Match!

On the mobilization of metals by CO2 leakage into shallow aquifers: exploring release mechanisms by modeling field and laboratory experiments

Published on Aug 1, 2015in Greenhouse Gases-Science and Technology1.693
· DOI :10.1002/ghg.1493
Liange Zheng22
Estimated H-index: 22
(LBNL: Lawrence Berkeley National Laboratory),
Nicolas Spycher29
Estimated H-index: 29
(LBNL: Lawrence Berkeley National Laboratory)
+ 6 AuthorsRobert C. Trautz7
Estimated H-index: 7
(EPRI: Electric Power Research Institute)
Abstract
The dissolution of CO 2 in water leads to a pH decrease and a carbonate content increase in affected groundwater, which in turn can drive the mobilization of metals from sediments. The mechanisms of metal release postulated in various field and laboratory studies often differ. Drawing primarily on previously published results, we examine contrasting metal mobilization behaviors at two field tests and in one laboratory study, to investigate whether the same mechanisms could explain metal releases in these different experiments. Numerical modeling of the two field tests reveals that fast Ca‐driven cation exchange (from calcite dissolution) can explain the release of most major and trace metal cations at both sites, and their parallel concentration trends. The dissolution of other minerals reacting more slowly (superimposed on cation exchange) also contributes to metal release over longer time frames, but can be masked by fast ambient groundwater velocities. Therefore, the magnitude and extent of mobilization depends not only on metal‐mineral associations and sediment pH buffering characteristics, but also on groundwater flow rates, thus on the residence time of CO 2 ‐impacted groundwater relative to the rates of metal‐release reactions. Sequential leaching laboratory tests modeled using the same metal‐release concept as postulated from field experiments show that both field and laboratory data can be explained by the same processes. The reversibility of metal release upon CO 2 degassing by de‐pressurization is also explored using simple geochemical models, and shows that the sequestration of metals by resorption and re‐precipitation upon CO 2 exsolution is quite plausible and may warrant further attention. © 2015 Society of Chemical Industry and John Wiley & Sons, Ltd.
  • References (46)
  • Citations (20)
📖 Papers frequently viewed together
121 Citations
199 Citations
114 Citations
78% of Scinapse members use related papers. After signing in, all features are FREE.
References46
Newest
Leakage of CO2 from a deep storage formation into an overlying potable aquifer may adversely impact water quality and human health. Understanding CO2-water-rock interactions is therefore an important step toward the safe implementation of geologic carbon sequestration. This study targeted the geochemical response of siliclastic rock, specifically three sandstones of the Mesaverde Group in northwestern Colorado. To test the hypothesis that carbonate minerals, even when present in very low levels,...
30 CitationsSource
#1Benjamin M. Tutolo (UMN: University of Minnesota)H-Index: 16
#2Andrew J. LuhmannH-Index: 12
Last. William E. SeyfriedH-Index: 37
view all 5 authors...
Injection of cool CO2 into geothermally warm carbonate reservoirs for storage or geothermal energy production may lower near-well temperature and lead to mass transfer along flow paths leading away from the well. To investigate this process, a dolomite core was subjected to a 650 h, high pressure, CO2 saturated, flow-through experiment. Permeability increased from 10–15.9 to 10–15.2 m2 over the initial 216 h at 21 °C, decreased to 10–16.2 m2 over 289 h at 50 °C, largely due to thermally driven C...
32 CitationsSource
#1Assaf Wunsch (Colorado School of Mines)H-Index: 6
#2Alexis Navarre-Sitchler (Colorado School of Mines)H-Index: 21
Last. John E. McCray (Colorado School of Mines)H-Index: 27
view all 4 authors...
Abstract CO 2 leakage from underground CO 2 sequestration and storage poses potential risks to degradation of water quality in shallow aquifers. Increased CO 2 concentrations can result in decreased pH and lead to subsequent metal release from mineral dissolution or desorption from mineral surfaces. Dissolution of carbonate minerals present in aquifer sediments or rocks will buffer pH and is generally thought to reduce the potential risk of metal release in the event of a CO 2 leak. As a result,...
28 CitationsSource
#1Aaron G. Cahill (DTU: Technical University of Denmark)H-Index: 9
#2Rasmus Jakobsen (DTU: Technical University of Denmark)H-Index: 28
Abstract A shallow CO 2 injection experiment was conducted in an unconfined, unconsolidated siliclastic aquifer in western Denmark. The aims were to test injection and sampling systems, confirm the conceptual hydrogeological site model and determine the aquifers potential geochemical response to a larger scale, sustained CO 2 injection in order to finalize design of the main release experiment. Food grade CO 2 (45 kg in 48 h) was injected at 10 m depth into glacial sand and water chemistry subse...
