Sorption of 238Pu on CEMIII/c and impact of Ca2+, Cl- and Isosaccharinic acid

Delphine Durce; Erik Coppens; Anneleen Vanleeuw; Florian Bocchese

Sorption of 238Pu on CEMIII/c and impact of Ca2+, Cl- and Isosaccharinic acid

Delphine Durce, Erik Coppens, Anneleen Vanleeuw, Florian Bocchese

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Abstract

This study investigated the sorption behaviour of plutonium (Pu) on CEM III/C mortar and more specifically, it examined the influence of chloride (Cl), calcium (Ca), and isosaccharinic acid (ISA) concentration on the solid-liquid distribution coefficient (Rd) of Pu. The study employed a design of experiments approach, using an I-optimal design to model the effects of these variables. Experimental results confirmed that ISA significantly reduces Pu sorption, with a minimum Rd observed at an ISA concentration of 10−2 M. In contrast, the impacts of Cl and Ca were minor, though statistically significant. Unlike earlier studies on CILVA mortar, no interaction effects between the variables were detected. The study also estimated the intrinsic equilibrium concentration of Ca in the CEM III/C system to be between 0.6 and 1.4 mmol/L, with a best estimate of 1 mmol/L.

Original language	English
Publisher	SCK CEN
Number of pages	26
State	Published - 9 Jan 2025

Publication series

Name	SCK CEN Reports
Publisher	SCK CEN
No.	ER-1401

Access to Document

ER-1401Final published version, 1.23 MBLicense: Other

Cite this

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title = "Sorption of 238Pu on CEMIII/c and impact of Ca2+, Cl- and Isosaccharinic acid",

abstract = "This study investigated the sorption behaviour of plutonium (Pu) on CEM III/C mortar and more specifically, it examined the influence of chloride (Cl), calcium (Ca), and isosaccharinic acid (ISA) concentration on the solid-liquid distribution coefficient (Rd) of Pu. The study employed a design of experiments approach, using an I-optimal design to model the effects of these variables. Experimental results confirmed that ISA significantly reduces Pu sorption, with a minimum Rd observed at an ISA concentration of 10−2 M. In contrast, the impacts of Cl and Ca were minor, though statistically significant. Unlike earlier studies on CILVA mortar, no interaction effects between the variables were detected. The study also estimated the intrinsic equilibrium concentration of Ca in the CEM III/C system to be between 0.6 and 1.4 mmol/L, with a best estimate of 1 mmol/L.",

keywords = "Blended cement, Sorption, Design of experiment, Isosaccharinic acid, Plutonium",

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T1 - Sorption of 238Pu on CEMIII/c and impact of Ca2+, Cl- and Isosaccharinic acid

AU - Durce, Delphine

AU - Coppens, Erik

AU - Vanleeuw, Anneleen

AU - Bocchese, Florian

N1 - Score=1 RN - ER-1401

PY - 2025/1/9

Y1 - 2025/1/9

N2 - This study investigated the sorption behaviour of plutonium (Pu) on CEM III/C mortar and more specifically, it examined the influence of chloride (Cl), calcium (Ca), and isosaccharinic acid (ISA) concentration on the solid-liquid distribution coefficient (Rd) of Pu. The study employed a design of experiments approach, using an I-optimal design to model the effects of these variables. Experimental results confirmed that ISA significantly reduces Pu sorption, with a minimum Rd observed at an ISA concentration of 10−2 M. In contrast, the impacts of Cl and Ca were minor, though statistically significant. Unlike earlier studies on CILVA mortar, no interaction effects between the variables were detected. The study also estimated the intrinsic equilibrium concentration of Ca in the CEM III/C system to be between 0.6 and 1.4 mmol/L, with a best estimate of 1 mmol/L.

AB - This study investigated the sorption behaviour of plutonium (Pu) on CEM III/C mortar and more specifically, it examined the influence of chloride (Cl), calcium (Ca), and isosaccharinic acid (ISA) concentration on the solid-liquid distribution coefficient (Rd) of Pu. The study employed a design of experiments approach, using an I-optimal design to model the effects of these variables. Experimental results confirmed that ISA significantly reduces Pu sorption, with a minimum Rd observed at an ISA concentration of 10−2 M. In contrast, the impacts of Cl and Ca were minor, though statistically significant. Unlike earlier studies on CILVA mortar, no interaction effects between the variables were detected. The study also estimated the intrinsic equilibrium concentration of Ca in the CEM III/C system to be between 0.6 and 1.4 mmol/L, with a best estimate of 1 mmol/L.

KW - Blended cement

KW - Sorption

KW - Design of experiment

KW - Isosaccharinic acid

KW - Plutonium

UR - https://ecm.sckcen.be/OTCS/llisapi.dll/open/89811241

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T3 - SCK CEN Reports

BT - Sorption of 238Pu on CEMIII/c and impact of Ca2+, Cl- and Isosaccharinic acid

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