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The leaching behaviour of lead metallurgical slag in high-molecular-weight (HMW) organic solutions

V. Ettler, J. Jehlicka, V. Masek and J. Hruska
The leaching behaviour of lead metallurgical slag in high-molecular-weight (HMW) organic solutions (in Speciation and toxicity, K. Hudson-Edwards (prefacer) and M. E. Hodson (prefacer))
Mineralogical Magazine (October 2005) 69 (5): 737-747

Abstract

The reactivity of primary Pb metallurgical slags in high-molecular-weight (HMW) organic solutions has been studied in order to determine the processes of release and attenuation of metal and metalloid contaminants (Pb, Zn, Cu, As) in "soil-like" environments. Slag was submitted to a 112-day batch leaching experiment in Suwannee River fulvic acid solution and peat water (approximately 50 mg DOC l (super -1) ). The leaching was coupled with investigation of the secondary phases (SEM/EDS, Raman microspectrometry) and thermodynamic speciation-solubility modelling using MINTEQA2. Metals and As are released in large amounts during the early stage of the experiment, followed by a decrease in the concentrations in the leachate as a result of adsorption on secondary (hydrous) ferric oxides (HFO/FO), predicted by MINTEQA2 calculations and confirmed on the leached slag surface by SEM and Raman spectrometry. Compared to other contaminants, Zn exhibits more pronounced mobility and is adsorbed on HFO/FO only at pH>7. Such a scavenging process may be predominant during the long-term interaction of slag with an HMW organic solution of real soil. As a result, the soil cover and subsequent re-vegetation of slag dumps may be considered as a possible scenario for slag management.


ISSN: 0026-461X
EISSN: 1471-8022
Coden: MNLMBB
Serial Title: Mineralogical Magazine
Serial Volume: 69
Serial Issue: 5
Title: The leaching behaviour of lead metallurgical slag in high-molecular-weight (HMW) organic solutions
Title: Speciation and toxicity
Author(s): Ettler, V.Jehlicka, J.Masek, V.Hruska, J.
Author(s): Hudson-Edwards, K.prefacer
Author(s): Hodson, M. E.prefacer
Affiliation: Charles University, Institute of Geochemistry, Mineralogy and Mineral Resources, Prague, Czech Republic
Affiliation: University of London, School of Earth Sciences, London, United Kingdom
Pages: 737-747
Published: 200510
Text Language: English
Publisher: Mineralogical Society, London, United Kingdom
Meeting name: Speciation and toxicity
Meeting location: London, GBR, United Kingdom
Meeting date: 20040913Sept. 13-14, 2004
References: 30
Accession Number: 2006-008035
Categories: Geochemistry of rocks, soils, and sedimentsEnvironmental geology
Document Type: Serial Conference document
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables
Secondary Affiliation: University of Reading, GBR, United KingdomGeomin, CZE, Czech RepublicCzech Geological Survey, CZE, Czech Republic
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 200606
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