43 CitationsSource
#1Charuleka Varadharajan (LBNL: Lawrence Berkeley National Laboratory)H-Index: 12
#2Ruth M. Tinnacher (LBNL: Lawrence Berkeley National Laboratory)H-Index: 9
Last. Peter S. Nico (LBNL: Lawrence Berkeley National Laboratory)H-Index: 27
view all 10 authors...
Abstract Sequestration of carbon dioxide (CO 2 ) into deep geologic reservoirs is a potential approach for controlling the rise of CO 2 concentrations in the atmosphere. Proper characterization and permitting of storage sites is expected to include an assessment of the potential impacts of CO 2 intrusion into overlying groundwater formations. In most natural settings, the dissolution of CO 2 into groundwater will decrease the pH and can also release carbonate ligands into solution. These effects...
25 CitationsSource
#1Changbing Yang (University of Texas at Austin)H-Index: 22
#2Patrick J. Mickler (University of Texas at Austin)H-Index: 13
Last. Toti E. Larson (University of Texas at Austin)H-Index: 14
view all 9 authors...
Abstract Understanding potential impacts of CO2 leakage on groundwater quality in shallow aquifers is a critical concern for geologic sequestration. This study presents a single-well push–pull test conducted in the Cranfield shallow aquifer, the SECARB Phase III early test site, for assessing potential impacts of CO2 leakage on groundwater quality. Groundwater pH, alkalinity, and electric conductivity were measured on site, and water samples were collected for chemical concentrations (major ions...
48 CitationsSource
#1Liange Zheng (LBNL: Lawrence Berkeley National Laboratory)H-Index: 22
#2Nicolas Spycher (LBNL: Lawrence Berkeley National Laboratory)H-Index: 29
Last. Yousif K. Kharaka (USGS: United States Geological Survey)H-Index: 33
view all 6 authors...
Abstract Proper site selection for CO 2 geologic storage requires assessing the impact of potential leakage of CO 2 from deep subsurface reservoirs to overlying drinking water aquifers. Although recent studies have largely focused on the mobilization of trace elements in response to the intrusion of CO 2 into such aquifers, in this paper we investigate two other leakage issues and potential effects on groundwater quality: the transport of organic compounds by supercritical CO 2 from deep storage...
44 CitationsSource
#1Pauline HumezH-Index: 9
#2Vincent Lagneau (ENSMP: Mines ParisTech)H-Index: 19
Last. Philippe NégrelH-Index: 32
view all 4 authors...
Abstract The assessment of the environmental impacts of CO 2 geological storage requires the investigation of potential CO 2 leakages into fresh groundwater, particularly with respect to protected groundwater resources. The geochemical processes and perturbations associated with a CO 2 leak into fresh groundwater could alter groundwater quality: indeed, some of the reacting minerals may contain hazardous constituents, which might be released into groundwater. Since the geochemical reactions may ...
43 CitationsSource
#1Omar R. Harvey (USM: University of Southern Mississippi)H-Index: 10
#2Nikolla P. Qafoku (PNNL: Pacific Northwest National Laboratory)H-Index: 27
Last. Christopher F. Brown (PNNL: Pacific Northwest National Laboratory)H-Index: 20
view all 6 authors...
Gas leakage from deep storage reservoirs is a major risk factor associated with geologic carbon sequestration (GCS). A systematic understanding of how such leakage would impact the geochemistry of potable aquifers and the vadose zone is crucial to the maintenance of environmental quality and the widespread acceptance of GCS. This paper reviews the current literature and discusses current knowledge gaps on how elevated CO2 levels could influence geochemical processes (e.g., adsorption/desorption ...
102 CitationsSource
#1Robert C. TrautzH-Index: 11
#2John D. PughH-Index: 5
Last. Jens BirkholzerH-Index: 37
view all 13 authors...
121 CitationsSource
Cited By20
Newest
#1Qihuang Wang (Fudan University)
#2Xiuxiu Miao (CAS: Chinese Academy of Sciences)H-Index: 2
Last. Zimeng Wang (Fudan University)
view all 8 authors...
Abstract Geological carbon storage is considered as a promising strategy to reduce greenhouse gas emissions. For those subsurface systems with uranium-bearing minerals in rock formations, there is an uncharacterized possibility for injected CO2 to cause uranium mobilization due to the coupled chemical and physical interactions at mineral--water interfaces. We developed a TOUGHREACT model to assess the uranium mobilization potential from uraninite (UO2) dissolution induced by CO2 injection into a...
Source
#1M. Dolores Basallote (UCA: University of Cádiz)H-Index: 1
#2Ana R. Borrero-Santiago (NTNU: Norwegian University of Science and Technology)H-Index: 2
Last. Murat Van Ardelan (NTNU: Norwegian University of Science and Technology)H-Index: 11
view all 6 authors...
