Additional Material Section
Figure AM1: Scheme for the synthesis of DETA-functionalized chitosan magnetic nanobased particles.
(Reproduced with permission from Elsevier; M.G. MAHFOUZ, A.A. GALHOUM, N.A. GOMAA,
S.S. ABDEL-REHEM, A.A. ATIA, T. VINCENT, E. GUIBAL, “Uranium extraction using magnetic
nano-based particles of diethylenetriamine-functionalized chitosan: Equilibrium and kinetic studies”,
Chem. Eng. J., 262, 198-209 (2015) (DOI: 10.1016/j.cej.2014.09.061).
Figure AM2: FT-IR spectra of (a) chitosan-magnetite nanoparticles, (b) after cross-linking,
(c) crosslinked chitosan magnetite with spacer arm and (d) DETA-functionalized chitosan
magnetic nano-based particles.
(Reproduced with permission from Elsevier; M.G. MAHFOUZ, A.A. GALHOUM, N.A. GOMAA,
S.S. ABDEL-REHEM, A.A. ATIA, T. VINCENT, E. GUIBAL, “Uranium extraction using magnetic
nano-based particles of diethylenetriamine-functionalized chitosan: Equilibrium and kinetic studies”,
Chem. Eng. J., 262, 198-209 (2015) (DOI: 10.1016/j.cej.2014.09.061).
100
80
Intensity (A.U)
(311)
Amine Type
(111)
60
(220)
40
(511) (440)
(400) (422)
(622)
20
0
10
20
30
40
50
60
70
80
2 Theta (Degree)
Figure AM3: Powder X-ray diffraction (XRD) pattern of DETA-functionalized chitosan
magnetic nano-based particles.
(Reproduced with permission from Elsevier; M.G. MAHFOUZ, A.A. GALHOUM, N.A. GOMAA,
S.S. ABDEL-REHEM, A.A. ATIA, T. VINCENT, E. GUIBAL, “Uranium extraction using magnetic
nano-based particles of diethylenetriamine-functionalized chitosan: Equilibrium and kinetic studies”,
Chem. Eng. J., 262, 198-209 (2015) (DOI: 10.1016/j.cej.2014.09.061).
130.18
[nm]
2.00 um
5.00 x 5.00 um
0.00
sample1
Figure AM4: AFM and TEM photographs of DETA-functionalized chitosan magnetic nanobased particles.
(Reproduced with permission from Elsevier; M.G. MAHFOUZ, A.A. GALHOUM, N.A. GOMAA,
S.S. ABDEL-REHEM, A.A. ATIA, T. VINCENT, E. GUIBAL, “Uranium extraction using magnetic
nano-based particles of diethylenetriamine-functionalized chitosan: Equilibrium and kinetic studies”,
Chem. Eng. J., 262, 198-209 (2015) (DOI: 10.1016/j.cej.2014.09.061).
Figure AM5: Magnetization curve of DETA-functionalized chitosan magnetic nano-based
particles.
(Reproduced with permission from Elsevier; M.G. MAHFOUZ, A.A. GALHOUM, N.A. GOMAA,
S.S. ABDEL-REHEM, A.A. ATIA, T. VINCENT, E. GUIBAL, “Uranium extraction using magnetic
nano-based particles of diethylenetriamine-functionalized chitosan: Equilibrium and kinetic studies”,
Chem. Eng. J., 262, 198-209 (2015) (DOI: 10.1016/j.cej.2014.09.061).
60
8
Dy
40
Yb
6
Nd
30
Dy
20
Yb
4
pHf
q (mg metal g-1)
Nd
50
2
10
0
0
0
2
4
pHi
6
8
Figure AM6: pH effect on RE(III) sorption capacities using DETA-functionalized chitosan
magnetic nano-based particles (including pH variation: pHf vs. pHi).
1.3
Nd(III)
log (qe - q(t))
0.9
Dy(III)
Yb(III)
0.5
0.1
0
60
120
180
-0.3
-0.7
Time (min)
t/q(t) (min g min-1)
8
6
4
Nd(III)
2
Dy(III)
Yb(III)
0
0
60
120
180
240
Time (min)
300
360
60
q(t) (mg metal g-1)
50
40
30
20
Nd(III)
Dy(III)
10
Yb(III)
0
0
4
8
12
Time0.5 (min0.5)
16
20
Figure AM7: Linearized plots of uptake kinetics for Nd(III), Dy(III) and Yb(III) sorption
using DETA-functionalized chitosan magnetic nano-based particles: PFORE, PSORE and
simplified RIDE models.
Ceq/q (g L-1)
6
Nd(III)
4
T: 300 K
T: 310 K
T: 320 K
2
0
0
50
Ceq/q (g L-1)
6
100
150
200
Ceq (mg Nd L-1)
250
300
Dy(III)
4
T: 300 K
T: 310 K
T: 320 K
2
0
0
50
Ceq/q (g L-1)
6
100
150
200
250
Ceq (mg Dy L-1)
300
Yb(III)
4
T: 300 K
T: 310 K
T: 320 K
2
0
0
50
100
150
200
250
Ceq (mg Yb L-1)
300
Figure AM8: Linearized plots of Langmuir equation for the sorption of Nd(III), Dy(III) and
Yb(III) using DETA-functionalized chitosan magnetic nano-based particles.
ε2
0
600
1200
1800
2400
3000
-1
Nd(III)
y = -4E-05x - 1.0313
ln qe
-1.1
y = -5E-05x - 1.0503
300 K
310 K
320 K
-1.2
y = -6E-05x - 1.0766
-1.3
0
1000
ε2
2000
3000
4000
-1.1
y = -3E-05x - 1.1484
-1.2
ln qe
y = -3E-05x - 1.1582
300 K
-1.3
310 K
y = -4E-05x - 1.1714
320 K
Dy(III)
-1.4
0
1000
ε2
2000
3000
4000
-1.1
300 K
Yb(III)
y = -2E-05x - 1.2012
-1.3
310 K
320 K
ln qe
-1.2
y = -3E-05x - 1.2084
y = -4E-05x - 1.2138
-1.4
Figure AM9: Linearized plots of Dubinin-Radushkevich equation for the sorption of Nd(III),
Dy(III) and Yb(III) using DETA-functionalized chitosan magnetic nano-based particles.
Table AM1: Modeling of uptake kinetics using the simplified RIDE model for Nd(III),
Dy(III) and Yb(III) sorption (at 27oC and pHi 5).
Simplified RIDE
Metal ion
C
kp,
-1
mg g
-1
mg g min
-0.5
R2
Nd(III)
25.0
1.50
0.523
Dy(III)
26.8
1.58
0.507
Yb(III)
26.9
1.61
0.512