George A. Parks

TL;DR: In this article, in situ extended x-ray absorption fine structure (EXAFS) measurements of adsorbed selenate and selenite ions at the α-FeOOH(goethite)-water interface have been performed; these measurements show that selenates forms a weakly bonded, outer-sphere complex and that Selenite forms a strongly bonded, inner-spheres complex.

TL;DR: X-ray absorption fine structure spectroscopy (XAFS) was used to determine arsenic (As) oxidation state, local coordination (to a radius of nearly equal Aa around As), and the relative proportion of different As species in model compounds and three California mine wastes as discussed by the authors.

TL;DR: In this paper, the development of surface charge and potential, the zeta potential of the solid, the conductivity of the sol, electrolyte adsorption densities, and related properties are modeled.

TL;DR: In this article, the diagenetic sequence of silica is examined in terms of several thermodynamic and kinetic concepts, and the relationship between solubility and surface area or particle size is explained.

TL;DR: In this article, the parabolic exchange kinetics of surface magnesium ions with hydrogen ions were investigated and it was shown that the amount of silicon and magnesium dissolved is proportional to t and congruent.