Universität zu Köln

Foeldi, Corinna, Dohrmann, Reiner ORCID: 0000-0002-5416-9798 and Mansfeldt, Tim (2015). Volatilization of elemental mercury from fresh blast furnace sludge mixed with basic oxygen furnace sludge under different temperatures. Environ. Sci.-Process Impacts, 17 (11). S. 1915 - 1923. CAMBRIDGE: ROYAL SOC CHEMISTRY. ISSN 2050-7895

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Abstract

Blast furnace sludge (BFS) is awaste with elevated mercury (Hg) content due to enrichment during the production process of pig iron. To investigate the volatilization potential of Hg, fresh samples of BFSmixed with basic oxygen furnace sludge (BOFS; a residue of gas purification from steel making, processed simultaneously in the cleaning devices of BFS and hence mixed with BFS) were studied in sealed column experiments at different temperatures (15, 25, and 35 degrees C) for four weeks (totalHg: 0.178 mg kg(-1)). The systems were regularly flushed with ambient air (every 24 h for the first 100 h, followed by every 72 h) for 20 min at a flow rate of 0.25 +/- 0.03 L min(-1) and elemental Hg vapor was trapped on gold coated sand. Volatilization was 0.276 +/- 0.065 ng ((x) over bar (m): 0.284 ng) at 15 degrees C, 5.55 +/- 2.83 ng ((x) over bar (m): 5.09 ng) at 25 degrees C, and 2.37 +/- 0.514 ng ((x) over bar (m): 2.34 ng) at 35 degrees C. Surprisingly, Hg fluxes were lower at 35 than 25 degrees C. For all temperature variants, an elevated Hg flux was observed within the first 100 h followed by a decrease of volatilization thereafter. However, the background level of ambient air was not achieved at the end of the experiments indicating that BFS mixed with BOFS still possessed Hg volatilization potential.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Foeldi, Corinna UNSPECIFIED UNSPECIFIED UNSPECIFIED Dohrmann, Reiner UNSPECIFIED orcid.org/0000-0002-5416-9798 UNSPECIFIED Mansfeldt, Tim UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-415672
DOI:	10.1039/c5em00403a
Journal or Publication Title:	Environ. Sci.-Process Impacts
Volume:	17
Number:	11
Page Range:	S. 1915 - 1923
Date:	2015
Publisher:	ROYAL SOC CHEMISTRY
Place of Publication:	CAMBRIDGE
ISSN:	2050-7895
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MUNICIPAL SOLID-WASTE; AIRBORNE EMISSIONS; ZINC; SOILS; REMOVAL; STEEL; OPTIMIZATION; ABSORPTION; LANDFILLS; MOISTURE Multiple languages Chemistry, Analytical; Environmental Sciences Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/41567