Adsorption characteristics of U(VI) on Fe(III)Cr(III) (oxy)hydroxides synthesized at different temperatures

Hyangsig Ahn; Ho Young Jo; Young Jae Lee; Geon Young Kim

doi:10.1016/j.jenvrad.2016.03.020

Adsorption characteristics of U(VI) on Fe(III)Cr(III) (oxy)hydroxides synthesized at different temperatures

Hyangsig Ahn, Ho Young Jo, Young Jae Lee, Geon Young Kim

Department of Earth and Environmental Sciences

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

5 Citations (Scopus)

Abstract

In this study, the adsorption behavior of U(VI) on (oxy)hydroxides synthesized at different temperatures (25 and 75 °C) was investigated. Four (oxy)hydroxides were synthesized by drying slurries of Fe(III) and Fe(III). Cr(III) (oxy)hydroxide in a vacuum desiccator (25 °C) or in an oven (75 °C). Batch adsorption tests were conducted using the (oxy)hydroxides thus synthesized and groundwater containing uranium ions. In general, the U(VI) removal fraction significantly increased with increasing pH from 3 to 5, remained constant with increasing pH from 5 to 9, and decreased at pH greater than 9, regardless of the type of (oxy)hydroxides and solid-to-liquid ratio. The effect of pH on the U(VI) removal fraction was more significant at a low solid-to-liquid ratio. The oven-dried Fe(III) (oxy)hydroxide exhibited a U(VI) removal fraction lower than that of the vacuum-dried one, whereas the oven-dried Fe(III). Cr(III) (oxy)hydroxide exhibited a U(VI) removal fraction higher than that exhibited by the vacuum-dried one. X-ray photoelectron spectroscopy (XPS) analysis results indicated that the difference in the U(VI) removal fraction is attributed to the dissolution and precipitation of the Fe(III) (oxy)hydroxide during oven drying and dehydration of the Fe(III). Cr(III) (oxy)hydroxide during oven drying.

Original language	English
Pages (from-to)	30-37
Number of pages	8
Journal	Journal of Environmental Radioactivity
Volume	158-159
DOIs	https://doi.org/10.1016/j.jenvrad.2016.03.020
Publication status	Published - 2016 Jul 1

Bibliographical note

Funding Information:
This research was supported by the National Nuclear R&D program through the National Research Foundation of Korea (NRF) funded by Korea Ministry of Science, ICT & Future Panning ( NRF-2012M2A8A5025579 ) and Korea Ministry of Environment as “The GAIA project”.

Publisher Copyright:
© 2016 Elsevier Ltd.

Keywords

Adsorption
Fe(III) (oxy)hydroxide
Fe(III)Cr(III) (oxy)hydroxide
U(VI)

ASJC Scopus subject areas

Environmental Chemistry
Waste Management and Disposal
Pollution
Health, Toxicology and Mutagenesis

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10.1016/j.jenvrad.2016.03.020

Cite this

@article{2250cdb5446d4ee1a70885afd9065c9e,

title = "Adsorption characteristics of U(VI) on Fe(III)Cr(III) (oxy)hydroxides synthesized at different temperatures",

abstract = "In this study, the adsorption behavior of U(VI) on (oxy)hydroxides synthesized at different temperatures (25 and 75 °C) was investigated. Four (oxy)hydroxides were synthesized by drying slurries of Fe(III) and Fe(III). Cr(III) (oxy)hydroxide in a vacuum desiccator (25 °C) or in an oven (75 °C). Batch adsorption tests were conducted using the (oxy)hydroxides thus synthesized and groundwater containing uranium ions. In general, the U(VI) removal fraction significantly increased with increasing pH from 3 to 5, remained constant with increasing pH from 5 to 9, and decreased at pH greater than 9, regardless of the type of (oxy)hydroxides and solid-to-liquid ratio. The effect of pH on the U(VI) removal fraction was more significant at a low solid-to-liquid ratio. The oven-dried Fe(III) (oxy)hydroxide exhibited a U(VI) removal fraction lower than that of the vacuum-dried one, whereas the oven-dried Fe(III). Cr(III) (oxy)hydroxide exhibited a U(VI) removal fraction higher than that exhibited by the vacuum-dried one. X-ray photoelectron spectroscopy (XPS) analysis results indicated that the difference in the U(VI) removal fraction is attributed to the dissolution and precipitation of the Fe(III) (oxy)hydroxide during oven drying and dehydration of the Fe(III). Cr(III) (oxy)hydroxide during oven drying.",

keywords = "Adsorption, Fe(III) (oxy)hydroxide, Fe(III)Cr(III) (oxy)hydroxide, U(VI)",

author = "Hyangsig Ahn and Jo, {Ho Young} and Lee, {Young Jae} and Kim, {Geon Young}",

note = "Funding Information: This research was supported by the National Nuclear R&D program through the National Research Foundation of Korea (NRF) funded by Korea Ministry of Science, ICT & Future Panning ( NRF-2012M2A8A5025579 ) and Korea Ministry of Environment as “The GAIA project”. Publisher Copyright: {\textcopyright} 2016 Elsevier Ltd.",

year = "2016",

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doi = "10.1016/j.jenvrad.2016.03.020",

