Influence of Anionic Layer Structure of Fe-Oxyhydroxides on the Structure of Cd Surface Complexes

Adsorption and surface oxidation of Fe(II) on metal (hydr)oxides

“…Atomic force measurements showed a relative contribution of the 0 1 0 face of about 70% (Manceau et al, 2000) for plate-like particles.…”

“…Lepidocrocite (Fig. 5) may have a rod or a plate-like morphology (Lewis and Farmer, 1986;Manceau et al, 2000) or a combination in which the elongated plates finger out in rods in the crystallographic c-direction (Weidler, 1996). Main mineral faces are supposed to be the 0 1 0 and 100 faces.…”

“…Main mineral faces are supposed to be the 0 1 0 and 100 faces. Manceau et al (2000) showed that 1 0 1 faces may develop too. These crystal faces can be formed at the c-axis termination of elongated crystals as sketched in Fig.…”

“…As for boehmite, the surface groups at the 0 1 0 face of lepidocrocite are all doubly coordinated ("Fe 2 OH) if the 0 1 0 face is perfectly crystallized. The 100 face consists of three rows of singly ("FeOH) and one row of triply ("Fe 3 O) coordinated surface groups (Manceau et al, 2000). At the 1 0 1 face and its equivalents, a combination of singly and doubly coordinated surface groups is found in a 1:1 ratio (Table 4).…”

Nanoparticulate Iron Oxide Minerals in Soils and Sediments: Unique Properties and Contaminant Scavenging Mechanisms

“…Hence we expect that comparing sorption on ferrihydrite to sorption on hematite and goethite (with crystallites more commonly in the micron size range and larger) might demonstrate the effects of reduced scale. For example, Cd(II) substitutes in the goethite structure and also forms inner-sphere complexes sharing edges with FeO 6 polyhedra (Spadini et al, 1994;Manceau et al, 2000). However in HFO, there appears only to be edge-sharing inner-sphere complexation.…”