The effects of KI/Se(VI) molar ratio and initial concentration of Se(VI) on the reduction of Se(VI) to Se(IV) by KI

Tomohito Kameda; Yuuna Ishiyama; Toshiaki Yoshioka

doi:10.1007/s10311-007-0130-1

The effects of KI/Se(VI) molar ratio and initial concentration of Se(VI) on the reduction of Se(VI) to Se(IV) by KI

Tomohito Kameda, Yuuna Ishiyama, Toshiaki Yoshioka

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

2 Citations (Scopus)

Abstract

In this study, potassium iodide (KI) was found to be capable of reducing selenium(VI) to selenium(IV). When KI was added to Se(VI) solution, the Se(VI) concentration rapidly decreased with an increase in the KI/Se(VI) molar ratio. By using the potential-pH equilibrium diagram for the selenium/water system, we confirmed that Se(VI) reduced to Se(IV) because the potential of the solution shifted to the stable Se(IV) region upon the addition of KI. This reduction accompanies the oxidation of I^- to I₃^-. The reduction of Se(VI) by KI was found to be effective for concentrated Se(VI) solutions.

Original language	English
Pages (from-to)	247-249
Number of pages	3
Journal	Environmental Chemistry Letters
Volume	6
Issue number	4
DOIs	https://doi.org/10.1007/s10311-007-0130-1
Publication status	Published - 2008

Keywords

Potassium iodide
Potential
Potential-pH equilibrium diagram for the selenium/water system
Reduction
Selenium(IV)
Selenium(VI)

ASJC Scopus subject areas

Environmental Chemistry

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10.1007/s10311-007-0130-1

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title = "The effects of KI/Se(VI) molar ratio and initial concentration of Se(VI) on the reduction of Se(VI) to Se(IV) by KI",

abstract = "In this study, potassium iodide (KI) was found to be capable of reducing selenium(VI) to selenium(IV). When KI was added to Se(VI) solution, the Se(VI) concentration rapidly decreased with an increase in the KI/Se(VI) molar ratio. By using the potential-pH equilibrium diagram for the selenium/water system, we confirmed that Se(VI) reduced to Se(IV) because the potential of the solution shifted to the stable Se(IV) region upon the addition of KI. This reduction accompanies the oxidation of I- to I3-. The reduction of Se(VI) by KI was found to be effective for concentrated Se(VI) solutions.",

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T1 - The effects of KI/Se(VI) molar ratio and initial concentration of Se(VI) on the reduction of Se(VI) to Se(IV) by KI

AU - Kameda, Tomohito

AU - Ishiyama, Yuuna

AU - Yoshioka, Toshiaki

PY - 2008

Y1 - 2008

N2 - In this study, potassium iodide (KI) was found to be capable of reducing selenium(VI) to selenium(IV). When KI was added to Se(VI) solution, the Se(VI) concentration rapidly decreased with an increase in the KI/Se(VI) molar ratio. By using the potential-pH equilibrium diagram for the selenium/water system, we confirmed that Se(VI) reduced to Se(IV) because the potential of the solution shifted to the stable Se(IV) region upon the addition of KI. This reduction accompanies the oxidation of I- to I3-. The reduction of Se(VI) by KI was found to be effective for concentrated Se(VI) solutions.

AB - In this study, potassium iodide (KI) was found to be capable of reducing selenium(VI) to selenium(IV). When KI was added to Se(VI) solution, the Se(VI) concentration rapidly decreased with an increase in the KI/Se(VI) molar ratio. By using the potential-pH equilibrium diagram for the selenium/water system, we confirmed that Se(VI) reduced to Se(IV) because the potential of the solution shifted to the stable Se(IV) region upon the addition of KI. This reduction accompanies the oxidation of I- to I3-. The reduction of Se(VI) by KI was found to be effective for concentrated Se(VI) solutions.

KW - Potassium iodide

KW - Potential

KW - Potential-pH equilibrium diagram for the selenium/water system

KW - Reduction

KW - Selenium(IV)

KW - Selenium(VI)

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DO - 10.1007/s10311-007-0130-1

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The effects of KI/Se(VI) molar ratio and initial concentration of Se(VI) on the reduction of Se(VI) to Se(IV) by KI

Abstract

Keywords

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