Publication Date:
2017-04-04
Description:
Gas and water samples were collected at CO2-rich wells in the plain of Florina (N. Greece). Chemical and isotopic composition of the analysed gases reveals their main crustal origin even if a small but significant contribution of mantle derived gases can be recognized. As a consequence of CO2 dissolution, HCO3- is always the main dissolved anion while cationic composition allows us to distinguish at least two main groups characterized by Na or Ca as dominant dissolved cations. The water-rock interaction is strongly enhanced by the dissolution of CO2 and the consequent lowering of pH. Such a process increases the mobility of some trace elements whose concentrations very often exceed UE drinking water limits. This study confirms that the Florina basin represents a good natural analogue of carbon storage systems and underscores the fact that possible deterioration of water quality due to CO2 leaks of the reservoirs must be carefully taken in account.
Description:
Published
Description:
135-143
Description:
4.5. Studi sul degassamento naturale e sui gas petroliferi
Description:
reserved
Keywords:
Groundwater
;
Water quality
;
carbon dioxide
;
trace elements
;
03. Hydrosphere::03.02. Hydrology::03.02.03. Groundwater processes
;
03. Hydrosphere::03.02. Hydrology::03.02.04. Measurements and monitoring
;
03. Hydrosphere::03.04. Chemical and biological::03.04.03. Chemistry of waters
;
03. Hydrosphere::03.04. Chemical and biological::03.04.05. Gases
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
book chapter
Permalink
