Energetics of arsenate sorption on amorphous aluminum hydroxides studied using flow adsorption calorimetry

Application of Isothermal Calorimetry to Phosphorus Sorption onto Soils in a Flow-through System

“…For example, Aharoni and Sparks (1991) describe sorbate transport processes in a solid-liquid system with several scenarios: transport of sorbate in the soil solution, transport across a liquid film at the solid-liquid interface, transport in a liquid-filled micropore, and diffusion of a sorbate at the soil surface or into a micropore. The "slow burn" (Rhue et al, 2002) displayed by the Clear Creek soil has been observed in other studies (Kabengi et al, 2006b;Harvey and Rhue, 2008). Since both soils were dominated by ligand exchange chemical mechanisms which are extremely fast (Sposito, 1994) explanation for the long "slow burn" for P sorption in the Clear Creek soil is that after the initial P sorption reactions occurred on the surfaces of minerals, further P sorption occurred only after the slow physical transport and diffusion of P into micropores (micropore scale physical nonequilibrium).…”

Selenium adsorption to aluminum-based water treatment residuals

“…A low defect kaolinite, Ca-rich montmorillonite, and an illite-smectite mixed layer clay were purchased from the Clay Minerals Society Source Clays Repository (West Lafayette, IN), while calcite was purchased from American Educational Products (Fort Collins, CO) and pulverized prior to use. Amorphous Al (hydr)oxide was created following the method outlined by Kabengi et al [30], where AlCl 3 was dissolved in 100 mL of distilled-deionized water, titrated drop-wise with NaOH to pH 6.5, allowed to stand overnight, centrifuged, solution discarded, and solid dried overnight at 65°C. The dried solid was pulverized prior to the Se adsorption experiment.…”

Precipitation of aluminum and magnesium secondary minerals from uranium mill raffinate (pH 1.0–10.5) and their controls on aqueous contaminants

“…Aluminum reference compounds were either synthesized or commercially produced. Basaluminite and amorphous Al(OH) 3 were synthesized via methods from literature (Adams and Rawajfih, 1977;Kabengi et al, 2006) and MgAlFe-hydrotalcite synthesized by Paikaray et al (2013) was acquired by the authors. Commercial gibbsite and Al 2 (SO 4 ) 3 were purchased from Sigma Aldrich.…”