scholarly journals Phytoremediation of cyanide and iron cyanide complexes and the mechanisms involved

2019 ◽  
Vol 3 (1) ◽  
Keyword(s):  
Iron Cyanide ◽  
Cyanide Complexes

scholarly journals Long-Term Release of Iron-Cyanide Complexes from the Soils of a Manufactured Gas Plant Site

2013 ◽  
Vol 04 (11) ◽  
pp. 8-19 ◽  
Author(s):  
Magdalena Sut ◽  
Thomas Fischer ◽  
Frank Repmann ◽  
Thomas Raab
Keyword(s):  
Iron Cyanide ◽  
Manufactured Gas Plant ◽  
Plant Site ◽  
Cyanide Complexes

scholarly journals Mobility of Iron-Cyanide Complexes in a Humic Topsoil under Varying Redox Conditions

2009 ◽  
Vol 2009 ◽  
pp. 1-6
Author(s):  
Thilo Rennert ◽  
Tim Mansfeldt
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Redox Potential ◽  
Opposite Direction ◽  
Redox Conditions ◽  
Reductive Dissolution ◽  
Redox Processes ◽  
Iron Cyanide ◽  
Cyanide Complexes ◽  
Mn Oxides

The potentially toxic Fe-CN complexes ferricyanide,[FeIII(CN)6]3−, and ferrocyanide,[FeII(CN)6]4−, undergo a variety of redox processes in soil, which affect their mobility. We carried out microcosm experiments with suspensions of a humic topsoil (pH 5.3;Corg107 gkg-1) to which we added ferricyanide (20 mgl-1). We varied the redox potential (EH) from −280 to 580 mV by usingO2,N2and glucose. The decrease ofEHled to decreasing concentrations of Fe-CN complexes and partial reductive dissolution of (hydrous) Fe and Mn oxides. The dynamics of aqueous Fe-CN concentrations was characterized by decreasing concentrations when the pH rose and theEHdropped. We attribute these dependencies to adsorption on organic surfaces, for which such a pH/EHbehavior has been shown previously. Adsorption was reversible, because when the pH andEHchanged into the opposite direction, desorption occurred. This study demonstrates the possible impact of soil organic matter on the fate of Fe-CN complexes in soil.

Adsorption of iron cyanide complexes onto clay minerals, manganese oxide, and soil

2010 ◽  
Vol 45 (11) ◽  
pp. 1391-1396 ◽  
Author(s):  
Dong-Hee Kang ◽  
A. Paul Schwab ◽  
C. T. Johnston ◽  
M. Katherine Banks
Keyword(s):  
Manganese Oxide ◽  
Clay Minerals ◽  
Iron Cyanide ◽  
Cyanide Complexes

X-RAY ABSORPTION EVIDENCE FOR THE BACK-DONATION IN IRON CYANIDE COMPLEXES

2002 ◽  
Vol 09 (01) ◽  
pp. 359-364 ◽  
Author(s):  
A. S. VINOGRADOV ◽  
A. B. PREOBRAJENSKI ◽  
S. A. KRASNIKOV ◽  
T. CHASSÉ ◽  
R. SZARGAN ◽  
...  
Keyword(s):  
Charge Transfer ◽  
High Resolution ◽  
Absorption Spectra ◽  
Spectral Characteristics ◽  
X Ray ◽  
Iron Cyanide ◽  
Cyanide Complexes ◽  
Cyanide Ligands ◽  
X Ray Absorption ◽  
Back Donation

High-resolution, uniformly calibrated Fe 2p 3/2 absorption spectra of various Fe(II) and Fe(III) compounds with the metal atom octahedrally coordinated to atomic and molecular ligands are analyzed expecting changes in the absorption spectra due to differences in the formal valence state and in the character of the chemical bond. Particular attention is given to revealing spectral characteristics of the 3d π–2π(π*) charge transfer (π-back-donation effect) between the iron atom and cyanide ligands.

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