The transformation of ferrihydrite in the presence of trace Fe(II): The effect of the ammonia, amine and the coordination ions of Fe(III)

Journal Article · Mon Mar 15 00:00:00 EDT 2010 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2009.12.020· OSTI ID:21372517

Lijuan, Yang; Miaorui, Ma ^[1]; Ping, Li ^[1]

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1. School of Chemistry and Material Science, Hebei Normal University, Shijiazhuang 050016 (China)

This work examined Fe(II)-induced transformation of ferrihydrite in the presence of ammonia, amine and the coordination ions of Fe(III). Our earlier results showed that ferrihydrite transformed into the mixture of lepidocrocite, goethite and/or hematite in the presence of trace Fe(II) and absence of ammonia and similar species. However, the formation of lepidocrocite was restrained when using ammonia as precipitants. When introducing some amines (e.g. ethanolamine and diethanolamine) and some coordination ions (e.g. F{sup -} and C{sub 2}O{sub 4}{sup 2-} ions) into the reaction system, a similar effect on the transformation of ferrihydrite was found. Probably, the complexes formed between Fe(III) and those additives favor the formation of goethite. At the same time, the introduction of these additives hinders Fe(II) from interacting with ferrihydrite, which makes the catalytic dissolution of ferrihydrite be limited, thus, the formation of lepidocrocite be restrained. - Graphical Abstract: Fe(II)-induced transformation of ferrihydrite in the presence of ammonia, amine and coordination ions of Fe(III) was studied. The introduction of the additives favors the formation of goethite.

• OSTI ID: 21372517
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 3 Vol. 183; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
AMINES
AMMONIA
CARBOXYLIC ACID SALTS
CHARGED PARTICLES
COMPLEXES
DISSOLUTION
FLUORINE IONS
GOETHITE
HEMATITE
HYDRIDES
HYDROGEN COMPOUNDS
IONS
IRON COMPLEXES
IRON ORES
MINERALS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
ORES
ORGANIC COMPOUNDS
OXALATES
OXIDE MINERALS
TRANSITION ELEMENT COMPLEXES