Universität zu Köln

Foeldi, Corinna, Andree, Corlin-Anna and Mansfeldt, Tim (2015). Sequential extraction of inorganic mercury in dumped blast furnace sludge. Environ. Sci. Pollut. Res., 22 (20). S. 15755 - 15763. HEIDELBERG: SPRINGER HEIDELBERG. ISSN 1614-7499

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Abstract

Blast furnace sludge (BFS) is an industrial waste with elevated mercury (Hg) contents due to the enrichment during the production process of pig iron. To investigate the potential pollution status of dumped BFS, 14 samples with total Hg contents ranging from 3.91 to 20.8 mg kg(-1) from five different locations in Europe were sequentially extracted. Extracts used included demineralized water (fraction 1, F1), 0.1 mol L-1 CH3COOH+0.01 mol L-1 HCl (F2), 1 mol L-1 KOH (F3), 7.9 mol L-1 HNO3 (F4), and aqua regia (F5). The total recovery ranged from 72.3 to 114 %, indicating that the procedure was reliable when adapted to this industrial waste. Mercury mainly resided in the fraction of elemental Hg (48.5-98.8 %) rather being present as slightly soluble Hg species associated with sludge particles. Minor amounts were found as mercuric sulfide (F5; 0.725-37.3 %) and Hg in crystalline metal ores and silicates (F6; 2.21-15.1 %). The ecotoxically relevant fractions (F1 and F2) were not of significance (F1, <limit of quality; F2, 0.509-9.61 %, n=5). Thus, BFS dumped for many years has a rather low environmental risk potential regarding Hg.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Foeldi, Corinna UNSPECIFIED UNSPECIFIED UNSPECIFIED Andree, Corlin-Anna UNSPECIFIED UNSPECIFIED UNSPECIFIED Mansfeldt, Tim UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-390964
DOI:	10.1007/s11356-015-4781-3
Journal or Publication Title:	Environ. Sci. Pollut. Res.
Volume:	22
Number:	20
Page Range:	S. 15755 - 15763
Date:	2015
Publisher:	SPRINGER HEIDELBERG
Place of Publication:	HEIDELBERG
ISSN:	1614-7499
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language COAL FLY-ASH; MOBILITY; REMOVAL; ZINC; SLAG Multiple languages Environmental Sciences Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/39096