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Tytuł:
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Element mobilization and immobilization from carbonate rocks between CO 2 storage reservoirs and the overlying aquifers during a potential CO 2 leakage.
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Autorzy:
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Lawter AR; Pacific Northwest National Laboratory (PNNL), 902 Battelle Boulevard, Richland, WA 99352, USA. Electronic address: .
Qafoku NP; Pacific Northwest National Laboratory (PNNL), 902 Battelle Boulevard, Richland, WA 99352, USA.
Asmussen RM; Pacific Northwest National Laboratory (PNNL), 902 Battelle Boulevard, Richland, WA 99352, USA.
Kukkadapu RK; Pacific Northwest National Laboratory (PNNL), 902 Battelle Boulevard, Richland, WA 99352, USA.
Qafoku O; Pacific Northwest National Laboratory (PNNL), 902 Battelle Boulevard, Richland, WA 99352, USA.
Bacon DH; Pacific Northwest National Laboratory (PNNL), 902 Battelle Boulevard, Richland, WA 99352, USA.
Brown CF; Pacific Northwest National Laboratory (PNNL), 902 Battelle Boulevard, Richland, WA 99352, USA.
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Źródło:
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Chemosphere [Chemosphere] 2018 Apr; Vol. 197, pp. 399-410. Date of Electronic Publication: 2018 Jan 04.
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Typ publikacji:
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Journal Article
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Język:
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English
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Imprint Name(s):
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Publication: Oxford : Elsevier Science Ltd
Original Publication: Oxford, New York, : Pergamon Press.
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MeSH Terms:
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Carbon Sequestration*
Carbon Dioxide/*chemistry
Carbonates/*chemistry
Minerals/*chemistry
Adsorption ; Groundwater/chemistry
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Contributed Indexing:
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Keywords: CO(2) sequestration; CO(2) transport; Carbonate; Storage reservoir
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Substance Nomenclature:
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0 (Carbonates)
0 (Minerals)
142M471B3J (Carbon Dioxide)
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Entry Date(s):
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Date Created: 20180124 Date Completed: 20180517 Latest Revision: 20181202
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Update Code:
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20240105
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DOI:
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10.1016/j.chemosphere.2017.12.199
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PMID:
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29360595
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Despite the numerous studies on changes within the reservoir following CO 2 injection and the effects of CO 2 release into overlying aquifers, little or no literature is available on the effect of CO 2 release on rock between the storage reservoirs and subsurface. This is important, because the interactions that occur in this zone between the CO 2 storage reservoir and the subsurface may have a significant impact on risk analysis for CO 2 storage projects. To address this knowledge gap, relevant rock materials, temperatures and pressures were used to study mineralogical and elemental changes in this intermediate zone. After rocks reacted with CO 2 -acidified 0.01 M NaCl, liquid analysis showed an increase of major elements (e.g., Ca and Mg) and variable concentrations of potential contaminants (e.g., Sr and Ba); lower aqueous concentrations of these elements were observed in N 2 control experiments, likely due to differences in pH between the CO 2 and N 2 experiments. In experiments with As/Cd and/or organic spikes, representing potential contaminants in the CO 2 plume originating in the storage reservoir, most or all of these contaminants were removed from the aqueous phase. SEM and Mössbauer spectroscopy results showed the formation of new minerals and Fe oxides in some CO 2 -reacted samples, indicating potential for contaminant removal through mineral incorporation or adsorption onto Fe oxides. These experiments show the interactions between the CO 2 -laden plume and the rock between storage reservoirs and overlying aquifers have the potential to affect the level of risk to overlying groundwater, and should be considered during site selection and risk evaluation.
(Copyright © 2018 Elsevier Ltd. All rights reserved.)