Enhanced Hydromagnesite Process for CO<sub>2</sub> Sequestration by Desilication of Serpentine Ore in NaOH Solution

Zhang, Xiaojuan; Zeng, Yan; Li, Zhibao

doi:10.1021/acs.iecr.0c01600

Cited by 7 publications

(6 citation statements)

References 58 publications

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“…Further increasing water content resulted in several crystalline phases forming, as evidenced by the addition of 150 μL of liquid water in Figure 2a. This empirical titration was necessary since commercial Mg source used in this study, while marketed as magnesite, is likely a combination of hydrated magnesium carbonate and magnesium hydroxide 49 according to its XRD pattern shown in Figure 2a. Thus, the necessary water amount to be added cannot be determined from stoichiometric considerations alone.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…In the Petri dish, the bacteria closest to the cocrystal sample were more exposed to this Zn toxic effect, which can decrease their survivability. Additionally, it is important to highlight that the presence of the plant nutrients Mg and Zn can also positively influence microorganism development since these elements are enzymatic cofactors, which are essential for microbial metabolic activity . It means that besides providing better compatibility with chemical and biological products to increase agricultural productivity, Mg(NH 4 ) 2 (CO 3 ) 2 ·4H 2 O and Zn(NH 3 )CO 3 can also promote the soil microbial community by providing essential elements for microorganism development.…”

Section: Resultsmentioning

confidence: 99%

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Mechanochemically Synthesized Nitrogen-Efficient Mg- and Zn-Ammonium Carbonate Fertilizers

Govoni Brondi,

Bortoletto-Santos,

Farias

et al. 2024

ACS Sustainable Chem. Eng.

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New scalable methods are needed to provide sustainable solutions for nutrient recovery in the form of solid fertilizer materials and their environmental stabilization from anaerobic digestion liquid byproducts. In this work, two nutrient metal containing double salts, Mg(NH 4 ) 2 (CO 3 ) 2 •4H 2 O and Zn(NH 3 )CO 3 , were synthesized using naturally abundant Mgand Zn-carbonate minerals and ammonium (bi)carbonate salts. This constituted a conceptually new synthetic approach, different from the previous work in which the aqueous solution was utilized. We also showed that the materials could be easily scaled to 20 g quantities sufficient for soil testing. The crystalline structure of the resulting materials was confirmed using powder XRD and thermal analysis showed properties distinctly different from those of parent ammonium (bi)carbonates. Accordingly, a reduction in NH 3 volatilization in soil was measured with up to 20% more NH 4 + recovered after the soil experiments at 80% water holding capacity. Further, inhibition of the agriculture-beneficial bacteria Bacillus subtillis in a nutrient medium was dramatically reduced when compared to the ammonium bicarbonate alone, suggesting decreased negative effects on soil biota. Finally, Mg(NH 4 ) 2 (CO 3 ) 2 •4H 2 O and Zn(NH 3 )CO 3 matched the kinetic nitrogen need of lettuce plants better than the ammonium carbonate control while also keeping it in a form that will be available in the future. The utility of magnesium and zinc double salts in agriculture is paramount if environmentally benign and nutrient-efficient fertilizers from liquid digestate waste are to be enabled.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Mechanochemically Synthesized Nitrogen-Efficient Mg- and Zn-Ammonium Carbonate Fertilizers

Govoni Brondi,

Bortoletto-Santos,

Farias

et al. 2024

ACS Sustainable Chem. Eng.

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“…As a result, the use of appropriate extractants is critical for indirect mineralization, which not only improves the leaching of Ca/Mg but also facilitates recovery and recycling. Li and colleagues [ 39 ] used concentrated NaOH solution for desilication and NH 3 recovery of serpentine ore. Firstly, the leaching behavior of serpentine in concentrated NaOH solution was investigated to separate SiO 2 and Mg to obtain desilicified serpentine effectively. Desilicated serpentine with up to 83 wt% MgO was leached by treatment with NH 4 Cl solution to obtain MgCl 2 solution and NH 3 , which was used to capture CO 2 .…”

Section: Mineralization Of Magnesium‐bearing Mineralsmentioning

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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“…The activation energy was estimated to be 45.5 ± 9 kJ mol −1 . Zhang et al 26 precipitated hydromagnesite from serpentine desilicated in NaOH leached in NH 4 Cl to obtain MgCl 2 . The latter was carbonated and hydromagnesite was precipitated.…”

Section: Introductionmentioning

confidence: 99%

Hydromagnesite Precipitation Kinetics in a Mixed-Suspension-Mixed-Product Removal Crystallizer of the MgO–CO₂–H₂O System Issued from Activated Serpentine Carbonation

Guermech

Mocellin

Tebbiche

et al. 2022

Ind. Eng. Chem. Res.

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The precipitation kinetics of hydromagnesite (Mg5(CO3)4·(OH)2·4(H2O)) in a MgO–CO2–H2O medium issued from a carbonation solution has been studied in a continuous mode via a mixed-suspension-mixed-product removal crystallizer. The carbonation solution is a result of the carbonation procedure of serpentine mining wastes and CO2 gas flux. The main precipitation temperature for the study was 80.0 °C. For comparative purposes, 82.5, 85.0, and 90.0 °C were also studied. Relative supersaturation was calculated via the Davies model using PHREEQC software. Kinetics parameters of linear and volumetric growth rate, nucleation rate, and the agglomeration kernel were determined for each temperature. Both the linear and volumetric growth orders were estimated to be, respectively, 0.92 and 0.91 via the correlation of empirical equations, indicating limited transport growth. The growth rate increases with temperature and supersaturation. The nucleation rate increases with the volumetric growth rate. The magma density of the solution is found to have a negative impact on the grain size if the residence time exceeds 2700 s. The mean grain size of this study is at least 1.5 times larger than those previously reported in the literature.

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Enhanced Hydromagnesite Process for CO₂ Sequestration by Desilication of Serpentine Ore in NaOH Solution

Cited by 7 publications

References 58 publications

Mechanochemically Synthesized Nitrogen-Efficient Mg- and Zn-Ammonium Carbonate Fertilizers

Mechanochemically Synthesized Nitrogen-Efficient Mg- and Zn-Ammonium Carbonate Fertilizers

Review of carbon dioxide mineralization of magnesium‐containing materials

Hydromagnesite Precipitation Kinetics in a Mixed-Suspension-Mixed-Product Removal Crystallizer of the MgO–CO₂–H₂O System Issued from Activated Serpentine Carbonation

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Enhanced Hydromagnesite Process for CO2 Sequestration by Desilication of Serpentine Ore in NaOH Solution

Cited by 7 publications

References 58 publications

Mechanochemically Synthesized Nitrogen-Efficient Mg- and Zn-Ammonium Carbonate Fertilizers

Mechanochemically Synthesized Nitrogen-Efficient Mg- and Zn-Ammonium Carbonate Fertilizers

Review of carbon dioxide mineralization of magnesium‐containing materials

Hydromagnesite Precipitation Kinetics in a Mixed-Suspension-Mixed-Product Removal Crystallizer of the MgO–CO2–H2O System Issued from Activated Serpentine Carbonation

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Enhanced Hydromagnesite Process for CO₂ Sequestration by Desilication of Serpentine Ore in NaOH Solution

Hydromagnesite Precipitation Kinetics in a Mixed-Suspension-Mixed-Product Removal Crystallizer of the MgO–CO₂–H₂O System Issued from Activated Serpentine Carbonation