Arsenic and other geogenic contaminants in global groundwater

Abhijit Mukherjee, Poulomee Coomar, Soumyajit Sarkar, Karen H. Johannesson, Alan E. Fryar, Madeline E. Schreiber, Kazi Matin Ahmed, Mohammad Ayaz Alam, Prosun Bhattacharya, Jochen Bundschuh, William Burgess, Madhumita Chakraborty, Rachel Coyte, Abida Farooqi, Huaming Guo, Julian Ijumulana, Gh Jeelani, Debapriya Mondal, D. Kirk Nordstrom, Joel PodgorskiDavid A. Polya, Bridget R. Scanlon, Mohammad Shamsudduha, Joseline Tapia, Avner Vengosh

Research output: Contribution to journalReview articlepeer-review

2 Scopus citations

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.

Original languageEnglish
Pages (from-to)312-328
Number of pages17
JournalNature Reviews Earth and Environment
Volume5
Issue number4
DOIs
StatePublished - Apr 2024

Bibliographical note

Publisher Copyright:
© Springer Nature Limited 2024. corrected publication 2024.

ASJC Scopus subject areas

  • Pollution
  • Earth-Surface Processes
  • Atmospheric Science
  • Nature and Landscape Conservation

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