2013
DOI: 10.1111/gwat.12011
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Geochemical Implications of Brine Leakage into Freshwater Aquifers

Abstract: CO(2) injection into deep saline formations as a way to mitigate climate change raises concerns that leakage of saline waters from the injection formations will impact water quality of overlying aquifers, especially underground sources of drinking water (USDWs). This paper aims to characterize the geochemical composition of deep brines, with a focus on constituents that pose a human health risk and are regulated by the U.S. Environmental Protection Agency (USEPA). A statistical analysis of the NATCARB brine da… Show more

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Cited by 18 publications
(10 citation statements)
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“…Table summarizes the CO 2 -brine-mineral simulation systems referred to in this paper. Na + , Ca 2+ , and Cl – are the most common ionic constituents found in deep brine reservoirs of interest for CO 2 sequestration . Simplified NaCl and CaCl 2 brines were used in this study to isolate the behavior of monovalent and divalant cations.…”
Section: Simulation Detailsmentioning
confidence: 99%
“…Table summarizes the CO 2 -brine-mineral simulation systems referred to in this paper. Na + , Ca 2+ , and Cl – are the most common ionic constituents found in deep brine reservoirs of interest for CO 2 sequestration . Simplified NaCl and CaCl 2 brines were used in this study to isolate the behavior of monovalent and divalant cations.…”
Section: Simulation Detailsmentioning
confidence: 99%
“…In the case of brine leakage, original aquifer chemistry may have less of an impact on monitoring strategies while pH values may not be affected (Wunsch et al, 2013). Instead, brines contain high concentrations of Cl and Br, and because these anions are conservative they will migrate at the groundwater velocity (potentially giving an early warning) while their ratio can be used to define their source.…”
Section: Implications For Monitoringmentioning
confidence: 99%
“…Anthropogenic boron contamination in aquifers has been attributed to leaking septic systems (Massmann et al, 2008) and borate mining in Turkey (Gemici et al, 2008). Unlike ammonium and arsenic, high boron concentrations of geogenic origin have been more rarely reported in the literature, and most of them are related to geothermal activity (Bernard et al, 2011;Grassi et al, 2014) and Na-Cl brines (Wunsch et al, 2013;Palmucci and Rusi, 2014). High boron concentrations have also been described in deep aquifers in Bangladesh and Michigan (Ravenscroft and McArthur, 2003;Halim et al, 2010), and they are associated with chloride and Ca/Na cation exchange and are attributed to the mixing of fresh water with displaced ancient seawater.…”
Section: Introductionmentioning
confidence: 99%