... scattering (MS) contributes significant spectral amplitude, especially MS associated with the uranyl moiety and carbonate and phosphate ligands. The signal from MS associated with bidentate carbonate is strong and ubiquitous, even in aqueous \batchmode \documentclass[fleqn,10pt,legalpaper]{article...

... mechanism involves ligand exchange with surface-adsorbed and structural SO 4 . The results of the sorption experiments also suggested monodentate As(V) coordination at the surface-adsorbed SO 4 sites [(Fe 1 ) 2 SO 4 ] and bidentate As(V) coordination at the structural SO 4 sites [(Fe 3 ) 2 SO 4...

... of the mineral layer which implies steric hindrance for four H 2 O ligands. For the adsorption complexes of Np(V), initial structures with both CN = 4 and 5 were constructed. For the complexes adsorbed in monodentate fashion on AlOH and Si u O, and in bidentate fashion on AlO–SiOH sites, the initially five...

...)-modified smectites with an important group of organic molecules containing the benzimidazole group. It was of particular interest to study the reactivity of Cu(II)-montmorillonite in basic media, where benzimidazole may act as a bridging bidentate ligand. Such ligands may form coordination polymers...

... on the octahedral vacancy, Cd(II) was coordinated with two water ligands and thus it presented a distorted octahedral geometry ( Figure 2c ). On the ≡SiO site, the length of the Cd(II)–O bond was 2.13 Å ( Figure 2a ), which was a little shorter than those bonds in the bidentate and tetradentate sites. This was due...

...Figure 5. a) Ligand distribution of two divalent anions between surface and solution for surface complexes. The bidentate IS complex of SeO 3 2− shares two ligands with the surface while SeO 4 2− (which may form a monodentate IS or an OS complex) shares one or no ligand with the surface...

..., or synthesized by humans, provides ligands that coordinate heavy metal (HM) ions through surface complexation reactions. The interactions between sites on organic surfaces and metal ions in aqueous systems influence numerous processes including contaminant transport and transformation, nutrient availability...

...Jillian L. Campbell; Matthew J. Eick Abstract Organic ligands, such as EDTA, accelerate the dissolution of silicate and oxide minerals. In natural systems, oxyanions can compete with organic ligands for mineral surface sites thereby affecting ligand-promoted dissolution rates, either enhancing...

... ligands. At low Zn loading, a binuclear bidentate complex is formed (species A in the upper panel of Fig. 19 ) with the number of metal ions in the second shell of Zn denoted as N = 2 in Figure 19a . The spectroscopic data ( Waychunas et al. 2002 ) given as squares are quantitatively in agreement...

... or six ligands that are arranged at the equatorial vertices of square, pentagonal, or hexagonal bipyramids ( Fig. 1 ). These ligands correspond to O, OH, H 2 O, and a variety of oxyanions such as silicate, sulphate, phosphate, and carbonate. Uranyl polyhedra are usually linked into structural units...

..., including Pb 2+ adsorbed to goethite (AdPb). Also shown is the bidentate-mononuclear attachment geometry of a Pb(O,OH) 4 surface complex to an Fe(O,OH) 6 octahedron. (right panel) False-coloured backscattered electron image of a microprobe section of the Hamms tailings material, showing the presence...

..., that the subsequent developments are closely related. This concerns the analogy between dissolved ligands that can complex, for example, metal ions and surface ligands (e.g., surface hydroxyls on oxidic surfaces) that may form surface complexes with dissolved metal ions in an adsorption reaction. In the mostly...

..., that the subsequent developments are closely related. This concerns the analogy between dissolved ligands that can complex, for example, metal ions and surface ligands (e.g., surface hydroxyls on oxidic surfaces) that may form surface complexes with dissolved metal ions in an adsorption reaction. In the mostly...

... complex with a monodentate ligand; and (3) a surface complex with a bidentate binuclear ligand on aluminum octahedral layers. A model where sulfate is forming an outer-sphere location yields the best fit ( Table 1 ) and a 75% confidence in the F-test (see all parameters used for the F-tests...

... and Al 14 O 22 clusters with the reactive surface Al site coordinated by three oxygens were used as model substrates for corundum and boehmite surfaces. Among the models considered, calculated IR frequencies based on a bidentate side-on structure with a 5-membered ring agree best with the observed...

.... Such measurements have yielded a wealth of information on the structure, stoichiometry, attachment geometry (inner vs. outer-sphere, monodentate vs. bidentate or tridentate), the presence of multinuclear complexes, and the presence of ternary surface complexes when complexing ligands are present in solution...