Dissolution rate of phosphate rock particles having a wide range of sizes

Soil Research ◽  
1994 ◽  
Vol 32 (5) ◽  
pp. 1009 ◽  
Author(s):  
JH Watkinson
Keyword(s):  
Dissolution Rate ◽  
Rate Constant ◽  
Phosphate Rock ◽  
Direct Application ◽  
Sieve Analysis ◽  
Wide Range ◽  
The Mean ◽  
Dissolution Rate Constant

An equation is proposed that describes the dissolution rate in soil of phosphate rock particles with a wide range of sizes, such as found in fertilizers for direct application. Information needed is the mean dissolution rate constant for the soil, and the dry sieve analysis of the phosphate rock.

Oxidation rate of elemental sulfur particles with a wide range of sizes

Soil Research ◽  
1993 ◽  
Vol 31 (1) ◽  
pp. 67
Author(s):  
JH Watkinson
Keyword(s):  
Rate Constant ◽  
Oxidation Rate ◽  
Total Mass ◽  
Elemental Sulfur ◽  
Sieve Analysis ◽  
Oxidation Rate Constant ◽  
Sieve Fraction ◽  
Wide Range ◽  
The Mean ◽  
Lower Size

An equation is proposed that describes the oxidation rate of elemental sulfur particles with a wide range of sizes, such as would be found in fertilizers. The only information needed is the mean oxidation rate constant over the period of interest and, from a sieve analysis, the proportions of the total mass in each sieve fraction (ratio of upper to lower size < to 2).

Corrigenda - Oxidation rate of elemental sulfur particles with a wide range of sizes

Soil Research ◽  
1993 ◽  
Vol 31 (1) ◽  
pp. 67
Author(s):  
JH Watkinson
Keyword(s):  
Rate Constant ◽  
Oxidation Rate ◽  
Total Mass ◽  
Elemental Sulfur ◽  
Sieve Analysis ◽  
Oxidation Rate Constant ◽  
Sieve Fraction ◽  
Wide Range ◽  
The Mean ◽  
Lower Size

An equation is proposed that describes the oxidation rate of elemental sulfur particles with a wide range of sizes, such as would be found in fertilizers. The only information needed is the mean oxidation rate constant over the period of interest and, from a sieve analysis, the proportions of the total mass in each sieve fraction (ratio of upper to lower size < to 2).

The Prediction of the Dissolution Rate Constant by Mixing Rules: The Study of Acetaminophen Batches

2008 ◽  
Vol 34 (5) ◽  
pp. 522-535 ◽  
Author(s):  
Tu Lee ◽  
Hung Ju Hou ◽  
Hsiang Yu Hsieh ◽  
Yan Chan Su ◽  
Yeh Wen Wang ◽  
...  
Keyword(s):  
Dissolution Rate ◽  
Rate Constant ◽  
Mixing Rules ◽  
Dissolution Rate Constant

Theory of Copper-Electrolyte Slimes Decoppering in the Presence of Hydrogen Peroxide

2019 ◽  
Vol 946 ◽  
pp. 585-590
Author(s):  
V.G. Lobanov ◽  
K.D. Naumov ◽  
A.A. Korolev
Keyword(s):  
Hydrogen Peroxide ◽  
Dissolution Rate ◽  
Rate Constant ◽  
Chemical Transformations ◽  
Composition Effect ◽  
Rotating Disc ◽  
Copper Dissolution ◽  
Copper Leaching ◽  
Copper Electrolyte ◽  
Dissolution Rate Constant

The problem of copper leaching from copper-electrolyte slimes is discussed. To intensify the long and costly process, it is proposed to use a leaching system containing sulfuric acid and hydrogen peroxide as an oxidizing agent. The chemical transformations possible variants at the treatment of slime under the specified conditions and the thermodynamic parameters of the predicted reactions are considered. Solution composition effect on the copper dissolution rate at room temperature was studied in the presence of hydrogen peroxide using the rotating disc technique. It is found that dissolution rate constant at using hydrogen peroxide slightly inferior to dissolution rate constant under autoclaved conditions in an oxygen atmosphere.

Mechanisms and Kinetics of Silica-Rich Binary Na2O-SiO2 Glass Corrosion in 100°C Water at pH=7

2007 ◽  
Vol 336-338 ◽  
pp. 1823-1826 ◽  
Author(s):  
K.G. Nickel ◽  
S. Merkel
Keyword(s):  
Dissolution Rate ◽  
Rate Constant ◽  
Edge Length ◽  
Sio2 Content ◽  
Shrinking Core Model ◽  
Water Interaction ◽  
Glass Corrosion ◽  
Shrinking Core ◽  
Dissolution Rate Constant ◽  
Kinetics Of

Sodium-rich glasses of the system Na2O-SiO2 are well known to be easily soluble in water. This is not true for silica-rich compositions. We have manufactured quenched glasses with silica contents between 65 and 80 wt.% SiO2 and followed the water interaction at 100°C by measuring mass and sample dimensions in intervals. Comparing the path of edge length, mass and volume to a general shrinking core model for cuboids we conclude that only compositions between 65 and 70 wt% SiO2 can be described well by a simple dissolution process. The logarithm of the dissolution rate constant varies linearly with the SiO2 content. At higher silica contents the mechanism changes towards leaching of sodium. We propose changing glass structures to be responsible for the change in mechanism.

Ultrasonic-Assisted Dissolution of Polystyrene in Decahydronaphthalene for the Preparation of Poly(Cyclohexylethylene)

2014 ◽  
Vol 651-653 ◽  
pp. 157-160
Author(s):  
Jia Jia Wang ◽  
Hui Huang ◽  
Ting Li ◽  
Shi Ying Tao
Keyword(s):  
Kinetic Model ◽  
Dissolution Rate ◽  
Rate Constant ◽  
Dissolution Kinetic ◽  
Dissolution Process ◽  
Dissolution Time ◽  
Mechanical Agitation ◽  
Ultrasonic Assisted ◽  
Dissolution Rate Constant ◽  
Dissolution Ratio

Dissolution process of polystyrene in decahydronaphthalene solution was conducted and compared under different conditions. The effects of dissolution time and temperature on the dissolution ratio of polystyrene were performed with the assistance of ultrasonic and mechanical agitation, respectively. The dissolution ratio of polystyrene increased with the increment of dissolution time and dissolution temperature, polystyrene dissolved faster under ultrasonic-assisted process. The polystyrene dissolution kinetic model was developed and used to calculate the dissolution rate constant. The kinetic model showed good agreement with the experimental data, and the dissolution rate constant indicated that ultrasonic can obviously enhance the dissolution process of polystyrene in decahydronaphthalene solution.

Effect of Fly Ash as an Additive on the Limestone Dissolution Rate Constant

2015 ◽  
Vol 29 (5) ◽  
pp. 3284-3291 ◽  
Author(s):  
Lawrence Koech ◽  
Hilary Rutto ◽  
Hein Neomagus ◽  
Ray Everson ◽  
Letsabisa Lerotholi
Keyword(s):  
Fly Ash ◽  
Dissolution Rate ◽  
Rate Constant ◽  
Limestone Dissolution ◽  
Dissolution Rate Constant
Sign in / Sign up

Export Citation Format

Share Document