Hyperfine interactions and structures of ferrous hydroxide and green rust II in sulfated aqueous media

1988 ◽  
Vol 41 (1) ◽  
pp. 501-504 ◽  
Author(s):  
A. A. Olowe ◽  
J. M. R. Genin ◽  
Ph. Bauer
Keyword(s):  
Hyperfine Interactions ◽  
Aqueous Media ◽  
Green Rust ◽  
Ferrous Hydroxide

scholarly journals Surface charge and growth of sulphate and carbonate green rust in aqueous media

2013 ◽  
Vol 108 ◽  
pp. 141-153 ◽  
Author(s):  
Romain Guilbaud ◽  
Maggie L. White ◽  
Simon W. Poulton
Keyword(s):  
Surface Charge ◽  
Aqueous Media ◽  
Green Rust

scholarly journals Birnessite: A New Oxidant for Green Rust Formation

Materials ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 3777
Author(s):  
Amira Doggaz ◽  
Romain Coustel ◽  
Pierrick Durand ◽  
François Humbert ◽  
Christian Ruby
Keyword(s):  
Aqueous Media ◽  
Green Rust ◽  
Oxidation Products ◽  
Partial Substitution ◽  
Mn Species ◽  
Solid Compounds ◽  
Double Hydroxide ◽  
By Products ◽  
Dissolved O2 ◽  
Iron And Manganese

Iron and manganese are ubiquitous in the natural environment. FeII-FeIII layered double hydroxide, commonly called green rust (GR), and MnIII-MnIV birnessite (Bir) are also well known to be reactive solid compounds. Therefore, studying the chemical interactions between Fe and Mn species could contribute to understanding the interactions between their respective biogeochemical cycles. Moreover, ferromanganese solid compounds are potentially interesting materials for water treatment. Here, a {Fe(OH)2, FeIIaq} mixture was oxidized by Bir in sulphated aqueous media in the presence or absence of dissolved O2. In oxic conditions for an initial FeII/OH− ratio of 0.6, a single GR phase was obtained in a first step; the oxidation kinetics being faster than without Bir. In a second step, GR was oxidised into various final products, mainly in a spinel structure. A partial substitution of Fe by Mn species was suspected in both GR and the spinel. In anoxic condition, GR was also observed but other by-products were concomitantly formed. All the oxidation products were characterized by XRD, XPS, and Mössbauer spectroscopy. Hence, oxidation of FeII species by Bir can be considered as a new chemical pathway for producing ferromanganese spinels. Furthermore, these results suggest that Bir may participate in the formation of GR minerals.

Highly efficient and selective photocatalytic CO2 to CO conversion in aqueous solution

2020 ◽  
Vol 56 (27) ◽  
pp. 3851-3854 ◽  
Author(s):  
Xiaomin Chai ◽  
Hai-Hua Huang ◽  
Huiping Liu ◽  
Zhuofeng Ke ◽  
Wen-Wen Yong ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Performance ◽  
Aqueous Media ◽  
Highly Efficient ◽  
Co Conversion

A Co-based complex displayed the highest photocatalytic performance for CO2 to CO conversion in aqueous media.

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