The dependence of silicate dissolution rates on their structure and composition

2021 ◽  
pp. 153-156
Author(s):  
E.H. Oelkers ◽  
J. Schott
Keyword(s):  
Dissolution Rates ◽  
Silicate Dissolution

Controls on silicate dissolution rates in neutral and basic pH solutions at 25°C

1989 ◽  
Vol 53 (11) ◽  
pp. 2823-2830 ◽  
Author(s):  
Patrick V. Brady ◽  
John V. Walther
Keyword(s):  
Dissolution Rates ◽  
Silicate Dissolution

The dependence of silicate dissolution rates on their structure and composition

2021 ◽  
pp. 165-168
Author(s):  
Wang Min ◽  
Wu Yongfeng ◽  
Zhong Zuoxin ◽  
Tang Minggao
Keyword(s):  
Dissolution Rates ◽  
Silicate Dissolution

scholarly journals Rate controls on silicate dissolution in cementitious environments

2017 ◽  
Vol 2 ◽  
pp. 67-73 ◽  
Author(s):  
Tandre Oey ◽  
Yi-Hsuan Hsiao ◽  
Erika Callagon ◽  
Bu Wang ◽  
Isabella Pignatelli ◽  
...  
Keyword(s):  
Dissolution Rate ◽  
Nuclear Power ◽  
Power Plants ◽  
Chemical Reactivity ◽  
Aqueous Media ◽  
Dissolution Rates ◽  
Alkaline Environments ◽  
Silicate Dissolution ◽  
Quantitative Basis ◽  
Dynamics Simulations

The dissolution rate of silicate minerals and glasses in alkaline environments is of importance in cementitious systems due to its influences on: (a) early-age reactivity that affects the rate of strength gain and microstructure formation, and/or, (b) chemical durability of aggregates; compromises in which can result deleterious processes such as alkali-silica reaction (ASR). In spite of decades of study, quantitative linkages between the atomic structure of silicates and their dissolution rate in aqueous media (i.e., chemical reactivity) has remained elusive. Recently, via pioneering applications of molecular dynamics simulations and nanoscale-resolved measurements of dissolution rates using vertical scanning interferometry, a quantitative basis has been established to link silicate dissolution rates to the topology (rigidity) of their atomic networks. Specifically, an Arrhenius-like expression is noted to capture the dependence between silicate dissolution rates and the average number of constraints placed on a central atom in a network (nc, i.e., an indicator of the network’s rigidity). This finding is demonstrated by: (i) ordering fly ashes spanning Ca-rich/poor variants in terms of their reactivity, and, (ii) assessing alterations in the reactivity of albite, and quartz following irradiation due to their potential to induce ASR in concrete exposed to radiation, e.g., in nuclear power plants.       

Mechanism of cholesterol monohydrate dissolution in taurocholate-lecithin media—Correlation between equilibrium dialysis results and dissolution rates

1984 ◽  
Vol 98 (1) ◽  
pp. 9-19
Author(s):  
W HIGUCHI ◽  
C SU ◽  
N DAABIS ◽  
A WANICHSIRIROJ ◽  
A HOFMANN
Keyword(s):  
Equilibrium Dialysis ◽  
Dissolution Rates ◽  
Cholesterol Monohydrate

Measurement of growth rates for single crystals and pressed tablets of CuSO4.5 H2O on a rotating disc

1989 ◽  
Vol 54 (11) ◽  
pp. 2951-2961 ◽  
Author(s):  
Miloslav Karel ◽  
Jaroslav Nývlt
Keyword(s):  
Growth Rate ◽  
Single Crystal ◽  
Single Crystals ◽  
Growth Rates ◽  
Diffusion Coefficients ◽  
Preferred Orientation ◽  
Rotating Disc ◽  
Dissolution Rates ◽  
Rates Of Growth ◽  
Good Agreement

Measured growth and dissolution rates of single crystals and tablets were used to calculate the overall linear rates of growth and dissolution of CuSO4.5 H2O crystals. The growth rate for the tablet is by 20% higher than that calculated for the single crystal. It has been concluded that this difference is due to a preferred orientation of crystal faces on the tablet surface. Calculated diffusion coefficients and thicknesses of the diffusion and hydrodynamic layers in the vicinity of the growing or dissolving crystal are in good agreement with published values.

The reductive dissolution of synthetic goethite and hematite in dithionite

Clay Minerals ◽  
1987 ◽  
Vol 22 (3) ◽  
pp. 329-337 ◽  
Author(s):  
J. Torrent ◽  
U. Schwertmann ◽  
V. Barron
Keyword(s):  
Specific Surface ◽  
Dissolution Rate ◽  
Surface Area ◽  
Reductive Dissolution ◽  
Natural Environments ◽  
Dissolution Rates ◽  
Aluminium Substitution ◽  
Initial Dissolution Rate

AbstractThe reductive dissolution by Na-dithionite of 28 synthetic goethites and 26 hematites having widely different crystal morphologies, specific surfaces and aluminium substitution levels has been investigated. For both minerals the initial dissolution rate per unit of surface area decreased with aluminium substitution. At similar aluminium substitution and specific surface, goethites and hematites showed similar dissolution rates. These results suggest that preferential, reductive dissolution of hematite in some natural environments, such as soils or sediments, might be due to the generally lower aluminium substitution of this mineral compared to goethite.

scholarly journals Dissolution rates of uranium compounds in simulated lung fluid

1983 ◽  
Vol 28 (1-3) ◽  
pp. 405-414 ◽  
Author(s):  
Donald R. Kalkwarf
Keyword(s):  
Dissolution Rates ◽  
Lung Fluid ◽  
Uranium Compounds ◽  
Simulated Lung Fluid

scholarly journals The effect of composition and ageing on the dissolution rates of chlorpropamide-urea solid dispersions

1977 ◽  
Vol 29 (1) ◽  
pp. 688-694 ◽  
Author(s):  
JAMES L. FORD ◽  
MICHAEL H. RUBINSTEIN
Keyword(s):  
Solid Dispersions ◽  
Dissolution Rates

scholarly journals Silicate dissolution boosts the CO2 concentrations in subduction fluids

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
S. Tumiati ◽  
C. Tiraboschi ◽  
D. A. Sverjensky ◽  
T. Pettke ◽  
S. Recchia ◽  
...  
Keyword(s):  
Co2 Concentrations ◽  
Silicate Dissolution ◽  
Subduction Fluids
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