Mineralization of calcium carbonate by controlled release of carbonate in aqueous solution

Faatz, Michael; Gröhn, Franziska; Wegner, Gerhard

doi:10.1016/j.msec.2005.01.005

Cited by 52 publications

(37 citation statements)

References 23 publications

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“…Faatz et al showed that calcium carbonate precipitants can be successfully produced using the controllable hydrolysis of DMC to provide carbonate. They also found that the by-product of DMC decomposition, methanol, does not negatively affect the carbonate deposition [7,12].…”

Section: Calcium Carbonate Deposition By Hydrolysis Of Dimethyl Carbomentioning

confidence: 95%

Surface treatment of concrete bricks using calcium carbonate precipitation

Amidi

Wang

2015

Construction and Building Materials

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Section: Calcium Carbonate Deposition By Hydrolysis Of Dimethyl Carbomentioning

confidence: 95%

Surface treatment of concrete bricks using calcium carbonate precipitation

Amidi

Wang

2015

Construction and Building Materials

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“…Calcite is usually formed at a high solution pH and low temperature, while vaterite and aragonite are formed at a low solution pH and high temperature. They are transformed to stable calcite since vaterite is unstable crystal morphology [4][5][6]. The ACC (amorphous calcium carbonate) forms in the initial stage of calcium carbonate reaction, and it is transformed into vaterite, aragonite and calcite [7][8][9][10].…”

Section: Intoductionmentioning

confidence: 99%

Biomineralization of calcium carbonate by adding aspartic acid and lysozyme

Song

Kim

2011

Korean J. Chem. Eng.

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Calcium carbonate is one of the most abundant materials present in nature. Crystal structures of CaCO 3 become three polymorphic modifications, namely calcite, aragonite and vaterite. Polymorphic modifications are mediated by adding aspartic acid (Asp) and lysozyme. Lysozyme, which is a major component of egg white proteins, has influenced the calcification of avian eggshells. The influence of Asp and lysozyme on the crystallization of CaCO 3 was investigated by adding these additives and calcium chloride solution into sodium carbonate solution in a crystallization vessel. CaCO 3 crystals were analyzed by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and Fourier transform infrared spectrometry (FT-IR). XRD was used to select the intensities and crystal structure of specific calcium carbonate. SEM was employed for the analysis of the morphology of the precipitation and particle size. Two kinds of crystals were identified by FT-IR spectrum. Hexagonal crystals of vaterite were affected by the Asp in the crystallization solution. However, rhombohedral crystals of calcite by lysozyme were formed without any sign of vaterite. INTODUCTIONCaCO 3 crystal is essential to form the frame of an organism and has contributed to synthesis of nanomaterials. In biomineralization, calcium carbonate (CaCO 3 ) is one of the most abundant mineral resources formed in the natural environment. CaCO 3 has increasingly attracted interest and industrial demand has increased for several years on account of physical and chemical properties of CaCO 3 . Therefore, crystallization of calcium carbonate was extensively studied as it is widely used in the paper, paint, rubber and biomedical application [1]. The application of calcium carbonate particles is determined by several factors, such as particle morphology, specific surface area, particle size, particle size distribution [2]. Calcium carbonate exhibits three polymorphic modifications (rhombic calcite, needlelike aragonite and spherical vaterite) [1]. Crystal properties can be controlled by modifying the reaction medium using surfactants, suspensions, additives and precipitation conditions such as pH [3] and temperature. Calcite is usually formed at a high solution pH and low temperature, while vaterite and aragonite are formed at a low solution pH and high temperature. They are transformed to stable calcite since vaterite is unstable crystal morphology [4-6]. The ACC (amorphous calcium carbonate) forms in the initial stage of calcium carbonate reaction, and it is transformed into vaterite, aragonite and calcite [7-10].The gas-liquid reaction of CaCO 3 is that CO 2 gas is absorbed into calcium hydroxide solution. CaCl 2 -Na 2 CO 3 represents liquid-liquid reaction. The liquid-liquid reaction for CaCO 3 crystallization makes both CaCO 3 crystals and NaCl byproduct as Eq. (1) CaCl 2 (aq)+Na 2 CO 3 (aq)→CaCO 3 (sol)+2NaCl (byproduct) (1) This is because the reaction easily controls saturation concentration in solution and produces various morphologies of CaCO 3...

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“…The authors assigned this behavior to an unlimited excess of water during the in vitro reaction. Recently, Faatz, Grohn, and Wegner [100,101] reported that amorphous calcium carbonate spheres can be generated from solution without any additives by the controlled release of carbonate ions, and that the formation of vaterite nanoparticles was induced by a polymer surfactant. This, in a simplified view, would be consistent with two major roles of enzymes in biomineralization: the control of diffusion, on the one hand, and the control of interfacial interactions, on the other.…”

Section: Propagation Of Thermodynamically Unstable Amorphous Phasesmentioning

confidence: 99%