removing Zn with 6mol·L-1 HCl solution, 67Ga was
First, starch solution (0.5%) as emulsion stabilizer
back-extracted with 1mol·L-1 HCl solution.
was loaded into reactor and kept temperature of 323K.
3. Result and discussion
Then, organic phase reaction mixture containing sty-
3.1. Extractions of Ga and Zn by extractant polymer
rene, divinylbenzene and initiator (benzoyl peroxide)
resin (static condition)
was fed into reactor under 323K and working mixer for
3.1.1. Extraction equilibrium time
30min. Co-polymerization reaction was carried out un-
Under the static condition (6 mol·L-1 HCl solution,
der 353K for 8h and continuing polymerization reaction
1g of extractant resin), experimental results of determin-
under 363K for 1h. After reaction was finished, synthe-
ing extractability of Ga and Zn were shown in Table.1.
sized polymer was separated by decantation, washed
2~3 times with deionized water and dried.
Table 1.
Extractability (%) of Ga and Zn to TBP extractant polymer resin by time on HCl solutionExtractability (%)
time(min)
Ga
Zn
4
31.5
72.5
8
76.3
98.2
12
97.9
98.7
16
99.4
98.6
20
98.5
-
47
Журнал «Интернаука»
№ 16 (145), часть 3, 2020 г.
As shown in Table.
Extraction distribution coefficient of Ga (III) and
1, extraction equilibrium times of Ga and Zn were
Zn (II) was calculated by measuring radioactivity of
12.4min and 8min.
samples before and after vibrating. (Table.2)
3.1.2. Determining extraction distribution coeffi-
cient
Table 2.
Extraction distribution coefficient (Kd) of Ga and Zn to TBP extractant polymer resin (static condition)Conc. of HCl
extraction distribution coefficient ( Kd)
(mol·L-1)
Ga
Zn
0.1
0.01
0.08
1.0
1.1
12.3
2.0
27.5
18.8
3.0
104.6
32.8
4.0
816.7
22
6.0
1360
3.8
8.0
1845
1.4
As shown in Table.2, distribution coefficient of Ga
3.2.1. Determining extraction distribution coeffi-
was increased by concentration of HCl. Distribution
cient and column equilibrium constant
coefficient of Ga and Zn were 357.9 and 1317.9 on 6.8
On the column, while 67Ga and 65Zn were extracted
mol·L-1 HCl solution.
on 6 mol·L-1 HCl, maximum eluent volumes ( Vmax) were 3.2. Extractions of Ga and Zn by extractant polymer
416mL and 1.2mL. Base on those, column equilibrium
resin (dynamic condition)
constant and distribution coefficient on the column were
shown in Table. 3.
Table 3.
Equilibrium constant and distribution coefficient of 67Ga and 65Zn on the column
Column equilibrium constant ( D)
Extraction distribution coefficient on the column (