Formation of Tc(IV) Colloids and Coagulation Processes

Saiko Naito; Tsutomu Sekine; Yasushi Kino; Hiroshi Kudo

doi:10.1524/ract.1998.82.special-issue.129

Formation of Tc(IV) Colloids and Coagulation Processes

Saiko Naito, Tsutomu Sekine, Yasushi Kino, Hiroshi Kudo

SCI - Chemistry

Tohoku University

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Coagulation processes of Tc(IV) colloids in aqueous solution formed by the reduction of pertechnetate (TcO₄^-) with stannous ions (Sn²⁺) were investigated. The Tc(IV) colloids formed at the concentration near the solubility of TcO₂ · nH₂O were found stable toward coagulation and dispersed in the solution at least for 2 months. When the concentration of technetium was as high as 6 × 10^-5 mol · L^-1, the particle size of the colloids gradually increased in several days depending on the ionic strength. The observed growth rate of colloid particles was successfully analyzed by a newly developed collision model, in which both the distribution of the kinetic energy of particles and the potential barrier between the two particles played significant roles.

Original language	English
Pages (from-to)	129-132
Number of pages	4
Journal	Radiochimica Acta
Volume	82
Issue number	1
DOIs	https://doi.org/10.1524/ract.1998.82.special-issue.129
Publication status	Published - 1998

Keywords

Coagulation of colloid
Collision model
DLVO theory
Tc(IV) colloids

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10.1524/ract.1998.82.special-issue.129

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abstract = "Coagulation processes of Tc(IV) colloids in aqueous solution formed by the reduction of pertechnetate (TcO4-) with stannous ions (Sn2+) were investigated. The Tc(IV) colloids formed at the concentration near the solubility of TcO2 · nH2O were found stable toward coagulation and dispersed in the solution at least for 2 months. When the concentration of technetium was as high as 6 × 10-5 mol · L-1, the particle size of the colloids gradually increased in several days depending on the ionic strength. The observed growth rate of colloid particles was successfully analyzed by a newly developed collision model, in which both the distribution of the kinetic energy of particles and the potential barrier between the two particles played significant roles.",

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T1 - Formation of Tc(IV) Colloids and Coagulation Processes

AU - Naito, Saiko

AU - Sekine, Tsutomu

AU - Kino, Yasushi

AU - Kudo, Hiroshi

PY - 1998

Y1 - 1998

N2 - Coagulation processes of Tc(IV) colloids in aqueous solution formed by the reduction of pertechnetate (TcO4-) with stannous ions (Sn2+) were investigated. The Tc(IV) colloids formed at the concentration near the solubility of TcO2 · nH2O were found stable toward coagulation and dispersed in the solution at least for 2 months. When the concentration of technetium was as high as 6 × 10-5 mol · L-1, the particle size of the colloids gradually increased in several days depending on the ionic strength. The observed growth rate of colloid particles was successfully analyzed by a newly developed collision model, in which both the distribution of the kinetic energy of particles and the potential barrier between the two particles played significant roles.

AB - Coagulation processes of Tc(IV) colloids in aqueous solution formed by the reduction of pertechnetate (TcO4-) with stannous ions (Sn2+) were investigated. The Tc(IV) colloids formed at the concentration near the solubility of TcO2 · nH2O were found stable toward coagulation and dispersed in the solution at least for 2 months. When the concentration of technetium was as high as 6 × 10-5 mol · L-1, the particle size of the colloids gradually increased in several days depending on the ionic strength. The observed growth rate of colloid particles was successfully analyzed by a newly developed collision model, in which both the distribution of the kinetic energy of particles and the potential barrier between the two particles played significant roles.

KW - Coagulation of colloid

KW - Collision model

KW - DLVO theory

KW - Tc(IV) colloids

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Formation of Tc(IV) Colloids and Coagulation Processes

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Keywords

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