slurry by means of chemical and mineralogical characterization (SEM-EDX, XRD, FTIR, DTA-MS, XRF, Pb isotopes), by open-flow and closed-flow column experiments on contaminant release under water-saturated conditions, and by geochemical modeling to evaluate release processes and to quantify aqueous contaminant concentrations. Besides ash particles and quartz, the flue-dust slurry contains Fe oxides, silicates, sulfates, and sulfides (in varying states of weathering). In both column approaches, metal concentrations exceed inspection values. The concentration patterns in both experimental column approaches indicate near-equilibrium mineral dissolution. Geochemical modeling reveals partial dissolution of sulfates and precipitation of secondary carbonates. Their precipitation prevents complete sulfate dissolution, which would have led to even higher aqueous metal concentrations and contaminant export. The combination of detailed material characterization, column experiments, and modeling allows for quantitative and qualitative estimation of contaminant release into the soil solution.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Rennert, Thilo UNSPECIFIED orcid.org/0000-0003-1435-2157 UNSPECIFIED Kaufhold, Stephan UNSPECIFIED orcid.org/0000-0002-9945-5253 UNSPECIFIED Haendel, Matthias UNSPECIFIED UNSPECIFIED UNSPECIFIED Schuth, Stephan UNSPECIFIED UNSPECIFIED UNSPECIFIED Meissner, Sylvia UNSPECIFIED UNSPECIFIED UNSPECIFIED Totsche, Kai U. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-487614
DOI:	10.1002/jpln.201000345
Journal or Publication Title:	J. Plant Nutr. Soil Sci.
Volume:	174
Number:	5
Page Range:	S. 721 - 732
Date:	2011
Publisher:	WILEY-BLACKWELL
Place of Publication:	MALDEN
ISSN:	1436-8730
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MINING DISTRICT; FRACTIONATION; GERMANY; ISOTOPE Multiple languages Agronomy; Plant Sciences; Soil Science Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/48761