Coordination of adsorbed boron: a FTIR spectroscopic study

Article Abstract:

Attenuated total reflectance Fourier transform infrared spectroscopy was used to study the adsorption of boron (B) species on amorphous aluminum and iron hydroxides, kaolinite and allophane as a function of temperature, pH and B concentration. The goal was to understand adsorption at solid-liquid interfaces, which affects the removal of environmental contaminants via its effects on the mobility of ions. The results showed that B adsorption depends on temperature, pH, B concentration and mineral type. Coordination of two boron species adsorbed on mineral surfaces was also observed.

Boron, Boron (Chemical element)

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Modeling radiocesium fixation in upland organic soils of Northwest England

Article Abstract:

The kinetics of Cesium (Cs) transport in soil were investigated in two models of time-dependent 137Cs adsorption and fixation by soil. Each model described Cs in terms of solution, adsorbed labile, and fixed pools. Cs adsorption to fixed pools involved either a kinetic step (model I) or a diffusive process (model II). Estimated kinetics parameters were consistent with those measured experimentally. A comparison with the predicted changes in Chernobyl 137Cs bioavailability showed model I to be the more appropriate model of Cs transport kinetics.

Models, Cesium, Bioavailability

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Copper mobility in a copper-contaminated sandy soil as affected by pH and solid and dissolved organic matter

Article Abstract:

The mobility of copper in copper-contaminated soils is sensitive to pH and calcium concentration in a medium where dissolved organic material is present. The experiment was conducted to enable the modeling of copper mobility under the non-ideal competitive adsorption (NICA) model. This would enable researchers to predict copper concentrations using soil copper content, pH and solid/dissolved organic materials concentration as parameters.

Research and Development in the Physical, Engineering, and Life Sciences, Pollution Control R&D, Control, Pollution control research, Copper, Soil chemistry, Hazardous wastes

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