Abstract
We show that sulphur isotopic composition can be a useful tool to discriminate between various sources of sulphate and a tool for better understanding of the sulphur cycling and mass balance. Our investigations, carried out in a dam reservoir, demonstrate differences in sulphur biogeochemistry between different seasons, caused by recharge water supply in spring and intensive sulphate reduction in summer. In the riverine-affected part of the reservoir δ34S(SO4 2−) varied from 4.7 to 5.9‰ in spring, and from 4.1 to 4.6‰ in summer. In the lacustrine-affected part δ34S(SO 2−4 ) varied from 4.0 to 5.0‰ in spring, and from 4.5 to 5.4‰ in summer. Diurnal variations of δ34S(SO4 2−) were negligible as compared to seasonal variations.
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Acknowledgments
Deepest thanks are due to Wojciech Drzewicki, Sebastian Ratajski, Katarzyna Izydorczyk, Marta Kurasiewicz, Adam Kałużny, Tristan Crew, Roksana Knapik and students of Environmental Geochemistry and Waste Management at Univ. of Wrocław for their substantial help in sampling and preliminary laboratory works. Great thanks are due to S. Halas for his help in mass spectrometry analysis. This manuscript has benefited from the correction by Dariusz Strapoc and Courtney Turich, and from the comments of an anonymous reviewer. This study was supported from Polish Ministry of Education and Science, grant No.: 2PO4G04528 and ‘S’ and ‘W’ grants of University of Wrocław.
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Lewicka-Szczebak, D., Trojanowska, A., Górka, M. et al. Sulphur isotope mass balance of dissolved sulphate ion in a freshwater dam reservoir. Environ Chem Lett 6, 169–173 (2008). https://doi.org/10.1007/s10311-007-0120-3
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DOI: https://doi.org/10.1007/s10311-007-0120-3