Symmetry,
Journal Year:
2025,
Volume and Issue:
17(4), P. 516 - 516
Published: March 28, 2025
Biochar
(BC)
is
a
widely
studied
economic
and
environment-friendly
material.
However,
its
application
limited
by
underdeveloped
pore
structure,
small
specific
surface
area,
low
degree
of
graphitization,
difficulty
in
being
separated
from
liquids
during
the
process.
Raw
cotton
contains
almost
100%
cellulose
has
high
yield
for
preparing
biochar.
A
novel
type
magnetic
biochar
composite
was
prepared
impregnation–calcination
method
using
iron
nitrate
nonahydrate(Fe(NO3)3·9H2O).
The
material
characterized
scanning
electron
microscopy
(SEM),
energy
dispersive
spectroscopy
(EDS),
transmission
(TEM),
X-ray
diffraction
(XRD),
photoelectron
(XPS),
Raman
spectroscopy,
thermogravimetric
analysis
(TG),
area
testing
(BET).
results
show
that
FexOy
nanoparticles
with
uniform
morphology
an
average
particle
size
less
than
20
nm
are
embedded
composite;
saturation
magnetization
strength
reaches
21.6
emu/g;
compared
to
original
biochar,
larger
(326
m2/g).
As
adsorbent,
fast
removal
rate
Pb2+
95%
50
min.
Langmuir
model
calculation
maximum
adsorption
capacity
252.7
mg/g.
FexOy-BC
easily
achieves
solid–liquid
separation
can
be
recycled
wastewater
treatment
through
adsorption–desorption–regeneration.
