Dissolution rates of actinolite and chlorite from a whole-rock experimental study of metabasalt dissolution from 2 ≤ pH ≤ 12 at 25 °C

Critelli, Teresa; Marini, Luigi; Schott, Jacques; Mavromatis, Vasileios; Apollaro, Carmine; Rinder, Thomas; Rosa, R. De; Oelkers, Eric H.

doi:10.1016/j.chemgeo.2014.10.013

Cited by 45 publications

(19 citation statements)

References 63 publications

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“…-7 to -8.2 mol/m 2 /s at pH < 1, were significantly higher than those reported for antigorite [Critelli et al, 2015], lizardite [Daval et al, 2013] and chrysotile [Thom et al, 2013] with logR values ca. -11 mol/m 2 /s at pH ≈ 2.…”

Section: The Rate Of Serpentine Dissolutionmentioning

confidence: 58%

“…Furthermore, the experimental procedure reported here involved materials sieved only to a maximum size rather than a narrow size range, i.e. containing particle < 250 µm in diameter, including rapidly reacting fines compared to the abovementioned studies where the fines were ultrasonically removed [Daval et al, 2013;Critelli et al, 2015]. Table 5 presents a summary of experimental and calculated data, including the evolution of pH with time, measured at 20°C and calculated at 70°C (PHREEQC 3.2).…”

Section: The Rate Of Serpentine Dissolutionmentioning

confidence: 99%

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Acid-dissolution of antigorite, chrysotile and lizardite for ex situ carbon capture and storage by mineralisation

et al. 2016

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Serpentine minerals serve as a Mg donor in carbon capture and storage by mineralisation (CCSM).The acid-treatment of nine comprehensively-examined serpentine polymorphs and polytypes, and the subsequent microanalysis of their post-test residues highlighted several aspects of great importance to the choice of the optimal feed material for CCSM. Compelling evidence for the nonuniformity of serpentine mineral performance was revealed, and the following order of increasing Mg extraction efficiency after three hours of acid-leaching was established: Al-bearing polygonal serpentine (<5%) ≤ Al-bearing lizardite 1T (≈5%) < antigorite (24-29%) < well-ordered lizardite 2H 1 (≈65%) ≤ Al-poor lizardite 1T (≈68%) < chrysotile (≈70%) < poorly-ordered lizardite 2H 1 (≈80%) < nanotubular chrysotile (≈85%).It was recognised that the Mg extraction efficiency of the minerals depended greatly on the intrinsic properties of crystal structure, chemistry and rock microtexture. On this basis, antigorite and Albearing well-ordered lizardite were rejected as potential feedstock material whereas any chrysotile, non-aluminous, widely spaced lizardite and/or disordered serpentine were recommended.The formation of peripheral siliceous layers, tens of microns thick, was not universal and depended greatly upon the intrinsic microtexture of the leached particles. This study provides the first comprehensive investigation of nine, carefully-selected serpentine minerals, covering most varieties and polytypes, under the same experimental conditions. We focused on material characterisation and the identification of the intrinsic properties of the minerals that affect particle's reactivity. It can therefore serve as a generic basis for any acid-based CCSM pre-treatment.

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Section: The Rate Of Serpentine Dissolutionmentioning

confidence: 58%

Section: The Rate Of Serpentine Dissolutionmentioning

confidence: 99%

Acid-dissolution of antigorite, chrysotile and lizardite for ex situ carbon capture and storage by mineralisation

et al. 2016

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“…Most geochemical studies implement kinetic data from [46], which only provide kinetic constants for Mg-rich clinochlore. It seems that also recent investigations into chlorite kinetics focus mainly on clinochlore (e.g., [47][48][49]). The effect of varying chemical composition of chlorite on dissolution rates is uncertain, as no thorough studies have been performed in this realm.…”

Section: Characterization Of Chloritesmentioning

confidence: 99%

Using Reservoir Geology and Petrographic Observations to Improve CO2 Mineralization Estimates: Examples from the Johansen Formation, North Sea, Norway

