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2002•Chemistry LettersRequires access

Sorption of Eu(III) on Kaolinite in the Presence of Humic Acid: Effects of Ionic Strength

Tomofumi Sakuragi, Seichi Sato, Tamotsu Kozaki

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Abstract

Abstract The effects of ionic strength on the sorption of Eu(III) on kaolinite in the presence of humic acid (HA) were examined using a batch method. Eu(III) sorption increased with increased ionic strengths in the pH range of 6 to 10, but was insensitive to ionic strength in the pH range below 5. Adsorption of HA onto kaolinite also increased in the pH range of 6 to 10, indicating that the increase in adsorption of Eu(III)-humate complexes is a predominant process for the increase in Eu(III) sorption.

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What this paper is about

Abstract The effects of ionic strength on the sorption of Eu(III) on kaolinite in the presence of humic acid (HA) were examined using a batch method. Eu(III) sorption increased with increased ionic strengths in the pH range of 6 to 10, but was insensitive to ionic strength in the pH range below 5. Adsorption of HA onto kaolinite also increased in the pH range of 6 to 10, indicating that the increase in adsorption of Eu(III)-humate complexes is a predominant process for the increase in Eu(III) sorption.

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Available abstract

Abstract The effects of ionic strength on the sorption of Eu(III) on kaolinite in the presence of humic acid (HA) were examined using a batch method. Eu(III) sorption increased with increased ionic strengths in the pH range of 6 to 10, but was insensitive to ionic strength in the pH range below 5. Adsorption of HA onto kaolinite also increased in the pH range of 6 to 10, indicating that the increase in adsorption of Eu(III)-humate complexes is a predominant process for the increase in Eu(III) sorption.

Key concepts: Sorption, Chemistry, Ionic strength, Kaolinite, Humic acid, Adsorption, Inorganic chemistry, Ionic bonding

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