Isoelectric points of fresh and aged Fe(OH)2

•IEP of Fe(OH)2 reported for the first time.•Electrokinetic properties of Fe(II) precipitates are similar for different preparations.•Electrokinetic properties of Fe(II) precipitates are rather insensitive to aging under anaerobic conditions. Gray-green precipitates obtained from FeCl2 solutions in...

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Published inColloids and surfaces. A, Physicochemical and engineering aspects Vol. 441; pp. 326 - 330
Main Authors Mączka, Edward, Jartych, Elżbieta, Kosmulski, Marek
Format Journal Article
LanguageEnglish
Published Elsevier B.V 20.01.2014
Subjects
Anaerobic conditions
Diffraction
Iron
Iron (II) hydroxide
Isoelectric point
Mossbauer spectroscopy
Point of zero charge
Precipitates
Precipitation
X-rays
Isoelectric point
Point of zero charge
Iron (II) hydroxide
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Summary:•IEP of Fe(OH)2 reported for the first time.•Electrokinetic properties of Fe(II) precipitates are similar for different preparations.•Electrokinetic properties of Fe(II) precipitates are rather insensitive to aging under anaerobic conditions. Gray-green precipitates obtained from FeCl2 solutions in basic medium in anaerobic conditions were studied in wet state. The results obtained by X-ray diffraction and Mossbauer spectroscopy suggest that Fe(OH)2 is their main component. It is accompanied by wüstite, goethite, and Fe(OH)3. The isoelectric point (IEP) of such precipitates falls at pH 10, which is a higher value than the IEP of iron (III) (hydr)oxides reported in the literature. Aging (for several days) had rather insignificant effect on the IEP.
Bibliography:ObjectType-Article-2
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content type line 23
ISSN:0927-7757
1873-4359
DOI:10.1016/j.colsurfa.2013.09.022