Laurate-Ion Activity in Solutions of Potassium Laurate in the Absence and Presence of Neutral Salts

1948 ◽  
Vol 52 (1) ◽  
pp. 22-27 ◽  
Author(s):  
I. M Kolthoff ◽  
Warren F. Johnson
Keyword(s):  
Potassium Laurate ◽  
Ion Activity

Determination of Aluminum Ion Activity in Soil Extracts

1959 ◽  
Vol 23 (4) ◽  
pp. 266-269 ◽  
Author(s):  
W. L. Lindsay ◽  
Michael Peech ◽  
J. S. Clark
Keyword(s):  
Soil Extracts ◽  
Aluminum Ion ◽  
Ion Activity

scholarly journals Comprehensive Analytical Modelling of an Absolute pH Sensor

Sensors ◽  
2021 ◽  
Vol 21 (15) ◽  
pp. 5190
Author(s):  
Cristina Medina-Bailon ◽  
Naveen Kumar ◽  
Rakshita Pritam Singh Dhar ◽  
Ilina Todorova ◽  
Damien Lenoble ◽  
...  
Keyword(s):  
Silicon Dioxide ◽  
Numerical Experiments ◽  
Ph Sensor ◽  
Hafnium Dioxide ◽  
Matlab Code ◽  
Oxide Degradation ◽  
Depletion Width ◽  
Ion Activity ◽  
The Absolute ◽  
The Impact

In this work, we present a comprehensive analytical model and results for an absolute pH sensor. Our work aims to address critical scientific issues such as: (1) the impact of the oxide degradation (sensing interface deterioration) on the sensor’s performance and (2) how to achieve a measurement of the absolute ion activity. The methods described here are based on analytical equations which we have derived and implemented in MATLAB code to execute the numerical experiments. The main results of our work show that the depletion width of the sensors is strongly influenced by the pH and the variations of the same depletion width as a function of the pH is significantly smaller for hafnium dioxide in comparison to silicon dioxide. We propose a method to determine the absolute pH using a dual capacitance system, which can be mapped to unequivocally determine the acidity. We compare the impact of degradation in two materials: SiO2 and HfO2, and we illustrate the acidity determination with the functioning of a dual device with SiO2.

Simplified estimates of ion-activity products of calcium oxalate and calcium phosphate in mouse urine

2011 ◽  
Vol 40 (4) ◽  
pp. 285-291 ◽  
Author(s):  
Hans-Göran Tiselius ◽  
Renato Ribeiro Nogueira Ferraz ◽  
Ita Pfeferman Heilberg
Keyword(s):  
Calcium Phosphate ◽  
Calcium Oxalate ◽  
Mouse Urine ◽  
Ion Activity ◽  
Ion Activity Products

Studies With The SelectrodeTm: Determination Of Citrate Ion Activity

1980 ◽  
Vol 13 (6) ◽  
pp. 409-418 ◽  
Author(s):  
L. P. Dorsett ◽  
D. E. Mulcahy
Keyword(s):  
Ion Activity

Phase Rule Equilibria of Acid Soaps. I. Anhydrous Acid Potassium Laurate.

1933 ◽  
Vol 37 (6) ◽  
pp. 675-684 ◽  
Author(s):  
James W. Mcbain ◽  
Malcolm C. Field
Keyword(s):  
Phase Rule ◽  
Potassium Laurate

scholarly journals Computer-Simulated Evaluation of Possible Mechanisms for Quenching Heavy Metal Ion Activity in Plant Vacuoles

1991 ◽  
Vol 97 (3) ◽  
pp. 1154-1160 ◽  
Author(s):  
Jian Wang ◽  
Bill P. Evangelou ◽  
Mark T. Nielsen ◽  
George J. Wagner
Keyword(s):  
Heavy Metal ◽  
Metal Ion ◽  
Heavy Metal Ion ◽  
Ion Activity ◽  
Plant Vacuoles

Speciation and Geochemical Implications of Carcass Burial Leachate

2018 ◽  
Vol 61 (2) ◽  
pp. 559-570
Author(s):  
Dyan L. Pratt ◽  
Terrance A. Fonstad
Keyword(s):  
Chemical Composition ◽  
Ionic Strength ◽  
Activity Coefficient ◽  
Swine Manure ◽  
Burial Site ◽  
Mass Mortality Event ◽  
Ammonium N ◽  
Ion Activity ◽  
Common Activity ◽  
The Impact

Abstract. In the event of a mass livestock mortality situation, disposal routes such as burial are commonly chosen. The impact of burial on the environment could be substantial, but the composition of the leachate arising from a burial site has not been well documented. This study was performed to determine the chemical composition of leachate arising from animal mortalities in a burial setting. Three species of livestock were used: bovine, swine, and poultry. Leachate collected from lined burial pits over two years of decomposition was analyzed for major and minor ions. Analysis indicated that livestock mortality leachate contains, on average, concentrations of 46,000 mg L-1 of alkalinity (as bicarbonate), 12,600 mg L-1 of ammonium-N, 2600 mg L-1 of chloride, 3600 mg L-1 of sulfate, 2300 mg L-1 of potassium, 1800 mg L-1 of sodium, and 1500 mg L-1 of phosphorus, along with lesser amounts of iron, calcium, and magnesium. Select samples had maximum concentrations of ammonium-N and bicarbonate up to 50% higher than these average values. In comparison to earthen swine manure storages and landfills, the ionic strength of the leachate was 2 to 4 times higher, and therefore its impact on water resources could be greater. Following the study of the chemical composition of livestock mortality leachate, the potential impacts of this leachate on the soil/water systems below a burial site were investigated. The ionic strength of the leachate presents its own set of challenges. Basic modeling of ion activity using the five most common activity coefficient equations (Debye-Hückel, extended Debye-Hückel, Truesdell-Jones, Davies, and Pitzer) were considered to assess the sensitivity of these methods for calculated ion activity as impacted by the ionic strength of the leachate. This was completed to further enhance the modeling and speciation efforts. Based on the results and the applicability of the Truesdell-Jones equation, PHREEQC was used to assess the chemical speciation of the leachate. The speciation of this leachate provides evidence of phosphate and sulfate compounds available for potential unattenuated transport. Understanding the geochemical implications of livestock mortality burial will give scientists and regulators more information for performing future risk analyses when considering mortality burial as a management option, either routinely or during a mass mortality event. Keywords: Ion activity coefficient, Ionic strength, Leachate chemical composition, Livestock burial leachate, Speciation.

Three‐Sodium Ion Activity of a Hollow Spherical Na 3 V 2 (PO 4 ) 2 F 3 Cathode: Demonstrating High Capacity and Stability

2019 ◽  
Vol 3 (1) ◽  
pp. 52-55 ◽  
Author(s):  
Ayan Mukherjee ◽  
Tali Sharabani ◽  
Ilana Perelshtein ◽  
Malachi Noked
Keyword(s):  
High Capacity ◽  
Sodium Ion ◽  
Ion Activity
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