Sulphate in freshwater ecosystems: A review of sources, biogeochemical cycles, ecotoxicological effects and bioremediation

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisReviewForskningpeer review

  • Dominik Zak
  • Michael Hupfer, Leibniz-Institute of Freshwater Ecology and Inland Fisheries
  • ,
  • Alvaro Cabezas, Leibniz-Institute of Freshwater Ecology and Inland Fisheries
  • ,
  • Gerald Jurasinski, University of Rostock
  • ,
  • Joachim Audet
  • Andreas Kleeberg, Landeslabor Berlin-Brandenburg
  • ,
  • Robert McInnes, RM Wetlands & Environment Ltd.
  • ,
  • Søren Munch Kristiansen
  • Rasmus Jes Petersen
  • Haojie Liu, University of Rostock
  • ,
  • Tobias Goldhammer, Leibniz-Institute of Freshwater Ecology and Inland Fisheries

Sulphate (SO42-) concentrations in freshwaters have increased globally over the last decades even though a strong reduction in atmospheric sulphur (S) deposition has occurred across large parts of North America and Europe. However, the extent and effects of increased SO42- concentrations in freshwater and terrestrial ecosystems remain poorly understood regarding many aspects of ecosystem structure and functioning. Here, we review the sources of SO42- pollution, environmental impacts on freshwater ecosystems and bioremediation opportunites and we identify key knowledge gaps and future research needs. Natural sources of dissolved SO42- in freshwater ecosystems include mineral weathering, volcanic activity, decomposition and combustion of organic matter, oxidation of sulphides, and sea spray aerosols. Acid mine drainage, fertiliser leaching from agricultural soils, wetland drainage, agricultural and industrial wastewater runoff as well as sea level changes are the main direct and indirect sources of the anthropogenic SO42- input to waterbodies. Increasing SO42- concentrations in freshwater systems influence the biogeochemical processes of carbon, nitrogen and phosphorus. Similarly, iron availability can be critical in determining the adverse effects of SO42- on environmental receptors. The literature reviewed clearly demonstrates that SO42- pollution may have toxic effects on aquatic plants and animal organisms, including, among others, fishes, invertebrates and amphibians, and it may also have negative implications for human health. Bioremediation systems provide opportunities to mitigate the impacts of SO42-, but removal efficiencies range widely from 0% to 70% across treatment systems such as constructed wetlands, permeable reactive barriers and bioreactors. We conclude that examination of increased SO42- concentrations and fluxes at different spatial scales is urgently needed as the ongoing global perturbation of the S cycle is likely to be accelerated by climate change and human development activities. The adverse effects of this on freshwater organisms worldwide may prove detrimental to the future well-being of humans and ecosystems. Field-scale research to estimate the ecotoxicological effects of elevated SO42- concentrations is recommended as is widespread implementation of large-scale wetland restoration and bioremediation systems to reduce SO42- loads on freshwater ecosystems.

OriginalsprogEngelsk
Artikelnummer103446
TidsskriftEarth-Science Reviews
Vol/bind212
Antal sider23
ISSN0012-8252
DOI
StatusUdgivet - jan. 2021

Bibliografisk note

Funding Information:
We gratefully acknowledge the contribution of the staff at the IGB Department of Chemical Analytics and Biogeochemistry, in particular the expert advice of Jörg Gelbrecht. This study was facilitated through an internal IGB grant “Frontiers in freshwater science” and supported by the State Office of Mining, Geology and Resources, Brandenburg. Finalisation of the study was funded by the European Social Fund (ESF), the Ministry of Education, Science and Culture of Mecklenburg-Western Pomerania within the scope of the project WETSCAPES ( ESF/14-BM-A55-0030/16 ) and the GRS Cluster “Signatures of severely disturbed landscapes - case study mining landscapes” (BTU Cottbus-Senftenberg/IGB). The following German authorities are thanked for providing sulphate monitoring data: the Chair of Water Conservation at BTU Cottbus/Senftenberg, the State Office for the Environment Brandenburg, State Office for the Environment Baden Wurttemberg; the State Agency for Flood Protection and Water Management Saxony Anhalt; the State Office for the Environment Rhineland-Palatinate, the Berlin Senate for the Environment, Transport and Climate Protection, the Ministry of Agriculture and Environment Mecklenburg-Western Pomerania, the State Office for Agriculture, Environment and Rural Areas Schleswig-Holstein and the Bavarian State Office for the Environment. Funding agencies were not involved in the study design, collection, analysis and interpretation of data nor in the writing of the manuscript and the decision to submit the article for publication. The Editage and Anne Mette Poulsen are thanked for English language editing. We gratefully acknowledge Joan-Albert Sanchez-Cabeza for editorial handling and two anonymous referees for constructive comments that have greatly improved the paper.

Publisher Copyright:
© 2020 Elsevier B.V.

Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.

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