Mercury in dumped blast furnace sludge - Kölner UniversitätsPublikationsServer

Foeldi, Corinna, Dohrmann, Reiner ORCID: 0000-0002-5416-9798 and Mansfeldt, Tim (2014). Mercury in dumped blast furnace sludge. Chemosphere, 99. S. 248 - 254. OXFORD: PERGAMON-ELSEVIER SCIENCE LTD. ISSN 1879-1298

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DOI:10.1016/j.chemosphere.2013.11.007

Abstract

Blast furnace sludge (BFS) is a waste generated in the production of pig iron and was dumped in sedimentation ponds. Sixty-five samples from seven BFS locations in Europe were investigated regarding the toxic element mercury (Hg) for the first time. The charge material of the blast furnace operations revealed Hg contents from 0.015 to 0.097 mg kg(-1). In comparison, the Hg content of BFS varied between 0.006 and 20.8 mg kg(-1) with a median of 1.63 mg kg(-1), which indicates enrichment with Hg. For one site with a larger sample set (n = 31), Hg showed a stronger correlation with the total non-calcareous carbon (C) including coke and graphite (r = 0.695; n = 31; p < 0.001). It can be assumed that these C-rich compounds are hosting phases for Hg. The solubility of Hg was rather low and did not exceed 0.43% of total Hg. The correlation between the total Hg concentration and total amount of NH4NO3-soluble Hg was relatively poor (r = 0.496; n = 27; p = 0.008) indicating varying hazard potentials of the different BFS. Finally, BFS is a mercury-containing waste and dumped BFS should be regarded as potentially mercury-contaminated sites. (C) 2013 Elsevier Ltd. All rights reserved.

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