Adsorption and retarded diffusion of Eu^III-EDTA⁻ through hard clay rock

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• 作者：Michael Descostes^a ; ¹ ; Ingmar Pointeau^a ; ² ; Jean Radwan^a ; Jenna Poonoosamy^a ; ³ ; Jean-Luc Lacour^b ; Denis Menut^b ; ⁴ ; Thomas Vercouter^b ; Romain V.H. Dagnelie^a ; ^{romain.dagnelie@cea.fr}
• 关键词：Europium ; EDTA ; Organic ; Diffusion ; Adsorption ; Clay rock
• 刊名：Journal of Hydrology
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：544
• 期：Complete
• 页码：125-132
• 全文大小：780 K
• 卷排序：544

文摘

EDTA diffusion in COx clay rock was studied using [EuIII-EDTA]−. Adsorption of Eu was driven by anions adsorption at high EDTA concentration. Anion exclusion in COx clay rock induced low diffusivities of EDTA complexes. Diffusion was less retarded than predicted from adsorption on crushed clay. This early break-through was contrary to the data obtained on oxides containing rocks.