Dr. Keisuke Fukushi at Division of Terrestrial Environmental Studies constructed the predictive model for Pb(II) adsorption on soil minerals, and published the paper about the results in Geochimica et Cosmochimica Acta, volume 190.


Lead (Pb(II)) is toxic elements and the water with dissolved Pb(II) is harmful to human health. However, it is very easy to remove the Pb(II) in waters. You can remove Pb(II) from water by adding the soil in your garden to water and adjust the solution to alkaline pH. The fine grain minerals such as iron, aluminum and silicon oxides in the soil can strongly adsorb Pb(II) on their surfaces. In present study, we construct the chemical equilibria model to predict how much the dissolved Pb(II) can be removed at specific solution conditions by specific soil minerals based on the chemical speciation of Pb(II) revealed from spectroscopic observations.

Journal title:Geochimica et Cosmochimica Acta
Title:Predictive model for Pb(II) adsorption on soil minerals (oxides and low-crystalline aluminum silicate) consistent with spectroscopic evidence.
Authors:Usiyama T. and Fukushi K.