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T1 - Adsorption characteristics of U(VI) on Fe(III)Cr(III) (oxy)hydroxides synthesized at different temperatures

AU - Ahn, Hyangsig

AU - Jo, Ho Young

AU - Lee, Young Jae

AU - Kim, Geon Young

N1 - Funding Information: This research was supported by the National Nuclear R&D program through the National Research Foundation of Korea (NRF) funded by Korea Ministry of Science, ICT & Future Panning ( NRF-2012M2A8A5025579 ) and Korea Ministry of Environment as “The GAIA project”. Publisher Copyright: © 2016 Elsevier Ltd.

PY - 2016/7/1

Y1 - 2016/7/1

N2 - In this study, the adsorption behavior of U(VI) on (oxy)hydroxides synthesized at different temperatures (25 and 75 °C) was investigated. Four (oxy)hydroxides were synthesized by drying slurries of Fe(III) and Fe(III). Cr(III) (oxy)hydroxide in a vacuum desiccator (25 °C) or in an oven (75 °C). Batch adsorption tests were conducted using the (oxy)hydroxides thus synthesized and groundwater containing uranium ions. In general, the U(VI) removal fraction significantly increased with increasing pH from 3 to 5, remained constant with increasing pH from 5 to 9, and decreased at pH greater than 9, regardless of the type of (oxy)hydroxides and solid-to-liquid ratio. The effect of pH on the U(VI) removal fraction was more significant at a low solid-to-liquid ratio. The oven-dried Fe(III) (oxy)hydroxide exhibited a U(VI) removal fraction lower than that of the vacuum-dried one, whereas the oven-dried Fe(III). Cr(III) (oxy)hydroxide exhibited a U(VI) removal fraction higher than that exhibited by the vacuum-dried one. X-ray photoelectron spectroscopy (XPS) analysis results indicated that the difference in the U(VI) removal fraction is attributed to the dissolution and precipitation of the Fe(III) (oxy)hydroxide during oven drying and dehydration of the Fe(III). Cr(III) (oxy)hydroxide during oven drying.

AB - In this study, the adsorption behavior of U(VI) on (oxy)hydroxides synthesized at different temperatures (25 and 75 °C) was investigated. Four (oxy)hydroxides were synthesized by drying slurries of Fe(III) and Fe(III). Cr(III) (oxy)hydroxide in a vacuum desiccator (25 °C) or in an oven (75 °C). Batch adsorption tests were conducted using the (oxy)hydroxides thus synthesized and groundwater containing uranium ions. In general, the U(VI) removal fraction significantly increased with increasing pH from 3 to 5, remained constant with increasing pH from 5 to 9, and decreased at pH greater than 9, regardless of the type of (oxy)hydroxides and solid-to-liquid ratio. The effect of pH on the U(VI) removal fraction was more significant at a low solid-to-liquid ratio. The oven-dried Fe(III) (oxy)hydroxide exhibited a U(VI) removal fraction lower than that of the vacuum-dried one, whereas the oven-dried Fe(III). Cr(III) (oxy)hydroxide exhibited a U(VI) removal fraction higher than that exhibited by the vacuum-dried one. X-ray photoelectron spectroscopy (XPS) analysis results indicated that the difference in the U(VI) removal fraction is attributed to the dissolution and precipitation of the Fe(III) (oxy)hydroxide during oven drying and dehydration of the Fe(III). Cr(III) (oxy)hydroxide during oven drying.

KW - Adsorption

KW - Fe(III) (oxy)hydroxide

KW - Fe(III)Cr(III) (oxy)hydroxide

KW - U(VI)

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M3 - Article

C2 - 27060782

AN - SCOPUS:84962730025

SN - 0265-931X

VL - 158-159

SP - 30

EP - 37

JO - Journal of Environmental Radioactivity

JF - Journal of Environmental Radioactivity

ER -

Adsorption characteristics of U(VI) on Fe(III)Cr(III) (oxy)hydroxides synthesized at different temperatures

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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