2010•Journal of the Nuclear Fuel Cycle and Waste Technology(JNFCWT)Open access
A Study of Adsorption Behaviour of Humic Acid and Americium on the Kaolinite
Myung Ho Lee, Kyu Whan Lee, Kyung Kyun Park, Euo Chang Jung, Kyuseok Song, Hyun Sang Shin
Open full text 0 citations
Abstract
In this study, the adsorption reactions in the binary component system such as kaolinite-humic acid, kaolinite-americium and humic acid-americium were investigated. After performing the basic physico-chemical properties of the kaolinite, the adsorption reactions of the humic acid on the kaolinite were carried out with varying concentration of humic acid and ion strength, and pH. With increasing HA concentration and pH, the sorption of HA onto KA decreased, while the sorption of HA onto KA increased with increasing ionic stre ngth. Also, with varying pH, the adsorption reactions of the americium-kaolinite and americium-humic acid were studied. In the acid and neutral region, Am easily adsorbed on the HA, while the sorption of Am on the HA in the alkali region decreased because of electrostatic repulsion. The results from these studies make it possible to understand the characteristics of adsorption behaviour of the americium by the humic acid in the water environment.