Reactive and functional clay through UV-triggered
thiol-ene interfacial click reaction
Radhia Msaadi1,, Amor Gharsalli2, Samia Mahouche-Chergui3,, Sophie Nowak4,
Hanene Salmi3, Benjamin Carbonnier3, Salah Ammar1,*, Mohamed M. Chehimi3,4,*
1
Université de Gabès, Faculté des Sciences, Département de Chimie, Gabès, Tunisia
Université de Gabès, École Nationale d'Ingénieurs, Gabès, Tunisia
3
Université Paris Est, ICMPE, SPC, PoPI team, UPEC, 2-8 rue Henri Dunant, 94320 Thiais, France.
4
Univ Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR CNRS 7086, 15 rue JA De Baïf, France.
2
SUPPORTING INFORMATION SI1
MMT-MSA
MMT-MA
1715
1634
2951
1013
2841
MMT-Na
3413
1641
1030
3624
Intensity (a.u.)
2881
1004
4500
4000
3500
3000
2500
2000
1500
1000
Wavenumbers (cm-1)
IR spectra of MMT-Na, MMT-MA and MMT-MSA.
500
SUPPORTING INFORMATION SI2
MMT-Na
MMT-MA
MMT-MSA
Intensity (a. u.)
 Quartz -98-008-0349
 Montmorillonite - 98-016-1171
 Kaolinite -98-003-0285




0
Illite - 98-016-6964


20



40
60
80
100

XRD patterns of MMT- Na, MMT-MA and MMT-MSA.
SUPPORTING INFORMATION SI3
Lead was detected at the surface of the adsorbent MMT-MSA. The spectral 60-180 eV
spectral regions from MMT-MSA after removal of Pb(II) displays Pb4f7/2-Pb4f5/2 doublet
centred at 139.4-144.3 eV. These binding energies are consistent with Pb(II) from lead nitrate
[1,2].
SUPPORTING INFORMATION SI4
The kinetic model of the first-order rate expression of Lagergren based on solid capacity is
generally expressed by [3]:
q= qe (1 − e−k1∗t )
(1)
where, k1(1/min)is the pseudo first-order rate constant for the adsorption process, qe and q are
the metal ion content that adsorbed per gram of MMT-MSA (mg Pb(II)/g) at equilibrium and
at time t (min), respectively.
The kinetic model of the pseudo-second-order Pb(II) adsorption is[4]:
q=
k2 q2e t
1+k2 qe t
(2)
where, k2(g/(mg.min)) is the rate constant of the adsorption process, qe and q are the metal
ion content adsorbed per gram of MMT-MSA (mg Pb2 + /g) at equilibrium and at time t (min),
respectively.
Kinetic constants for Pb(II) adsorption onto MMT-Na and MMT-MSA.
Samples
MMT-Na
MMT-MSA
qexp
47.63
72.3
Pseudo-first-order
qe
K1
R²
55.49 0.0139 0.9506
73.45 0.0615 0.9271
Pseudo-second-order
qexp
qe
K2
47.63 75.93 1.49708E-4
72.3
81.4
9.80406E-4
R²
0.916
0.887
SUPPORTING INFORMATION SI5
The Langmuir model and is given by [5]:
q=
𝑞𝑚 ∗ 𝐶𝑒 ∗ 𝐾𝐿
(3)
1+(𝐶𝑒 ∗ 𝐾𝐿 )
where q (mg/g) is the adsorbed amount at equilibrium, Ce is the equilibrium concentration of
the metal ions (mg/L), KL is Langmuir equilibrium constant (L/mg) and qm the maximum
adsorption capacity (mg/g).
The empirical Freundlich isotherm is obtained on the assumption that the sorption takes place
on a heterogeneous sorbent surface. It is also applicable to multilayer sorption and is
expressed by [6]:
q= 𝐾𝐹 (𝐶𝑒 )
1
𝑛
(4)
where KF (mg 1−1/ n /g L 1/ n ) is the Freundlich constant and n is the heterogeneity factor. The
KF value is related to the adsorption capacity; while 1/n value is related to the sorption
intensity.
[1] V. I. Nefedov, Y. V. Salyn and X. Keller, Zh. Neorg. Khimii1979, 24, 2564
[2] J. A. Taylor J.A., G. M. Lancaster and J. W. Rabalais, J. Electron Spectrosc. Relat.
Phenom. 1978, 13, 435-444.
[3] S. Lagergren, Kungliga Svenska Vetenskapsakademiens Handlingar 1898, 24, 1-39
[4] Y. S. Ho and G McKay, Process Biochem.,1999,34, 451–465.
[5] I. Langmuir, J Am ChemSoc, 1918, 40, 1361–1403
[6] H. M. F. Freundlich, Z Phys Chem., 1906, 57,385–470.