Modification of calcium carbonate surface properties: macroscopic and microscopic investigations

2014 ◽  
pp. 415-428
Keyword(s):  
Calcium Carbonate ◽  
Surface Properties ◽  
Microscopic Investigations

Surface properties of a calcium carbonate filler treated with stearic acid

1984 ◽  
Vol 20 (12) ◽  
pp. 1155-1158 ◽  
Author(s):  
E. Papirer ◽  
J. Schultz ◽  
C. Turchi
Keyword(s):  
Calcium Carbonate ◽  
Stearic Acid ◽  
Surface Properties ◽  
Carbonate Filler

scholarly journals Effects of Phosphorus in Growth Media on Biomineralization and Cell Surface Properties of Marine Cyanobacteria Synechococcus

Geosciences ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 471 ◽  
Author(s):  
Carlos Paulo ◽  
Janice Kenney ◽  
Per Persson ◽  
Maria Dittrich
Keyword(s):  
Calcium Carbonate ◽  
Cell Surface ◽  
Surface Properties ◽  
Photoelectron Spectroscopy ◽  
Relative Proportion ◽  
Growth Media ◽  
Carbonate Precipitation ◽  
Cell Surfaces ◽  
Carbonate Formation ◽  
Cell Envelopes

Through geological time, cyanobacterial picoplankton have impacted the global carbon cycle by sequestrating CO2 and forming authigenic carbonate minerals. Various studies have emphasized the cyanobacterial cell envelopes as nucleation sites for calcium carbonate formation. Little is known, however, about how environmental conditions (e.g., nutrient content) trigger a cell surface and its properties and, consequently, influence biomineralization. Our study aims to understand how phosphorus (P) concentration impacts the properties of cell surfaces and cell–mineral interactions. Changes to the surface properties of marine Synechococcus strains grown under various P conditions were characterized by potentiometric titrations, X-ray photoelectron spectroscopy (XPS), and tip-enhanced Raman spectroscopy (TERS). Biomineralization experiments were performed using cyanobacterial cells, which were grown under different P concentrations and exposed to solutions slightly oversaturated with respect to calcium carbonate. We observed the changes induced by different P conditions in the macromolecular composition of the cyanobacteria cell envelope and its consequences for biomineralization. The modified properties of cell surfaces were linked to carbonate precipitation rates and mineral morphology from biomineralization experiments. Our analysis shows that the increase of phosphoryl groups and surface charge, as well as the relative proportion of polysaccharides and proteins, can impact carbonate precipitation by picocyanobacteria.

Synthesis of Calcium Carbonate Particles Modified by Coating with Nickel Precursor

2005 ◽  
Vol 486-487 ◽  
pp. 546-549 ◽  
Author(s):  
Kyung Nam Kim ◽  
Yong Do Kim
Keyword(s):  
Calcium Carbonate ◽  
Surface Properties ◽  
Nickel Hydroxide ◽  
Pure Water ◽  
Aqueous System ◽  
Precipitation Method ◽  
Homogeneous Precipitation ◽  
Homogeneous Precipitation Method ◽  
Forced Hydrolysis ◽  
Homogeneous Decomposition

CaCO3 powders were prepared by the homogeneous precipitation method using CaCl2, urea as the starting materials. Uniform CaCO3(calcite, aragonite, vaterite) powders were obtained by various conditions. The surfaces of CaCO3 powders were modified by coating them with a lithium precursor using two different precipitation techniques: homogeneous decomposition of precipitating agents(urea, NaHCO3, NH4HCO3) and forced hydrolysis in pure water. Selecting the Ni(NO3)26H2O and urea(or NaHCO3, NH4HCO3) as Ni-source and precipitating agent respectively, the NiO could be uniformly coated on the CaCO3 powder in the aqueous system. The coating NiO layer dominated the surface properties of the coated lime powders. Calcination of these nickel hydroxide crystals in air at 500°C transformed them into NiO.

scholarly journals Surface properties of calcium carbonate modified with silica by sol-gel method

2016 ◽  
Vol 497 ◽  
pp. 1-7 ◽  
Author(s):  
Jorge Pedrosa ◽  
J.A.F. Gamelas ◽  
Ana F. Lourenço ◽  
Paulo J. Ferreira
Keyword(s):  
Calcium Carbonate ◽  
Surface Properties ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method

Effect of surface properties of calcium carbonate on aggregation process investigated by molecular dynamics simulation

2013 ◽  
Vol 49 (4) ◽  
pp. 1724-1733 ◽  
Author(s):  
Kazunori Kadota ◽  
Ryoichi Furukawa ◽  
Yoshiyuki Shirakawa ◽  
Atsuko Shimosaka ◽  
Jusuke Hidaka
Keyword(s):  
Molecular Dynamics ◽  
Calcium Carbonate ◽  
Molecular Dynamics Simulation ◽  
Surface Properties ◽  
Dynamics Simulation ◽  
Aggregation Process ◽  
Effect Of Surface
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