RT info:eu-repo/semantics/article
T1 Concentrations of F-, Na+, and K+ in groundwater before and  after an earthquake: a case study on Tenerife Island, Spain
A1 Gómez González, José Francisco
A1 Miguel García, Eduardo de
K1 Groundwater
K1 Aquifers
K1 Fluorine
K1 Sodium
K1 Potassium
K1 Earthquake
K1 Volcanic terrain
AB Freshwater, vital for life and ecosystems, accounts for only 2.5% of Earth’s water, and isprimarily located in polar caps, underground reservoirs, and surface water. Its quality varies due toenvironmental interactions, especially in groundwater. Tenerife, located in the Canary Islands, Spain,relies mainly on underground aquifers and tunnels capturing 51.6 cubic hectometers annually. Ensuring safe drinking water is a global challenge due to health risks from poor water quality, includingdiseases and cancer. Fluoride, sodium, and potassium are essential for health, and are mainly derivedfrom groundwater as fluoride ions (F−) and sodium and potassium cations (Na+, K+). However,excessive F−, Na+, and K+in drinking water is harmful. The World Health Organization limits F− to1.5 mg/L, Na+to 8.70 meq/L, and K+to 0.31 meq/L. Geological, climatic, and human factors controlthe presence and transport of F−, Na+, and K+in groundwater. Seismic events can impact waterquality, with long-term effects linked to aquifer structure and transient effects from gas and fluidexpansion during earthquakes. This study was motivated by a 3.8 mbLg earthquake in Tenerife in2012, which allowed its impact on groundwater quality, specifically F−, Na+, and K− concentrations,to be examined. Post-earthquake, F− levels alarmingly increased to 8.367 meq/L, while Na+ and K+showed no significant changes. This research quantifies the influence of earthquakes on increasingF− levels and evaluates F− reduction during low seismic activity, emphasizing the importance ofwater management on volcanic islands.
SN 2306-5338
YR 2024
FD 2024
LK http://riull.ull.es/xmlui/handle/915/39005
UL http://riull.ull.es/xmlui/handle/915/39005
LA en
DS Repositorio institucional de la Universidad de La Laguna
RD 09-nov-2025