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Calcium carbonates

Surface Modification and Planar Defects of Calcium Carbonates by Magnetic Water Treatment

Surface Modification and Planar Defects of Calcium Carbonates by Magnetic Water Treatment

... Powdery calcium carbonates, predominantly calcite and aragonite, with planar defects and cation–anion mixed surfaces as deposited on low-carbon steel by mag- netic water treatment (MWT) were characterized ...

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The influence of the amount and the origin of calcium carbonates on the isotopically exchangeable phosphate in calcareous soils

The influence of the amount and the origin of calcium carbonates on the isotopically exchangeable phosphate in calcareous soils

... In soils from the Cretaceous Chalk, the first-order rate of isotopic exchange of the ' slow' phosphate fraction was constant. It increased to a larger but constant value in the soils inc[r] ...

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Precipitation of solid phase calcium carbonates and their effect on application of seawater models

Precipitation of solid phase calcium carbonates and their effect on application of seawater models

... surfaces (solid or soluble phases). Pseudo-homogeneous pre- cipitation occurs on soluble colloidal particles, microbes, planktonic debris, and POC or reaction vessel surfaces (Morse and He, 1993). Heterogeneous ...

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Atmospheric CO2 sequestration in iron and steel slag: Consett, Co  Durham, UK

Atmospheric CO2 sequestration in iron and steel slag: Consett, Co Durham, UK

... leachate over barrages where a hydraulic head is suitable); 10,41 (b) settlement lagoons to allow the accumulation and ready recovery of precipitated calcium carbonates (e.g., ref 59); and (c) residual bu ff ...

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Synthesis and Characterisation of CaCO3 (Calcite) Nano Particles from Cockle Shells Using Chitosan as Precursor

Synthesis and Characterisation of CaCO3 (Calcite) Nano Particles from Cockle Shells Using Chitosan as Precursor

... Abstract- Calcium carbonate nano particles were synthesized using precipitation method from cockle shells by employing chitosan as ...Synthesized Calcium carbonates were characterized using scanning ...

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Characterisation of Calcium Carbonate Formed by Bacillus sphaericus Using Urea

Characterisation of Calcium Carbonate Formed by Bacillus sphaericus Using Urea

... of calcium carbonates among the ...of calcium carbonates which consisted of symmetric stretching, out-of-plane bending, double degenerate planar asymmetric stretching and double degenerate ...

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...  Temporary hardness may be removed by boiling the water so that the bicarbonate salts get decomposed to form insoluble calcium carbonates and magnesium hydroxide, which may be s[r] ...

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Novel geochemical fingerprints of biogenicity applied to ancient carbonates

Novel geochemical fingerprints of biogenicity applied to ancient carbonates

... In view of its importance for geochemical signal preservation, the effect of diagenetic modification of carbonate chemistry has been investigated. Webb et al. (2009) established that during the neomorphism of calcite ...

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Transport-controlled hydrothermal replacement of calcite by Mg-carbonates

Transport-controlled hydrothermal replacement of calcite by Mg-carbonates

... Reactive transport models are 33 used to predict the rates and spatial patterns of dolomitization e.g., Wilson et al., 2001; 34 Jones and Xiao, 2005; Whitaker and Xiao, 2010 and apply da[r] ...

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The role of amorphous precursors in the crystallization of La and Nd carbonates.

The role of amorphous precursors in the crystallization of La and Nd carbonates.

... 03-065-3184). EDX spectra from the neodymium amorphous precursor and cubic Nd-oxide showed the same Nd : O ratios as those obtained in the experiment with La (i.e. ∼ 2 : 8 and ∼ 2 : 3, before and after significant ...

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Lithostratigraphy, sedimentology and diagenesis of the Ordovician carbonates, southern Thailand

Lithostratigraphy, sedimentology and diagenesis of the Ordovician carbonates, southern Thailand

... Veizer, 1986, Ordovician spars in the Gordon Limestone, Tasmania Wang and Rao, 1989, and Ordovician cements from Nevada Ross et al., 1975, the 18Q values of marine cements in the Thung S[r] ...

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1 Quick, Easy and Economic Mineralogical Studies of

1 Quick, Easy and Economic Mineralogical Studies of

... Keywords: flooded chalk; Raman spectroscopy; Enhanced Oil Recovery; carbonates; calcite; magnesite.. Introduction 33.[r] ...

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The structure of carbonate melts and implications for the petrogenesis of carbonatite magmas

The structure of carbonate melts and implications for the petrogenesis of carbonatite magmas

... Unlike the rare earth bearing system the MgCOj-KiCOj glasses are highly hygroscopic due to the high concentrations of MgCOj, and rapid hydration of this component to crystalline hydrous magnesium carbonates occurs ...

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Methane Seep Carbonates Host Distinct, Diverse, and Dynamic Microbial Assemblages

Methane Seep Carbonates Host Distinct, Diverse, and Dynamic Microbial Assemblages

... colonization carbonates might never host microbial assemblages completely similar to the native carbonates, considering the different history of colonization car- bonates (located at the seabed) and native ...

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Detection of carbonates in water softeners

Detection of carbonates in water softeners

... Conclusions: Not all products containing "bath salt" contain bicarbonate. Budget bath salts in the composition have sodium chloride or sodium lauryl sulphate, but they do not contain bicarbonate. Micellar ...

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Modification of Argillous Raw Materials by Additives Comprising Carbonates

Modification of Argillous Raw Materials by Additives Comprising Carbonates

... 25% of OUP additive facilitate a formation of system of pores (with diameter up to 50 µm), local cavities (with dieameter up to 400 µm) and rounded aggregates with a tendency for mechanical destruction and further ...

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Modeling and Molecular Dyanamics Simulations Study of Enol-carbonates and their Derivatives

Modeling and Molecular Dyanamics Simulations Study of Enol-carbonates and their Derivatives

... Deprotection of enol-carbonates leads to free α, β-dihydroxyketone - a unit which is a common structural motive of many natural products and physiologically active compounds which recommended molecules for further ...

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Direct Evidence for Glucose Consumption Acceleration by Carbonates in ‎Cultured Cells

Direct Evidence for Glucose Consumption Acceleration by Carbonates in ‎Cultured Cells

... but its water solubility is quite low (0.7–0.8 g/L). Indeed, the pH value of commercial Mt. Fuji subsoil water (Healthy Vana Water) containing 130 μg/L vanadium was 8.3 [24]. If vanadium-containing water can be prepared ...

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Innovative CO2 Injections in Carbonates and Advanced Modelling for Numerical Investigation

Innovative CO2 Injections in Carbonates and Advanced Modelling for Numerical Investigation

... Pair seal-reservoir is located at the depth of 900 in the top of the dome and 1832 m in flanks. Marly Lias and Pozazal form the main seal (160 m thick) comprised of marls, shales, limestones and calcareous mud stones. ...

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Mechanisms of Surface Charge Modification of Carbonates in Aqueous Electrolyte Solutions

Mechanisms of Surface Charge Modification of Carbonates in Aqueous Electrolyte Solutions

... In particular, we exploited the surface-enhanced infrared absorption phenomena of a model phosphoester on U(IV) nanoparticles for the first time to examine the heterogeneous reaction mec[r] ...

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