Magnetochemistry,
Journal Year:
2024,
Volume and Issue:
10(10), P. 74 - 74
Published: Sept. 30, 2024
In
this
study,
amino-functionalized
magnetic
particles
(iron
oxide@SiO2-NH2)
with
core-shell
structures
were
synthesized
and
evaluated
for
rapid
boron
removal
from
aqueous
solutions.
The
results
showed
that
the
specific
surface
area
of
iron
oxide@SiO2-NH2
(131.24
m2⋅g−1)
increased
greatly
compared
to
pure
oxide
(30.98
m2⋅g−1).
adsorption
equilibrium
was
less
than
2
h,
an
capacity
29.76
mg⋅g−1
at
pH
=
6
15
°C.
quasi-second-order
kinetic
model
described
process
well,
both
Langmuir
Freundlich
models
suitable
characterizing
isotherms.
zeta
potential
XPS
analysis
before
after
revealed
main
mechanism
hydrogen
bonding
formation
between
terminal
-NH2
groups
adsorbent
boric
acid.
addition,
still
maintained
a
high
performance
five
adsorption–desorption
cycles,
which
illustrated
may
be
environmental
treatment.
Research Square (Research Square),
Journal Year:
2023,
Volume and Issue:
unknown
Published: Oct. 16, 2023
Abstract
Amino-functionalized
magnetic
particles
(Fe
3
O
4
@SiO
2
-NH
)
with
core-shell
structure
were
synthesized
and
evaluated
for
rapid
boron
removal
from
aqueous
solution.
Results
showed
that
the
specific
surface
area
of
Fe
(165.17
m
⋅g
−
1
increased
greatly
compared
to
pure
(49.07
).
The
adsorption
equilibrium
was
less
than
h
an
capacity
29.76
mg⋅g
at
pH
=
6
15°C.
quasi
second-order
kinetic
model
described
well
process
Freundlich
more
suitable
characterizing
isotherms.
Furthermore,
negative
value
Gibbs
free
energy
indicated
spontaneous
exothermic
process.
zeta
potential
XPS
analysis
before
after
revealed
main
mechanism
hydrogen
bonding
formation
between
terminal
–NH
groups
adsorbent
boric
acid.
In
addition,
still
maintained
a
high
performance
five
adsorption-desorption
cycles,
which
illustrated
may
be
environmental
treatment.
