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 | |
| Publication status | Published - 2016 Jul 1 |
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Keywords
- Adsorption
- Fe(III) (oxy)hydroxide
- Fe(III)Cr(III) (oxy)hydroxide
- U(VI)
ASJC Scopus subject areas
- Environmental Chemistry
- Health, Toxicology and Mutagenesis
- Waste Management and Disposal
- Pollution
Cite this
Adsorption characteristics of U(VI) on Fe(III)Cr(III) (oxy)hydroxides synthesized at different temperatures. / Ahn, Hyangsig; Jo, Ho Young; Lee, Young Jae; Kim, Geon Young.
In: Journal of Environmental Radioactivity, Vol. 158-159, 01.07.2016, p. 30-37.Research output: Contribution to journal › Article
}
TY - JOUR
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
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)
UR - http://www.scopus.com/inward/record.url?scp=84962730025&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84962730025&partnerID=8YFLogxK
U2 - 10.1016/j.jenvrad.2016.03.020
DO - 10.1016/j.jenvrad.2016.03.020
M3 - Article
C2 - 27060782
AN - SCOPUS:84962730025
VL - 158-159
SP - 30
EP - 37
JO - Journal of Environmental Radioactivity
JF - Journal of Environmental Radioactivity
SN - 0265-931X
ER -