Antimony retention and release from drained and waterlogged shooting range soil under field conditions
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Authors
Hockmann, Kerstin
Tandy, Susan
Reiser, Rene
Conesa, Hector
Keller, Martin
Studer, Björn
Schulin, Rainer
Author (Corporation)
Publication date
09.2015
Typ of student thesis
Course of study
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Type
01A - Journal article
Editors
Editor (Corporation)
Supervisor
Parent work
Chemosphere
Special issue
DOI of the original publication
Link
Series
Series number
Volume
134
Issue / Number
Pages / Duration
536–543
Patent number
Publisher / Publishing institution
Elsevier
Place of publication / Event location
Edition
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Abstract
Many soils polluted by antimony (Sb) are subject to fluctuating waterlogging conditions; yet, little is known about how these affect the mobility of this toxic element under field conditions. Here, we compared Sb leaching from a calcareous shooting range soil under drained and waterlogged conditions using four large outdoor lysimeters. After monitoring the leachate samples taken at bi-weekly intervals for >1.5 years under drained conditions, two of the lysimeters were subjected to waterlogging with a water table fluctuating according to natural rainfall water infiltration. Antimony leachate concentrations under drained conditions showed a strong seasonal fluctuation between 110 μg L−1 in summer and <40 μg L−1 in winter, which closely correlated with fluctuations in dissolved organic carbon (DOC) concentrations. With the development of anaerobic conditions upon waterlogging, Sb in leachate decreased to 2–5 μg L−1 Sb and remained stable at this level. Antimony speciation measurements in soil solution indicated that this decrease in Sb(V) concentrations was attributable to the reduction of Sb(V) to Sb(III) and the stronger sorption affinity of the latter to iron (Fe) (hydr)oxide phases. Our results demonstrate the importance of considering seasonal and waterlogging effects in the assessment of the risks from Sb-contaminated sites.
Keywords
Sb speciation, Redox potential, Microbial reduction, Sb leaching, Transport, Eh
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ISBN
ISSN
0045-6535
1879-1298
1879-1298
Language
English
Created during FHNW affiliation
Yes
Strategic action fields FHNW
Publication status
Published
Review
Peer review of the complete publication
Open access category
License
Citation
Hockmann, K., Tandy, S., Lenz, M., Reiser, R., Conesa, H., Keller, M., Studer, B., & Schulin, R. (2015). Antimony retention and release from drained and waterlogged shooting range soil under field conditions. Chemosphere, 134, 536–543. https://doi.org/10.1016/j.chemosphere.2014.12.020