Shifts in Iron and Manganese Oxidation States, Bonding Environments, and Mobility in Mining-Impacted Lake Sediments Exposed to Anoxic and Anoxic + Algal Detritus Experimental Conditions

2021 ◽  
Author(s):  
Jeff Langman ◽  
Gaige Swanson ◽  
James Moberly
Keyword(s):  
Lake Sediments ◽  
Oxidation States ◽  
Manganese Oxidation ◽  
Experimental Conditions ◽  
Iron And Manganese

scholarly journals Manganese oxidation states repartition in a channel-like mesoporous zirconium oxide

2020 ◽  
Vol 27 (6) ◽  
pp. 1823-1835
Author(s):  
Nelly Couzon ◽  
Laurence Bois ◽  
Clémentine Fellah ◽  
Cristian Loestean ◽  
Fernand Chassagneux ◽  
...  
Keyword(s):  
Zirconium Oxide ◽  
Oxidation States ◽  
Manganese Oxidation

Accessibility of manganese oxidation states. Control by pentaaza macrocyclic ligands

1977 ◽  
Vol 16 (3) ◽  
pp. 540-544 ◽  
Author(s):  
James C. Dabrowiak ◽  
Laurence A. Nafie ◽  
Philip S. Bryan ◽  
Andrew T. Torkelson
Keyword(s):  
Macrocyclic Ligands ◽  
Oxidation States ◽  
Manganese Oxidation

scholarly journals Correction to: Manganese oxidation states repartition in a channel-like mesoporous zirconium oxide

2021 ◽  
Vol 28 (1) ◽  
pp. 311-311
Author(s):  
Nelly Couzon ◽  
Laurence Bois ◽  
Clémentine Fellah ◽  
Cristian Leostean ◽  
Fernand Chassagneux ◽  
...  
Keyword(s):  
Zirconium Oxide ◽  
Oxidation States ◽  
Manganese Oxidation

scholarly journals Properties of catalyst for iron and manganese oxidation in filter materials

2018 ◽  
Vol 59 ◽  
pp. 00014 ◽  
Author(s):  
Joanna Jeż-Walkowiak ◽  
Malgorzata Komorowska-Kaufman ◽  
Zbysław Dymaczewski ◽  
Marek M. Sozański ◽  
Przemysław Zakrzewski
Keyword(s):  
Chemical Composition ◽  
Silica Sand ◽  
Natural Material ◽  
Filter Media ◽  
Manganese Oxidation ◽  
Manganese Removal ◽  
Filter Materials ◽  
Microstructure Parameters ◽  
Filtration Material ◽  
Iron And Manganese

The aim of this work is to determine the properties of contact layers of grain of different type of filter media in term of their suitability for catalytical manganese oxidation and auto-activation for manganese removal from groundwater. The following oxidative filtration materials were investigated: auto-activated silica sand taken from full-scale filters (oxide coated filter media), Pyrolox – manganese ore – natural material and Hydrolit – artificially activated material. As a reference two natural not chemically active materials were tested: clean silica sand and clean chalcedonite. The investigation resulted in chemical composition and microstructure parameters of catalyst contact layers of grains. The modern analytical methods were used: EDAX, Raman spectroscopy, mercury and helium porozymetry. The data indicated that catalyst from autoacivated filtration material has better chemical composition and porosity parameters in comparison to tested catalytic filtration materials, making it more suitable for adsorption and catalytic manganese oxidation.

Iodimetric determinations in organic solvents: Determination of manganese oxidation states in methylene chloride solutions

1990 ◽  
Vol 68 (1) ◽  
pp. 79-81 ◽  
Author(s):  
Joaquin F. Perez-Benito ◽  
Enrique Brillas ◽  
Conchita Arias
Keyword(s):  
Acetic Acid ◽  
Quaternary Ammonium ◽  
Glacial Acetic Acid ◽  
Methylene Chloride ◽  
Oxidation States ◽  
Manganese Oxidation ◽  
Chloride Solutions ◽  
Tetrabutylammonium Iodide ◽  
Organic Solutions

An iodimetric technique has been developed to quantitatively analyze the oxidants present in organic solutions. Addition of excess tetrabutylammonium iodide and excess glacial acetic acid results in the formation of tetrabutylammonium triiodide, whose concentration can be measured spectrophotometrically at 295 or 365 nm. Application of this technique to the determination of the final oxidation state of manganese in permanganate reactions in methylene chloride solutions is described. The equilibrium constant for formation of tetrabutylammonium triiodide in methylene chloride has been measured: K = (3.48 ± 0.12) × 104 at 25.0 °C. Keywords: iodimetric determinations, manganese oxidation states, methylene chloride, quaternary ammonium permanganate, quaternary ammonium triiodide.

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