A Mechanistic Study of Carbonic Anhydrase‐Enhanced Calcite Dissolution

Dong, Sijia; Berelson, William M.; Teng, Hualiang; Rollins, Nick; Pirbadian, Sahand; El‐Naggar, Mohamed Y.; Adkins, Jess F.

doi:10.1029/2020gl089244

Cited by 3 publications

(4 citation statements)

References 41 publications

(59 reference statements)

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“…It is likely that metabolic activity drives a substantial portion of alkalinity regeneration, both in the water column as shown here, and in shallow and deep ocean sediments (Burdige et al., 2010; Emerson & Archer, 1990; Emerson & Bender, 1981; Steiner et al., 2019). This mechanism also allows for the intimate association of CaCO 3 and the enzyme carbonic anhydrase to elevate dissolution rates (Dong, Berelson, Teng, et al., 2020; Subhas et al., 2017; Subhas, Adkins, et al., 2019).…”

Section: Resultsmentioning

confidence: 99%

Shallow Calcium Carbonate Cycling in the North Pacific Ocean

Subhas

Dong

Naviaux³

et al. 2022

Global Biogeochemical Cycles

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Section: Resultsmentioning

confidence: 99%

Shallow Calcium Carbonate Cycling in the North Pacific Ocean

Subhas

Dong

Naviaux³

et al. 2022

Global Biogeochemical Cycles

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“…. [68][69][70][71] This increases the supersaturation relative to magnesium carbonate. Caulfield et al [72] investigated the effect of carbonic anhydrase (CA) in favor of magnesium carbonate (Mg) precipitation at low temperatures and low p CO 2 .…”

Section: Microorganismsmentioning

confidence: 99%

“…CA is an enzyme that accelerates the hydration of CO 2 , facilitating its conversion to HCO 3 − and then to CO 3 2 − . [ 68–71 ] This increases the supersaturation relative to magnesium carbonate. Caulfield et al [ 72 ] investigated the effect of carbonic anhydrase (CA) in favor of magnesium carbonate (Mg) precipitation at low temperatures and low p CO 2 .…”

Section: Factors Influencing the Synthesis Of Magnesium Carbonatementioning

confidence: 99%

Review of carbon dioxide mineralization of magnesium‐containing materials

Li,

Luo,

Wang

et al. 2023

Carbon Neutralization

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The increasing utilization of fossil fuels and industrial activities has resulted in a surge of CO2 emissions, which have significantly impacted global climate change. Carbon capture and utilization technologies offer a promising solution to decrease atmospheric CO2 concentrations and convert CO2 into valuable products. This study focuses on the capture and storage of CO2 through the mineralization of magnesium‐containing materials. The analysis encompasses the mineralization process of solid and liquid minerals, the various mineralization processes of magnesium‐containing minerals categorized as direct and indirect mineralization, and the latest research advancements in magnesium‐containing minerals. Brine and seawater from salt lakes are considered the most appropriate materials for mineralization due to their abundance and the simplicity of the process compared to solid mineralization. This paper analyzes the impact of temperature, impurity ions, additives, and microorganisms on the process of magnesium carbonate synthesis crystallization. The use of magnesium‐containing materials for carbon dioxide sequestration can effectively reduce carbon emission. The review offers guidance on carbon dioxide mineralization and explores the potential applications of magnesium mineralization.

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“…It has been suggested that the above mechanisms of CA are involved in the controlled growth of calcareous structures like shells (Rodriguez-Navarro et al, 2019). Carbonic anhydrase has also been demonstrated to catalyze the dissolution of calcite, possibly by catalyzing the transfer of protons into the mineral lattice during protonation of CO 2− 3 (Dong et al, 2020). Multicellular and unicellular organisms also demonstrate exquisite control over carbonate precipitation using combinations of the aforementioned mechanisms during the formation of shells and intracellular carbonate inclusions.…”

Section: Siderophoresmentioning

confidence: 99%

Geochemical Negative Emissions Technologies: Part I. Review

et al. 2022

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Over the previous two decades, a diverse array of geochemical negative emissions technologies (NETs) have been proposed, which use alkaline minerals for removing and permanently storing atmospheric carbon dioxide (CO2). Geochemical NETs include CO2 mineralization (methods which react alkaline minerals with CO2, producing solid carbonate minerals), enhanced weathering (dispersing alkaline minerals in the environment for CO2 drawdown) and ocean alkalinity enhancement (manipulation of ocean chemistry to remove CO2 from air as dissolved inorganic carbon). CO2 mineralization approaches include in situ (CO2 reacts with alkaline minerals in the Earth's subsurface), surficial (high surface area alkaline minerals found at the Earth's surface are reacted with air or CO2-bearing fluids), and ex situ (high surface area alkaline minerals are transported to sites of concentrated CO2 production). Geochemical NETS may also include an approach to direct air capture (DAC) that harnesses surficial mineralization reactions to remove CO2 from air, and produce concentrated CO2. Overall, these technologies are at an early stage of development with just a few subjected to field trials. In Part I of this work we have reviewed the current state of geochemical NETs, highlighting key features (mineral resources; processes; kinetics; storage durability; synergies with other NETs such as DAC, risks; limitations; co-benefits, environmental impacts and life-cycle assessment). The role of organisms and biological mechanisms in enhancing geochemical NETs is also explored. In Part II, a roadmap is presented to help catalyze the research, development, and deployment of geochemical NETs at the gigaton scale over the coming decades.

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A Mechanistic Study of Carbonic Anhydrase‐Enhanced Calcite Dissolution

Abstract: Carbonic anhydrase (CA) has been shown to promote calcite dissolution (Liu, 2001, https://

Cited by 3 publications

References 41 publications

Shallow Calcium Carbonate Cycling in the North Pacific Ocean

Shallow Calcium Carbonate Cycling in the North Pacific Ocean

Review of carbon dioxide mineralization of magnesium‐containing materials

Geochemical Negative Emissions Technologies: Part I. Review

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