Control of the morphology, specific surface area and agglomeration of precipitated calcium carbonate crystals through a multiphase carbonation process

Ghiasi, Meisam; Abdollahy, Mahmoud; Khalesi, Mohammad Reza; Ghiasi, Ehsan

doi:10.1039/c9ce01876j

Cited by 20 publications

(9 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Given the importance of CaCO 3 as a filler/extender for the production of paper, paints, plastics, food, pharmaceuticals, and cosmetics 1 , 2 , much attention has been drawn to the synthesis of high-purity CaCO 3 particles with controlled crystallographic and morphological characteristics 3 , 4 . Aragonite is the best filler material among the three CaCO 3 polymorphs (calcite, aragonite, and vaterite) for paper and plastics industries, and a more useful additive for the biomedical industry 3 , 5 – 8 .…”

Section: Introductionmentioning

confidence: 99%

“…At present, CaCO 3 particles are produced using the lime-soda process, the CaCl 2 (Solvay) process, or carbonation, during which CO 2 is bubbled into a solution of Ca(OH) 2 . Carbonation is a relatively environmentally friendly and potentially carbon neutral process, as Ca(OH) 2 is commonly prepared by heating limestone (CaCO 3 ), which is accompanied by the release of CO 2 (CaCO 3 → CaO + CO 2 ; CaO + H 2 O → Ca(OH) 2 ; Ca(OH) 2 + CO 2 → CaCO 3 + H 2 O) 4 , 9 .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Enhancement of aragonite mineralization with a chelating agent for CO2 storage and utilization at low to moderate temperatures

Wang

Watanabe

Inomoto

et al. 2021

Sci Rep

View full text Add to dashboard Cite

Among the CaCO3 polymorphs, aragonite demonstrates a better performance as a filler material in the paper and plastic industries. Despite being ideal from the environmental protection perspective, the production of aragonite particles via CO2 mineralization of rocks is hindered by the difficulty in achieving high production efficiencies and purities, which, however, can be mitigated by exploiting the potential ability of chelating agents on metal ions extraction and carbonation controlling. Herein, chelating agent N,N-dicarboxymethyl glutamic acid (GLDA) was used to enhance the extraction of Ca from calcium silicate and facilitate the production of aragonite particles during the subsequent Ca carbonation. CO2 mineralization was promoted in the presence of 0.01–0.1 M GLDA at ≤ 80 °C, with the maximal CaCO3 production efficiency reached 308 g/kg of calcium silicate in 60 min using 0.03 M GLDA, which is 15.5 times higher than that without GLDA. In addition, GLDA showed excellent effects on promoting aragonite precipitation, e.g., the content of aragonite was only 5.1% in the absence of GLDA at 50 °C, whereas highly pure (> 90%, increased by a factor of 18) and morphologically uniform aragonite was obtained using ≥ 0.05 M GLDA under identical conditions. Aragonite particle morphologies could also be controlled by varying the GLDA concentration and carbonation temperature. This study proposed a carbon-negative aragonite production method, demonstrated the possibility of enhanced and controlled aragonite particle production during the CO2 mineralization of calcium silicates in the presence of chelating agents.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhancement of aragonite mineralization with a chelating agent for CO2 storage and utilization at low to moderate temperatures

Wang

Watanabe

Inomoto

et al. 2021

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Moreover, vaterite could exist with calcite, as they exhibit similar peaks at 874 cm -1 , while the aragonite band appears at 855 cm -1 [10]. In addition, vaterite shows a peak at 745 cm -1 [11].…”

Section: Phosphate Removalmentioning

confidence: 99%

Phosphate Removal with pH‐Responsive Calcium Carbonate Nanoparticles

et al. 2022

View full text Add to dashboard Cite

Increasing use and excessive release of phosphate cause eutrophication. In this work, calcium carbonate nanoparticles were produced and modified to remove phosphate from water. The calcium carbonate nanoparticles were synthesized through wet carbonation with polyethylene glycol and sodium dodecyl sulfate added to limit particle size. Iron was incorporated into the calcium carbonate nanoparticles to improve phosphate removal. The BET surface area of CaCO 3 was significantly improved after Fe incorporation. Phosphate removal was enhanced from 50 to 90 % within minutes. More importantly, the adsorption behavior of CaCO 3 -Fe was different from that of the pH-responsive CaCO 3 material. Phosphate adsorption was reduced in alkaline solution due to the decreased positive surface charge of CaCO 3 -Fe for interaction with phosphate.

show abstract

“…Two basic oxides, CaO and MgO, were added to the soil samples, respectively, and CO 2 present in the air was an acidic oxide, so the hydrolysis and carbonization of CaO and MgO must have caused a change in the pH of the soil samples. Figure 5 shows that the dissociation reaction of CaO and MgO leads to an increase in the concentration of Ca 2+ and Mg 2+ in the pore water, causing an increase in pH [18]. Since CaO and MgO hydrate to produce Ca(OH) 2 and Mg(OH) 2 , and the higher the admixture, the more products, the more alkaline the soil sample [19].…”

Section: Effect Of Slaking Time On Phmentioning

confidence: 99%

Experimental Study on Restoration Materials of Newly Earthen Ruins under Different Slaking Times

Yue

Zhu

et al. 2022

Materials

View full text Add to dashboard Cite

The newly repaired Kaifeng City Wall has serious cracks, shedding and other issues on the surface, which constitute a significant problem. It is of great significance for the restoration of Kaifeng City Wall to explore the repair materials and techniques suitable for Kaifeng City Wall. The pH, particle gradation, compressive strength and SEM were tested on soil samples with different lime and MgO contents under different slaking times. With the increase of slaking time, the pH value first increased and then decreased. The relationship between pH value and strength showed three stages. The strength of lime-containing soil samples increased first, then decreased and then increased. The MgO content of soil samples showed an opposite trend. The particle gradation was significantly improved with increasing aging time. The main reason for the reduction of soil strength is the calcium carbonate crystals and magnesite microcracks produced by lime and MgO in the later stage of slaking.

show abstract

Control of the morphology, specific surface area and agglomeration of precipitated calcium carbonate crystals through a multiphase carbonation process

Abstract: The morphology of precipitated calcium carbonate is a function of conductivity.

Cited by 20 publications

References 47 publications

Enhancement of aragonite mineralization with a chelating agent for CO2 storage and utilization at low to moderate temperatures

Enhancement of aragonite mineralization with a chelating agent for CO2 storage and utilization at low to moderate temperatures

Phosphate Removal with pH‐Responsive Calcium Carbonate Nanoparticles

Experimental Study on Restoration Materials of Newly Earthen Ruins under Different Slaking Times

Contact Info

Product

Resources

About