Abstract
The elimination of trivalent minor actinides (Am3+, Cm3+) is of great concern for the safe management and operation of nuclear waste geological repository and environmental remediation. However, because of the effects of protonation, most of the present sorbents exhibit inferior removal properties toward minor actinides at low pH values. Finding stable ion-exchangers with high sorption capacities, fast kinetics, and good removal toward minor actinides from highly acidic solution remains a great challenge. This work reports a new family member of KMS materials with a robust acid-stable layered metal sulfide structure (KInSn2S6, KMS-5) bearing strong affinity toward trivalent minor actinides. KMS-5 can simultaneously separate trivalent 241Am and 152Eu from acidic solutions below pH 2 with high efficiency (>98%). The ion-exchange kinetics is extremely fast (<10 min) and the largest distribution coefficient is as high as 5.91 × 104 mL/g. KMS-5 is also capable of efficiently removing 241Am from acidic solution containing various competitive cations in large excess. In addition, the ion exchange process of 241Am by KMS-5 is reversible and the loaded material can be easily eluted by high concentration of potassium chloride. This work represents the first case for efficient minor actinides removal from highly acidic solution using layered metal sulfide materials.
| Original language | English |
|---|---|
| Pages (from-to) | 16494-16497 |
| Number of pages | 4 |
| Journal | Journal of the American Chemical Society |
| Volume | 139 |
| Issue number | 46 |
| DOIs | |
| Publication status | Published - Nov 22 2017 |
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ASJC Scopus subject areas
- Catalysis
- Chemistry(all)
- Biochemistry
- Colloid and Surface Chemistry
Cite this
Highly Efficient Separation of Trivalent Minor Actinides by a Layered Metal Sulfide (KInSn2S6) from Acidic Radioactive Waste. / Xiao, Chengliang; Hassanzadeh Fard, Zohreh; Sarma, Debajit; Song, Tze Bin; Xu, Chao; Kanatzidis, Mercouri G.
In: Journal of the American Chemical Society, Vol. 139, No. 46, 22.11.2017, p. 16494-16497.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Highly Efficient Separation of Trivalent Minor Actinides by a Layered Metal Sulfide (KInSn2S6) from Acidic Radioactive Waste
AU - Xiao, Chengliang
AU - Hassanzadeh Fard, Zohreh
AU - Sarma, Debajit
AU - Song, Tze Bin
AU - Xu, Chao
AU - Kanatzidis, Mercouri G
PY - 2017/11/22
Y1 - 2017/11/22
N2 - The elimination of trivalent minor actinides (Am3+, Cm3+) is of great concern for the safe management and operation of nuclear waste geological repository and environmental remediation. However, because of the effects of protonation, most of the present sorbents exhibit inferior removal properties toward minor actinides at low pH values. Finding stable ion-exchangers with high sorption capacities, fast kinetics, and good removal toward minor actinides from highly acidic solution remains a great challenge. This work reports a new family member of KMS materials with a robust acid-stable layered metal sulfide structure (KInSn2S6, KMS-5) bearing strong affinity toward trivalent minor actinides. KMS-5 can simultaneously separate trivalent 241Am and 152Eu from acidic solutions below pH 2 with high efficiency (>98%). The ion-exchange kinetics is extremely fast (<10 min) and the largest distribution coefficient is as high as 5.91 × 104 mL/g. KMS-5 is also capable of efficiently removing 241Am from acidic solution containing various competitive cations in large excess. In addition, the ion exchange process of 241Am by KMS-5 is reversible and the loaded material can be easily eluted by high concentration of potassium chloride. This work represents the first case for efficient minor actinides removal from highly acidic solution using layered metal sulfide materials.
AB - The elimination of trivalent minor actinides (Am3+, Cm3+) is of great concern for the safe management and operation of nuclear waste geological repository and environmental remediation. However, because of the effects of protonation, most of the present sorbents exhibit inferior removal properties toward minor actinides at low pH values. Finding stable ion-exchangers with high sorption capacities, fast kinetics, and good removal toward minor actinides from highly acidic solution remains a great challenge. This work reports a new family member of KMS materials with a robust acid-stable layered metal sulfide structure (KInSn2S6, KMS-5) bearing strong affinity toward trivalent minor actinides. KMS-5 can simultaneously separate trivalent 241Am and 152Eu from acidic solutions below pH 2 with high efficiency (>98%). The ion-exchange kinetics is extremely fast (<10 min) and the largest distribution coefficient is as high as 5.91 × 104 mL/g. KMS-5 is also capable of efficiently removing 241Am from acidic solution containing various competitive cations in large excess. In addition, the ion exchange process of 241Am by KMS-5 is reversible and the loaded material can be easily eluted by high concentration of potassium chloride. This work represents the first case for efficient minor actinides removal from highly acidic solution using layered metal sulfide materials.
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U2 - 10.1021/jacs.7b10464
DO - 10.1021/jacs.7b10464
M3 - Article
AN - SCOPUS:85035011841
VL - 139
SP - 16494
EP - 16497
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 46
ER -