Results from the EC-funded RISCS project are presented regarding groundwater sampling across two naturally occurring gas (±water) leakage points in central Italy to measure potential impacts, and evolution, of near surface groundwater chemistry. One site consists of gas only leakage in the Latera caldera, characterised by shallow alluvial sediments of volcanic (silicate) origin. The other site consists of gas and deep water leaking into a sinkhole in the San Vittorino valley, with surface sediments consisting of carbonate fluvial-lacustrine deposits. These contrasting characteristics permitted an evaluation of how site specific conditions can influence and control the potential impact of a CO2 leak on groundwater resources. Concentrations of most parameters were higher at the carbonate site despite having the higher, buffered pH. This is due to the flow of the deep-origin acidified waters through the thick carbonate stratigraphy and the higher solubility of the associated mineral phases. At the silicate site pH values less than 4 were found in the leakage area, with a clear control of major element chemistry exerted by the local potassium-rich volcanic sediments. Further down gradient the pH and dissolved concentrations for both major and trace elements approached that up gradient, non-impacted groundwaters.

Groundwater changes caused by flow through naturally occurring gas (±water) leakage points / Beaubien, Stanley Eugene; Bigi, Sabina; Lombardi, Salvatore; Sacco, Pietro; Tartarello, MARIA CHIARA. - ELETTRONICO. - (2014), pp. 389-393. (Intervento presentato al convegno 4th EAGE CO2 Geological Storage Workshop 2014: Demonstrating Storage Integrity and Building Confidence in CCS tenutosi a Stavanger; Norway nel 22-24 April, 2014) [10.3997/2214-4609.20140130].

Groundwater changes caused by flow through naturally occurring gas (±water) leakage points

BEAUBIEN, Stanley Eugene;BIGI, Sabina;LOMBARDI, Salvatore;SACCO, PIETRO;TARTARELLO, MARIA CHIARA
2014

Abstract

Results from the EC-funded RISCS project are presented regarding groundwater sampling across two naturally occurring gas (±water) leakage points in central Italy to measure potential impacts, and evolution, of near surface groundwater chemistry. One site consists of gas only leakage in the Latera caldera, characterised by shallow alluvial sediments of volcanic (silicate) origin. The other site consists of gas and deep water leaking into a sinkhole in the San Vittorino valley, with surface sediments consisting of carbonate fluvial-lacustrine deposits. These contrasting characteristics permitted an evaluation of how site specific conditions can influence and control the potential impact of a CO2 leak on groundwater resources. Concentrations of most parameters were higher at the carbonate site despite having the higher, buffered pH. This is due to the flow of the deep-origin acidified waters through the thick carbonate stratigraphy and the higher solubility of the associated mineral phases. At the silicate site pH values less than 4 were found in the leakage area, with a clear control of major element chemistry exerted by the local potassium-rich volcanic sediments. Further down gradient the pH and dissolved concentrations for both major and trace elements approached that up gradient, non-impacted groundwaters.
2014
4th EAGE CO2 Geological Storage Workshop 2014: Demonstrating Storage Integrity and Building Confidence in CCS
Carbon capture, Carbon dioxide, groundwater impact, leakage
04 Pubblicazione in atti di convegno::04b Atto di convegno in volume
Groundwater changes caused by flow through naturally occurring gas (±water) leakage points / Beaubien, Stanley Eugene; Bigi, Sabina; Lombardi, Salvatore; Sacco, Pietro; Tartarello, MARIA CHIARA. - ELETTRONICO. - (2014), pp. 389-393. (Intervento presentato al convegno 4th EAGE CO2 Geological Storage Workshop 2014: Demonstrating Storage Integrity and Building Confidence in CCS tenutosi a Stavanger; Norway nel 22-24 April, 2014) [10.3997/2214-4609.20140130].
File allegati a questo prodotto
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/645076
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 3
  • ???jsp.display-item.citation.isi??? ND
social impact