Nanomaterials,
Journal Year:
2025,
Volume and Issue:
15(5), P. 366 - 366
Published: Feb. 27, 2025
With
the
advancement
of
industrial
production
and
urban
modernization,
pollution
from
heavy
metal
ions
accumulation
solid
waste
have
become
critical
global
environmental
challenges.
Establishing
an
effective
recycling
system
for
removing
metals
wastewater
is
essential.
Coal
gangue
was
used
in
this
study
as
primary
material
synthesis
a
fully
coal
gangue-based
phosphorus-silicon-aluminum
(SAPO-5)
molecular
sieve
through
hydrothermal
process.
The
SAPO-5
characterized
several
methods,
including
X-ray
diffraction
(XRD),
scanning
electron
microscopy
(SEM),
BET
surface
analysis,
Fourier-transform
infrared
(FT-IR)
spectroscopy,
photoelectron
spectroscopy
(XPS),
to
examine
its
mineral
phases,
microstructure,
pore
characteristics,
structure.
Adsorption
performance
towards
with
Cd2+
Pb2+
investigated.
It
found
that
adsorption
processes
these
are
well
described
by
both
pseudo-second-order
model
Langmuir
isotherm.
According
model,
exhibited
maximum
capacities
93.63
mg·g-1
157.73
Pb2+.
After
five
cycles,
retained
strong
stability
adsorbing
Pb2+,
residual
77.03
138.21
excellent
mainly
attributed
mesoporous
channel
effects,
complexation
-OH
functional
groups,
electrostatic
attraction.
Biofuels Bioproducts and Biorefining,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 13, 2025
Abstract
In
recent
years
there
has
been
a
growing
interest
in
biochar
as
an
efficient
adsorbent
for
heavy
metal
wastewater
treatment
because
of
its
unique
physicochemical
properties
and
broad
applicability.
Biochar,
produced
through
the
pyrolysis
waste
biomass,
exhibits
well
developed
pore
structure,
high
specific
surface
area,
abundant
functional
groups,
which
collectively
confer
capacity
adsorption
metals.
This
review
summarizes
current
state
knowledge
on
preparation
methods,
properties,
mechanisms
removal.
It
highlights
impact
characteristics
such
pore‐size
distribution,
temperature,
performance.
also
examines
influence
solution
conditions,
including
pH,
ionic
strength,
adsorption.
The
explores
synergistic
effects
with
other
technologies,
anaerobic
digestion
membrane
technology,
to
enhance
efficiency.
Despite
significant
progress,
challenges
remain
optimizing
capacity,
regeneration,
recycling.
study
provides
comprehensive
insights
into
potential
limitations
treatment;
it
identifies
gaps
outlines
future
research
directions.
By
elucidating
relationship
between
performance
removal,
aim
this
is
guide
selection
appropriate
various
applications.
