Tin(IV) oxide nanoparticles grafted with N,N-dimethylacrylamide– allyl butyl ether for xylene adsorption|
Ardakani, A. Beheshti; Panahi, H.A.; Hasani, A.H.; Javid, A.H. & Moniri, E.
This study presents a two-stage method for
modification of tin(IV) oxide using (3-mercaptopropyl)
trimethoxysilane and grafting of N,N-dimethylacrylamideallyl
butyl ether copolymer. The resulting sorbent was
characterized by Fourier transform infrared spectroscopy,
elemental analysis, thermogravimetric analysis, transmission
electron microscopy, scanning electron microscopy,
and the Brunauer–Emmett–Teller method and evaluated
for xylene adsorption from environmental water samples.
Batch experiments were conducted to evaluate the effect of
the analytical parameters of pH, contact time, initial concentration
and temperature. The optimum pH was 5, contact
time was 5 min, and temperature for sorption of xylene
was 30 °C. The capacity of the sorbent was 8.56 mg g-1.
Results showed good accessibility of the active sites. The
equilibrium adsorption data of xylene sorption onto grafted
nano-tin(IV) oxide were analyzed using the Langmuir,
Freundlich, Temkin, and Redlich–Peterson isotherm models.
The adsorption data were modeled as pseudo-firstorder,
pseudo-second-order, and intra-particle diffusion
kinetic equations. The results show that adsorption followed
by the Langmuir isotherm and the pseudo-secondorder
model and intra-particle diffusion model showed
more than one process is controlling the adsorption process.
The sorbent removed more than 90 % of the xylene
from the water solution samples.
Xylene; Adsorption; Nanoparticles; Tin(IV) oxide; Modification; Grafting