Reactive transport modeling for impact assessment of a CO2 intrusion on trace elements mobility within fresh groundwater and its natural attenuation for potential remediation

Vong, Chan Quang; Jacquemet, Nicolas; Picot-Colbeaux, Géraldine; Lions, Julie; Rohmer, Jérémy; Bouc, Olivier

doi:10.1016/j.egypro.2011.02.232

Cited by 33 publications

(35 citation statements)

References 9 publications

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“…These studies include natural analogs (Caritat et al, 2013, Keating et al, 2010, Lewicki et al, 2007, field in-situ CO2 injections (Kharaka et al, 2010b, Nisi et al, 2013, Trautz et al, 2013, and experimental column and batch studies (Humez et al, 2013, Little and Jackson, 2010, Lu et al, 2010, Montes-Hernandez et al, 2013, Wei et al, 2011 However, the results of the studies are inconsistent and, in some cases, contradictory as some indicate CO₂ leaks pose a serious risk (Cahill et al, 2013, Kharaka et al, 2010b, Little and Jackson, 2010, Lu et al, 2010, Vong et al, 2011, Wang and Jaffe, 2004, Wei et al, 2011, Zheng et al, 2009, some indicate low levels of risk (Frye et al, 2012, Keating et al, 2010, Kirsch et al, 2014, Mickler et al, 2013, and others have found some possible benefits (such as the removal of As, U, V, and Cr) related to CO₂ leakage into groundwater (Lu et al, 2010. Clearly, the scientific community has not yet reached an agreement on the important issue of deciding whether the impacts from the leakage of CO₂ into groundwater are negative, insignificant, or positive.…”

Section: General Overviewmentioning

confidence: 97%

“…Studies conducted in other aquifers have reported experimental and modeling data used to conduct an evaluation of the groundwater quality changes as a result of a potential leakage of CO2 (Altevogt and Jaffe, 2005, Apps et al, 2010, Carroll et al, 2009, Jacquemet et al, 2011, Vong et al, 2011, Wang and Jaffe, 2004, Wilkin and Digiulio, 2010, Zheng et al, 2009. Studies have also looked at the chemical reactions that control the CO2-induced release of metals via model interpretation of laboratory experiments (Kirsch et al, 2014, Viswanathan et al, 2012, Wunsch et al, 2014 and field tests (Trautz et al, 2013, Zheng et al, 2012.…”

Section: Download High-res Image (147kb)mentioning

confidence: 99%

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Review of the impacts of leaking CO2 gas and brine on groundwater quality

Qafoku

Lawter

Bacon

et al. 2017

Earth-Science Reviews

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This paper provides an overview of the existing data and knowledge presented in recent literature about the potential leaking of CO2 from the deep subsurface storage reservoirs and the effects on groundwater quality. The objectives are to: 1) present data and discuss potential risks associated with the groundwater quality degradation due to CO2 gas and brine exposure; 2) identify the set of geochemical data required to develop models to assess and predict aquifer responses to CO2 and brine leakage; and 3) present a summary of the findings and reveal future trends in this important and expanding research area. The discussion is focused around aquifer responses to CO2 gas and brine exposure and the degree of impact; major hydrogeological and geochemical processes and site-specific properties known to control aquifer quality under CO2 exposure conditions; contributions from the deep reservoirs (plume characteristics and composition); and the possibility of establishment of a new network of reactions and processes affecting or controlling the overall mobility of major, minor, and trace elements and the fate of the elements released from sediments or transported with brine. This paper also includes a discussion on the development of conceptual and reduced order models (ROMs) to describe and predict aquifer responses and whether or not the release of metals following exposure to CO2 is harmful, which are an essential tool for CO2 sequestration related risk assessment. Future research needs in this area are also included at the end of the paper.

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Section: General Overviewmentioning

confidence: 97%

Section: Download High-res Image (147kb)mentioning

confidence: 99%

Review of the impacts of leaking CO2 gas and brine on groundwater quality

Qafoku

Lawter

Bacon

et al. 2017

Earth-Science Reviews

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“…Experimental and modeling studies indicate that CO 2 intrusion into the vadose zone or potable aquifers could induce a decrease in aqueous pH of 1 to 3 units (Altevogt and Jaffe 2005;Little and Jackson 2010;Lu et al 2010;Vong et al 2011;Wang and Jaffe 2004;Wei et al 2011;Wilkin and DiGiulio 2010;Kharaka et al 2010 …”

