%0 Generic
%A Xiao, Chengliang
%A Fard, Zohreh Hassanzadeh
%A Sarma, Debajit
%A Song, Tze-Bin
%A Xu, Chao
%A Kanatzidis, Mercouri G.
%D 2017
%T Highly
Efficient Separation of Trivalent Minor Actinides
by a Layered Metal Sulfide (KInSn2S6) from Acidic
Radioactive Waste
%U https://acs.figshare.com/articles/dataset/Highly_Efficient_Separation_of_Trivalent_Minor_Actinides_by_a_Layered_Metal_Sulfide_KInSn_sub_2_sub_S_sub_6_sub_from_Acidic_Radioactive_Waste/5588764
%R 10.1021/jacs.7b10464.s002
%2 https://ndownloader.figshare.com/files/9717310
%K kinetic
%K trivalent 241 Am
%K removal
%K ion exchange process
%K 241 Am
%K actinide
%K KInSn 2 S 6
%K Trivalent Minor Actinides
%K Layered Metal Sulfide
%K KMS
%K pH
%K acidic solution
%K Acidic Radioactive Waste
%K metal sulfide materials
%K metal sulfide structure
%X 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.
%I ACS Publications