Abstract Carbon capture and storage (CCS) is the third contributor to cumulative carbon emission reductions required by the second half of this century. Although this is a promising technology for reducing atmospheric CO2, it is only affordable if the confinement of the gas is guaranteed for hundreds of years. Hence, it is of paramount importance to figure out and predict the chemical and biological effects associated with potential CO2 leakage, to provide decision makers with a good basis for c...
2 CitationsSource
Abstract This study evaluates the potential impact of leaking CO2 gas and CO2-rich waters on shallow groundwater quality by focusing on the mobilization of trace elements. For this study, Group I (acidic CO2-rich waters with low TDS), Group II (slightly acidic CO2-rich waters with high TDS), and Group III (CO2-poor waters with low TDS) were sampled in the study area occurring naturally CO2-rich waters. The carbon isotope data (δ13C and 14C) indicate that the dissolved CO2 in CO2-rich water origi...
1 CitationsSource
#1Gidon Han (Yonsei University)
#2Weon Shik Han (Yonsei University)H-Index: 17
Last. Tae Kwon Yun (Yonsei University)
view all 6 authors...
Abstract Understanding CO2 migration and distribution in fault systems is essential to evaluate long-term secure CO2 storage and prevent hazardous effects caused by CO2 leakage. To elucidate the role of the fault system on subsurface CO2 migration and leakage processes, a two-dimensional multi-phase transport model was constructed to represent Little Grand Wash (LGW) and Salt Wash (SW) faults, where naturally originating CO2 is being leaked to the surface. According to simulation results, buoyan...
Source
#1Zahra Derakhshan-Nejad (Yonsei University)H-Index: 2
#2Jing Sun (Yonsei University)H-Index: 1
Last. Giehyeon Lee (POSTECH: Pohang University of Science and Technology)H-Index: 15
view all 4 authors...
Carbon dioxide (CO2) capture and storage (CCS) plays a crucial role in reducing carbon emissions to the atmosphere. However, gas leakage from deep storage reservoirs, which may flow back into near-surface and eventually to the atmosphere, is a major concern associated with this technology. Despite an increase in research focusing on potential CO2 leakage into deep surface features and aquifers, a significant knowledge gap remains in the geochemical changes associated with near-surface. This stud...
4 CitationsSource
#1Charuleka Varadharajan (LBNL: Lawrence Berkeley National Laboratory)H-Index: 12
#2Ruth M. Tinnacher (LBNL: Lawrence Berkeley National Laboratory)H-Index: 1
Last. J. William Carey (LANL: Los Alamos National Laboratory)H-Index: 29
view all 9 authors...
Source
#1Yousif K. Kharaka (USGS: United States Geological Survey)H-Index: 33
#2A. A. Abedini (USGS: United States Geological Survey)H-Index: 1
Last. R. Burt Thomas (USGS: United States Geological Survey)H-Index: 2
view all 6 authors...
Abstract The Zero Emission Research and Technology (ZERT) field experiment at Bozeman, Montana, USA, was a multi-disciplinary field pilot designed to evaluate near-surface CO2 transport and monitoring technologies applicable to its potential leakage from deep storage reservoirs. As part of this program, sediment cores from two wells at the site were reacted with a solution having the approximate composition of groundwater from the site. A total of 50 water samples were collected from 7 container...
Source
#1Christos D. Tsakiroglou (FORTH: Foundation for Research & Technology – Hellas)H-Index: 22
#2Katerina Terzi (FORTH: Foundation for Research & Technology – Hellas)
Last. M.A. Theodoropoulou (FORTH: Foundation for Research & Technology – Hellas)H-Index: 9
view all 4 authors...
Abstract The eventual leakage of CO 2 from storage sites into shallow aquifers may degrade the quality of potable groundwater, due to acidification caused by the intrusion of gas CO 2 . Experiments in continuous-stirred tank reactors (CSTRs) seems to be a fast and cost-effective way to quantify the kinetics of heavy metal release from soil material to groundwater. The goal of the present work is to evaluate the capability of a model to provide reliable values for the kinetic parameters of metal ...
Source
#1Liange Zheng (LBNL: Lawrence Berkeley National Laboratory)H-Index: 22
#2Nicolas Spycher (LBNL: Lawrence Berkeley National Laboratory)H-Index: 29
Source
#1Liange Zheng (LBNL: Lawrence Berkeley National Laboratory)H-Index: 22
#2Nicolas Spycher (LBNL: Lawrence Berkeley National Laboratory)H-Index: 29
Author(s): Zheng, L; Spycher, N | Abstract: Published 2017. This article is a U.S. Government work and is in the public domain in the USA. Large-scale deployment of CO2geological sequestration requires understanding and assessing the risks of such an operation. One of these risks is the potential contamination of groundwater by CO2/brine leakage into shallow aquifers. Although our understanding of this issue has improved significantly over the last decade, several questions still need to be bett...
4 CitationsSource