title: Extent and mechanism of metal ion incorporation into precipitated ferrites.
abstract: The ability of many noniron metals to be incorporated into the structure of ferrites is being utilized in numerous industrial and environmental applications. The incorporation of some of these metals during Fe(II) oxidation-induced precipitation at moderate temperatures (80-100°C) appears to be limited, for reasons not fully understood, and to extents not always agreed (e.g., Ni(2+), Cr(3+)). In this paper, the incorporation maxima of six metals into the structure of precipitated ferrites (in terms of x in Me(x)Fe(3-)(x)O(4), Me represents a noniron metal) were concluded to be 1.0, 1.0, 0.78, 0.49, 0.35, and 0.0 for Zn(2+), Co(2+), Ni(2+), Al(3+), Cd(2+) and Cr(3+), respectively. With the exception of the much larger Cd(2+), these values were associated with kinetic considerations controlled by the H(2)O exchange rate between the hydration shells surrounding the dissolved metal ion.
authors.affiliation: Faculty of Civil and Environmental Engineering, Technion, Haifa, Israel. sivan.klas@gmail.com
authors.forename: Sivan
authors.initials: S
authors.lastname: Klas
authors.forename: Yael
authors.initials: Y
authors.lastname: Dubowski
authors.forename: Gumelar
authors.initials: G
authors.lastname: Pritosiwi
authors.forename: Joachim
authors.initials: J
authors.lastname: Gerth
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Calmano
authors.forename: Ori
authors.initials: O
authors.lastname: Lahav