Section: Co 2 -Induced Changes In Aqueous Phase Phmentioning

confidence: 99%

“…For an 8-year simulation, Wang and Jaffe (2004) predicted that CO 2 -induced decrease in pH would result in increased dissolution of the PbS and subsequent increases of aqueous concentrations of Pb. Vong et al (2011) modeled the potential for the intrusion of CO 2 into a glauconitic-sandstone aquifer system to induce excessive release of heavy metals into solution. Vong et al (2011) also predicted that a decrease in aqueous pH associated CO 2 intrusion into the aquifer would adversely affect potable groundwater quality due to CO 2 -enhanced dissolution of galena and other trace-metal bearing minerals resulting in increased aqueous concentrations of Pb, Cd, Cu, Fe, Mn and Zn.…”

Section: Mobilization Of Contaminantsmentioning

confidence: 99%

Geochemical Implications of CO2 Leakage Associated with Geologic Storage: A Review

Harvey¹,

Qafoku²,

Cantrell³

et al. 2012

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Leakage from deep storage reservoirs is a major risk factor associated with geologic sequestration of carbon dioxide (CO 2 ). Different scientific theories exist concerning the potential implications of such leakage for near-surface environments. The authors of this report reviewed the current literature on how CO 2 leakage (from storage reservoirs) would likely impact the geochemistry of near surface environments such as potable water aquifers and the vadose zone.Experimental and modeling studies highlighted the potential for both beneficial (e.g., CO 2 re-sequestration or contaminant immobilization) and deleterious (e.g., contaminant mobilization) consequences of CO 2 intrusion in these systems. Current knowledge gaps, including the role of CO 2 -induced changes in redox conditions, the influence of CO 2 influx rate, gas composition, organic matter content and microorganisms are discussed in terms of their potential influence on pertinent geochemical processes and the potential for beneficial or deleterious outcomes.Geochemical modeling was used to systematically highlight why closing these knowledge gaps are pivotal. A framework for studying and assessing consequences associated with each factor is also presented in Section 5.6. v

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“…Previous studies have been conducted with various conclusions over the past few years. Results range from indication that potential CO 2 leakage poses a serious risk to overlying groundwater resources (Wang and Jaffe, 2004;Zheng et al, 2009;Kharaka et al, 2010;Little and Jackson, 2010;Vong et al, 2011;Wei et al, 2011;Cahill et al, 2013), to a low level of risk (Smyth et al, 2009;Keating et al, 2010;Frye et al, 2012;Mickler et al, 2013;Kirsch et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Evaluating impacts of CO2 and CH4 gas intrusion into an unconsolidated aquifer: fate of As and Cd

Lawter

Qafoku

Shao

et al. 2015

Front. Environ. Sci.

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The sequestration of carbon dioxide (CO 2 ) in deep underground reservoirs has been identified as an important strategy to decrease atmospheric CO 2 levels and mitigate global warming, but potential risks on overlying aquifers currently lack a complete evaluation. In addition to CO 2 , other gasses such as methane (CH 4 ) may be present in storage reservoirs. This paper explores for the first time the combined effect of leaking CO 2 and CH 4 gasses on the fate of major, minor and trace elements in an aquifer overlying a potential sequestration site. Emphasis is placed on the fate of arsenic (As) and cadmium (Cd) released from the sediments or present as soluble constituents in the leaking brine. Results from macroscopic batch and column experiments show that the presence of CH 4 (at a concentration of 1% in the mixture CO 2 /CH 4 ) does not have a significant effect on solution pH or the concentrations of most major elements (such as Ca, Ba, and Mg). However, the concentrations of Mn, Mo, Si and Na are inconsistently affected by the presence of CH 4 (i.e., in at least one sediment tested in this study). Cd is not released from the sediments and spiked Cd is mostly removed from the aqueous phase most likely via adsorption. The fate of sediment associated As [mainly sorbed arsenite or As(III) in minerals] and spiked As [i.e., As 5+ ] is complex. Possible mechanisms that control the As behavior in this system are discussed in this paper. Results are significant for CO 2 sequestration risk evaluation and site selection and demonstrate the importance of evaluating reservoir brine and gas stream composition during site selection to ensure the safest site is being chosen.

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Reactive transport modeling for impact assessment of a CO2 intrusion on trace elements mobility within fresh groundwater and its natural attenuation for potential remediation

Cited by 33 publications

References 9 publications

Review of the impacts of leaking CO2 gas and brine on groundwater quality

Review of the impacts of leaking CO2 gas and brine on groundwater quality

Geochemical Implications of CO2 Leakage Associated with Geologic Storage: A Review

Evaluating impacts of CO2 and CH4 gas intrusion into an unconsolidated aquifer: fate of As and Cd

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