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- Title
Accessing effects and signals of leakage from a CO<sub>2</sub> reservoir to a shallow freshwater aquifer by reactive transport modelling.
- Authors
Szabó, Zsuzsanna; Gál, Nóra Edit; Kun, Éva; Szőcs, Teodóra; Falus, György
- Abstract
CO2 geological storage is a transitional technology for the mitigation of climate change. In the vicinity of potential CO2 reservoirs in Hungary, protected freshwater aquifers used for drinking water supplies exist. Effects of disaster events of CO2 escape and brine displacement to one of these aquifers have been studied by kinetic 1D reactive transport modelling in PHREEQC. Besides verifying that ion concentrations in the freshwater may increase up to drinking water limit values in both scenarios (CO2 or brine leakage), total porosity of the rock is estimated. Pore volume is expected to increase at the entry point of CO2 and to decrease at further distances, whereas it shows minor increase along the flow path for the effect of brine inflow. Additionally, electrical conductivity of water is estimated and suggested to be the best parameter to measure for cost-effective monitoring of both worst-case leakage scenarios.
- Subjects
GEOLOGICAL carbon sequestration; LEAKAGE; FRESHWATER ecology; AQUIFERS; ION exchange (Chemistry)
- Publication
Environmental Earth Sciences, 2018, Vol 77, Issue 12, p1
- ISSN
1866-6280
- Publication type
Article
- DOI
10.1007/s12665-018-7637-6