Abstract
Geogenic groundwater contaminants (GGCs) affect drinking-water availability and safety, with up to 60% of groundwater sources in some regions contaminated by more than recommended concentrations. As a result, an estimated 300–500 million people are at risk of severe health impacts and premature mortality. In this Review, we discuss the sources, occurrences and cycling of arsenic, fluoride, selenium and uranium, which are GGCs with widespread distribution and/or high toxicity. The global distribution of GGCs is controlled by basin geology and tectonics, with GGC enrichment in both orogenic systems and cratonic basement rocks. This regional distribution is broadly influenced by climate, geomorphology and hydrogeochemical evolution along groundwater flow paths. GGC distribution is locally heterogeneous and affected by in situ lithology, groundwater flow and water–rock interactions. Local biogeochemical cycling also determines GGC concentrations, as arsenic, selenium and uranium mobilizations are strongly redox-dependent. Increasing groundwater extraction and land-use changes are likely to modify GGC distribution and extent, potentially exacerbating human exposure to GGCs, but the net impact of these activities is unknown. Integration of science, policy, community involvement programmes and technological interventions is needed to manage GGC-enriched groundwater and ensure equitable access to clean water.
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Change history
28 September 2020
In the version of the article initially published an incorrect version of the Supplementary information was included. This has now been updated in the HTML version of the article.
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Acknowledgements
A.M. acknowledges the time and resources obtained from the project DST/TMD-EWO/WTI/2K19/EWFH/2019/201 (G) & (C) dated 28.10.2020 for authoring the manuscript. A.M. and D.A.P. acknowledge Newton Fund NERC and DST (NE/R003386/1 and DST/TM/INDO-UK/2K17/55I 609 & 55(G)). US National Science Foundation grant EAR-2037553 partially supported K.H.J.’s efforts and contribution. M.A.A. acknowledges the support of the ANID Vinculación Internacional FOVI220217 project, also participated in by A.M., P.B., J.B., J.I., D.A.P. and J.T. P.B. would like to thank the seminal research funding from the Swedish International Development Cooperation Agency [Sida Contributions: 7500707606 (2007-2013), 75000553 (2014-2020), and 54100087 (2021-2025)] for research cooperation in the Altiplano Region, Idea Support Grant 2005-035-137 from the Strategic Environmental Research Foundation (MISTRA), Stockholm, Sweden, Swedish International Development Cooperation Agency (Sida) project “Sustainable Arsenic Mitigation (SASMIT)” (Sida Contribution 73000854), and the project, DAFWAT (Sida Contribution 51170071) at KTH Royal Institute of Technology. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
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A.M. authored the manuscript with the support of P.C., S.S., K.H.J., A.E.F. and M.E.S. D.A.P. and B.R.S. helped with editing. M.C., P.B. and B.R.S. provided data for the Supplementary Information. J.P. drafted Fig. 2b. K.M.A., M.A.A., P.B., J.B., W.B., M.C., R.C., A.Fa., H.G., J.I., G.J., D.M., D.K.N., J.P., D.A.P., M.Sh., J.T. and A.V. reviewed and edited the manuscript. All authors made substantial contributions to the content of the manuscript.
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Mukherjee, A., Coomar, P., Sarkar, S. et al. Arsenic and other geogenic contaminants in global groundwater. Nat Rev Earth Environ 5, 312–328 (2024). https://doi.org/10.1038/s43017-024-00519-z
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DOI: https://doi.org/10.1038/s43017-024-00519-z