Adsorption Mechanism of Gallium(III) and Indium(III) onto γ-Al2O3

Surface complexation of neodymium at the rutile-water interface: A potentiometric and modeling study in NaCl media to 250°C

“…Trivalent cation hydrolysis is also consistent with some pressure-jump kinetic data (Lin et al, 1997). Hiemstra and van Riemsdijk (2002) propose that adsorbed cations are either more or less prone to hydrolysis depending on the degree of distortion of their coordination environment relative to homogeneous solutions.…”

“…Previous investigations have noted that the adsorption constants of metal cations are linearly correlated with the corresponding aqueous hydrolysis constants at room temperature (e.g., Dzombak and Morel, 1990;Kosmulski, 1997b;Lin et al, 1997). The recent experimental studies of aqueous Nd 3ϩ hydrolysis conducted by Klungness and Byrne (2000) (27) which is of the same form as the corresponding solution first hydrolysis constant.…”

Surface speciation of yttrium and neodymium sorbed on rutile: Interpretations using the charge distribution model

“…The hydrolysis of trivalent species occurs readily in aqueous solutions at high pH (pH > 7, Wood, 1990b;Klungness and Byrne, 2000;Wood et al, 2002). In addition, the hydrolysis of adsorbed trivalent cations is frequently considered in surface complexation models (James and Healy, 1972;Dzombak and Morel, 1990;Stumm, 1992;Hiemstra and van Riemsdijk, 2007), and some pressure-jump kinetic data suggest hydrolysis of trivalent cations (Lin et al, 1997).…”

Modeling Pb(II) adsorption onto sandy loam soil

“…At low metal concentrations, metal adsorption onto hydrous solids is mainly a surface coordination process, which can be modeled thermodynamically as a complexation reaction between surface sites and adsorbates [1]. In the past decades, surface complex formation models (SCFM) have been shown to be capable of describing metal ion adsorption onto solid surfaces, such as oxides, activated carbon, soils, concrete, sludge, and sediments [2][3][4][5][6][7][8][9][10][11][12][13]. While the adsorption of metals onto soil has been extensively studied, investigation of adsorption mechanisms in response to variety of binding energies has received little attention.…”