scholarly journals Co-incorporation of alkali metal ions during amorphous calcium carbonate precipitation and their stabilizing effect

2019 ◽  
Vol 21 (24) ◽  
pp. 13230-13233 ◽  
Author(s):  
Anders C. S. Jensen ◽  
Henrik Birkedal ◽  
Luca Bertinetti
Keyword(s):  
Thermal Stability ◽  
Calcium Carbonate ◽  
Alkali Metal ◽  
Metal Ions ◽  
Alkali Metal Ions ◽  
Carbonate Precipitation ◽  
Amorphous Calcium Carbonate ◽  
Calcium Carbonate Precipitation ◽  
Stabilizing Effect

Alkali metal ions incorporate in amorphous calcium carbonate and affect its thermal stability.

scholarly journals Calcite seed-assisted microbial induced carbonate precipitation (MICP) and its potential in biocementation

2020 ◽  
Author(s):  
Jennifer Zehner ◽  
Anja Røyne ◽  
Pawel Sikorski
Keyword(s):  
Calcium Carbonate ◽  
Crystallization Process ◽  
Biological Process ◽  
Precipitation Process ◽  
Carbonate Precipitation ◽  
Amorphous Calcium Carbonate ◽  
Calcium Carbonate Precipitation ◽  
Mineral Precipitation ◽  
Solid Materials ◽  
Significant Difference

Microbial-induced calcium carbonate precipitation (MICP) is a biological process inducing biomineralization of CaCO3. This can be used to form a solid, concrete-like material. To be able to use MICP successfully for producing solid materials, it is important to understand the formation process of the material in detail. It is well known, that crystallization surfaces can influence the precipitation process. Therefore, we present in this contribution a systematic study investigating the influence of calcite seeds on the MICP processes. We focus on the pH changes during the crystallization process measured with absorption spectroscopy and on the optical density (OD) signal to analyze the precipitation process. Furthermore, optical microscopy was used to visualize the precipitation processes in the sample and connect them to changes in pH and OD. We show that there is a significant difference in the pH evolution between samples with and without calcite seeds present and that the shape of the pH evolution and the changes in OD can give detailed information about the mineral precipitation and transformations. In the presented experiments we show that amorphous calcium carbonate (ACC) can also precipitate in the presence of initial calcite seeds, which can have consequences for consolidated MICP materials.

Influence of alkali metal ions on thermal stability of Bi-activated NIR-emitting alkali-aluminoborosilicate glasses

2014 ◽  
Vol 12 (11) ◽  
pp. 111601-111605 ◽  
Author(s):  
Ronghua Wan Ronghua Wan ◽  
Zhiguo Song Zhiguo Song ◽  
Yongjin Li Yongjin Li ◽  
Qun Liu Qun Liu ◽  
Yuting Zhou Yuting Zhou ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Alkali Metal ◽  
Metal Ions ◽  
Alkali Metal Ions ◽  
Thermal Stability Of

scholarly journals Amorphous Calcium Carbonate Precipitation by Cellular Biomineralization in Mantle Cell Cultures of Pinctada fucata

PLoS ONE ◽  
2014 ◽  
Vol 9 (11) ◽  
pp. e113150 ◽  
Author(s):  
Liang Xiang ◽  
Wei Kong ◽  
Jingtan Su ◽  
Jian Liang ◽  
Guiyou Zhang ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Cell Cultures ◽  
Pinctada Fucata ◽  
Carbonate Precipitation ◽  
Amorphous Calcium Carbonate ◽  
Calcium Carbonate Precipitation ◽  
Mantle Cell

scholarly journals Mineralogy of microbially induced calcium carbonate precipitates formed using single cell drop-based microfluidics

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Neerja M. Zambare ◽  
Nada Y. Naser ◽  
Robin Gerlach ◽  
Connie B. Chang
Keyword(s):  
Calcium Carbonate ◽  
Cell Encapsulation ◽  
Carbonate Precipitation ◽  
Interior Structure ◽  
Amorphous Calcium Carbonate ◽  
Calcium Carbonate Precipitation ◽  
Mineral Precipitation ◽  
E Coli ◽  
Precipitate Nucleation ◽  
Over Time

