Applying the Nernst Equation To Simulate Redox Potential Variations for Biological Nitrification and Denitrification Processes

2004 ◽  
Vol 38 (6) ◽  
pp. 1807-1812 ◽  
Author(s):  
Cheng-Nan Chang ◽  
Hong-Bang Cheng ◽  
Allen C. Chao
Keyword(s):  
Redox Potential ◽  
Nernst Equation ◽  
Nitrification And Denitrification ◽  
Biological Nitrification

Radiation-Induced Electrolytic Corrosion of LWRS: (Part 2) — Verification of In- and Out-Core Redox Potential Differences

2016 ◽  
Author(s):  
Genn Saji
Keyword(s):  
Dielectric Property ◽  
Redox Potential ◽  
Single Point ◽  
Ionic Species ◽  
Nernst Equation ◽  
Radiation Chemical ◽  
Potential Shift ◽  
Reactor Water ◽  
Electrolytic Corrosion ◽  
Radiation Induced

The author recently identified that there should exist a “differential radiation cell” mechanism in the reactor water, prompting “radiation-induced electrolytic (RIE)” phenomena. This mechanism was identified while trying to theoretically reconstruct the potential differences observed in two in-pile test loops; NRI-Rez in Czech Republic and INCA Loop in Sweden. Part 2 of this series focuses on the theoretical reconstruction of the observed potential differences. Assuming a state of equilibrium, the author tried to develop a formalism by extending the Nernst equation to reproduce the observed redox potential differences. The radiological potential shift term is separated from the Nernst equation where the latter deals only with stable molecular and ionic species. The radiological effect is described as a perturbation term to the Nernst equation representing a potential shift due to radiation-chemical reactions which should diminish to zero without radiation. The theory generally reproduced the experimental results after fitting the theoretical curve at a single point of the potential for both PWR and BWR-NWC water chemistry environments. This discrepancy is likely due to the “conductive-dielectric property” of the reactor water.

scholarly journals Effect of Salt Concentration, Solvent Donor Number and Coordination Structure on the Variation of the Li/Li+ Potential in Aprotic Electrolytes

Energies ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1470 ◽  
Author(s):  
P. K. R. Kottam ◽  
S. Dongmo ◽  
M. Wohlfahrt-Mehrens ◽  
M. Marinaro
Keyword(s):  
Redox Potential ◽  
High Voltage ◽  
Salt Concentration ◽  
Lithium Batteries ◽  
Reference Electrode ◽  
Donor Number ◽  
Nernst Equation ◽  
Effect Of Solvent ◽  
Potential Applications ◽  
Cation Complex

The use of concentrated aprotic electrolytes in lithium batteries provides numerous potential applications, including the use of high-voltage cathodes and Li-metal anodes. In this paper, we aim at understanding the effect of salt concentration on the variation of the Li/Li+ Quasi-Reference Electrode (QRE) potential in Tetraglyme (TG)-based electrolytes. Comparing the obtained results to those achieved using Dimethyl sulfoxide DMSO-based electrolytes, we are now able to take a step forward and understand how the effect of solvent coordination and its donor number (DN) is attributed to the Li-QRE potential shift. Using a revised Nernst equation, the alteration of the Li redox potential with salt concentration was determined accurately. It is found that, in TG, the Li-QRE shift follows a different trend than in DMSO owing to the lower DN and expected shorter lifespan of the solvated cation complex.

Fluid bed biological nitrification and denitrification in high salinity wastewater

1997 ◽  
Vol 36 (1) ◽  
pp. 93-100 ◽  
Author(s):  
Leo H. J. Vredenbregt ◽  
Karsten Nielsen ◽  
Andrea A. Potma ◽  
Gert Holm Kristensen ◽  
Christina Sund
Keyword(s):  
Power Plants ◽  
Catalytic Reduction ◽  
Research Work ◽  
Chloride Concentration ◽  
Biological Processes ◽  
Fluid Bed ◽  
Attractive Option ◽  
Nitrification And Denitrification ◽  
Biological Nitrification ◽  
Nitrate And Nitrite

Wastewater from wet lime(stone)-gypsum flue gas desulphurisation (FGD) processes in coal-fired power plants contains nitrate. Where case selective catalytic reduction (SCR) of NOx is applied the wastewater can also contain ammonia. For the removal of both nitrate and ammonia, biological processes are an attractive option. A bottle-neck for application of biological processes might be the high chloride concentration and relatively high temperature of the wastewater. Therefore research work was performed in fluid-bed reactors at pilot-plant scale for both biological nitrification and denitrification. Biological nitrification was studied up to 34 gCl−/l and nitrite was the main product formed. Biological denitrification was effective up to at least 45 gCl−/l. Both nitrate and nitrite were removed effectively.

Biological Nitrification and Denitrification Processes

2009 ◽  
pp. 539-588 ◽  
Author(s):  
Yue-Mei Lin ◽  
Joo-Hwa Tay ◽  
Yu Liu ◽  
Yung-Tse Hung
Keyword(s):  
Nitrification And Denitrification ◽  
Biological Nitrification
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