Sundal

Hellevang

2019

Minerals

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Reservoir characterization specific to CO2 storage is challenging due to the dynamic interplay of physical and chemical trapping mechanisms. The mineralization potential for CO2 in a given siliciclastic sandstone aquifer is controlled by the mineralogy, the total reactive surface areas, and the prevailing reservoir conditions. Grain size, morphologies and mineral assemblages vary according to sedimentary facies and diagenetic imprint. The proposed workflow highlights how the input values for reactive mineral surface areas used in geochemical modelling may be parameterized as part of geological reservoir characterization. The key issue is to separate minerals both with respect to phase chemistry and morphology (i.e., grain size, shape, and occurrence), and focus on main reactants for sensitivity studies and total storage potentials. The Johansen Formation is the main reservoir unit in the new full-value chain CO2 capture and storage (CCS) prospect in Norway, which was licenced for the storage of CO2 as of 2019. The simulations show how reaction potentials vary in different sedimentary facies and for different mineral occurrences. Mineralization potentials are higher in fine-grained facies, where plagioclase and chlorite are the main cation donors for carbonatization. Reactivity decreases with higher relative fractions of ooidal clay and lithic fragments.

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“…Water-rock interaction is an important driving force for the evolution of the near-surface environment. It has a great influence on the geological structure of the strata and the stability of underground engineering under the coupling action of chemistry and mechanics [1][2][3][4]. As one of the important forms of water-rock interaction, dry-wet cycling studies the effects of water on the physical and mechanical properties of rocks by simulating periodic changes of water content.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Physicomechanical Properties of Deep Sandstone by Coupling of Dry‐Wet Cycles and Acidic Environment

Huang

Pang

Liu

et al. 2020

Advances in Civil Engineering

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Underground engineering, especially deep geotechnical engineering, is often affected alternately by groundwater infiltration and ventilation drying during construction and use. In addition, acid rain, mineral dissolution, acid deposition, and other factors make groundwater acidic. This caused the underground structure to erode and has also threatened its safety and durability. In this study, both the physical and mechanical properties under acid dry-wet (A-D-W) cycles were investigated. Deep sandstone was treated repeatedly under acid cycling, and its physical parameters were measured. Uniaxial compressive strength tests and microtests were carried out. Finally, using a combination of scanning electron microscopy (SEM) and backscatter electron images (BSE), the microstructural changes of sandstone under the combined action of an acidic environment and a dry-wet cycle were described. The test results show that the mass, P-wave velocity, peak stress, and elastic modulus of sandstone after the A-D-W cycles decreased by 0.43%, 7.87%, 70.20%, and 88.10%, respectively. With the increase in the number of cycles, the loss of these indicators increased. However, the peak strain increased with an average increase of 55.8%. In addition, 10 cycles are the critical point for physical and mechanical indicators of the A-D-W cycles. After 10 cycles, the changes of various indicators increase rapidly. Microscopic analysis shows that the reasons of this phenomenon were that the specimen was corroded by the sulfuric acid solution, which resulted in the development of pores and cracks and the decline of physical and mechanical properties. Conversely, the development of pores was hindered by sediment, which slowed down the decline rate of the physical and mechanical indexes of specimens, but this phenomenon disappeared with the increase of A-D-W cycles. Based on the analysis of the experimental phenomena, the constitutive model of uniaxial compression based on Weibull damage variable has been established in this article, and the model has the best effect in acid solution with less cycle times or pH value of solution greater than 6.

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Dissolution rates of actinolite and chlorite from a whole-rock experimental study of metabasalt dissolution from 2 ≤ pH ≤ 12 at 25 °C

Cited by 45 publications

References 63 publications

Acid-dissolution of antigorite, chrysotile and lizardite for ex situ carbon capture and storage by mineralisation

Acid-dissolution of antigorite, chrysotile and lizardite for ex situ carbon capture and storage by mineralisation

Using Reservoir Geology and Petrographic Observations to Improve CO2 Mineralization Estimates: Examples from the Johansen Formation, North Sea, Norway

Experimental Study on Physicomechanical Properties of Deep Sandstone by Coupling of Dry‐Wet Cycles and Acidic Environment

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