Abstract Microbe-mineral interactions are ubiquitous and can facilitate major biogeochemical reactions that drive dynamic Earth processes such as rock formation. One example is microbially induced calcium carbonate precipitation (MICP) in which microbial activity leads to the formation of calcium carbonate precipitates. A majority of MICP studies have been conducted at the mesoscale but fundamental questions persist regarding the mechanisms of cell encapsulation and mineral polymorphism. Here, we are the first to investigate and characterize precipitates on the microscale formed by MICP starting from single ureolytic E. coli MJK2 cells in 25 µm diameter drops. Mineral precipitation was observed over time and cells surrounded by calcium carbonate precipitates were observed under hydrated conditions. Using Raman microspectroscopy, amorphous calcium carbonate (ACC) was observed first in the drops, followed by vaterite formation. ACC and vaterite remained stable for up to 4 days, possibly due to the presence of organics. The vaterite precipitates exhibited a dense interior structure with a grainy exterior when examined using electron microscopy. Autofluorescence of these precipitates was observed possibly indicating the development of a calcite phase. The developed approach provides an avenue for future investigations surrounding fundamental processes such as precipitate nucleation on bacteria, microbe-mineral interactions, and polymorph transitions.

Coprecipitation of alkali metal ions with calcium carbonate

1986 ◽  
Vol 50 (1) ◽  
pp. 49-58 ◽  
Author(s):  
Minoru Okumura ◽  
Yasushi Kitano
Keyword(s):  
Calcium Carbonate ◽  
Alkali Metal ◽  
Metal Ions ◽  
Alkali Metal Ions

scholarly journals Nanoscale kinetics of amorphous calcium carbonate precipitation in H2O and D2O

2020 ◽  
Vol 22 (38) ◽  
pp. 22107-22115
Author(s):  
Peter D. Morris ◽  
Ian J. McPherson ◽  
Gabriel N. Meloni ◽  
Patrick R. Unwin
Keyword(s):  
Calcium Carbonate ◽  
Carbonate Precipitation ◽  
Amorphous Calcium Carbonate ◽  
Calcium Carbonate Precipitation ◽  
Kinetics Of

Electrophoretic mixing of CaCl2 and NaHCO3 solutions in a nanopipette enables CaCO3 precipitation to be followed at the nanoscale.

scholarly journals Calcite seed-assisted microbial induced carbonate precipitation (MICP)

PLoS ONE ◽  
2021 ◽  
Vol 16 (2) ◽  
pp. e0240763
Author(s):  
Jennifer Zehner ◽  
Anja Røyne ◽  
Pawel Sikorski
Keyword(s):  
Calcium Carbonate ◽  
Systematic Study ◽  
Biological Process ◽  
Precipitation Process ◽  
Carbonate Precipitation ◽  
Amorphous Calcium Carbonate ◽  
Calcium Carbonate Precipitation ◽  
Mineral Precipitation ◽  
Solid Materials ◽  
Significant Difference

Microbial-induced calcium carbonate precipitation (MICP) is a biological process inducing biomineralization of CaCO3. This can be used to form a solid, concrete-like material. To be able to use MICP successfully to produce solid materials, it is important to understand the formation process of the material in detail. It is well known that crystallization surfaces can influence the precipitation process. Therefore, we present in this contribution a systematic study investigating the influence of calcite seeds on the MICP process. We focus on the changes in the pH and changes of the optical density (OD) signal measured with absorption spectroscopy to analyze the precipitation process. Furthermore, optical microscopy was used to visualize the precipitation processes in the sample and connect them to changes in the pH and OD. We show, that there is a significant difference in the pH evolution between samples with and without calcite seeds present and that the shape of the pH evolution and the changes in OD can give detailed information about the mineral precipitation and transformations. In the presented experiments we show, that amorphous calcium carbonate (ACC) can also precipitate in the presence of initial calcite seeds and this can have implications for consolidated MICP materials.

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