Biochar,
Journal Year:
2025,
Volume and Issue:
7(1)
Published: Feb. 8, 2025
Abstract
In
this
research,
a
novel
metal-organic
framework-modified
biochar
composite
(MIL-88b@BC)
was
created
for
the
first
time
by
modifying
rice
husk
using
excellent
adsorption
properties
of
framework
(MOF),
as
well
reducing
solubility
MOF
substrate,
aiming
to
improve
understanding
characteristics
rare-earth
metal
recycling
and
predict
its
mechanism.
Density
functional
theory
(DFT)
computations
allowed
rationally
constructing
model.
According
DFT
calculations,
primary
processes
involved
in
La
3+
were
π–π
interaction
ligand
exchange,
wherein
surface
hydroxyl
group
played
crucial
role.
MIL-88b@BC
interacted
better
with
than
or
did.
Accompanying
batch
tests
theoretical
conjecture's
verification
demonstrated
that
pseudo-second-order
model
Langmuir
model,
respectively,
provided
good
fit
kinetics
isotherms.
The
maximum
capacity
MOF@BC
(288.89
mg
g
−1
)
achieved
at
pH
6.0,
which
significantly
higher
adsorbents'
previously
documented
capacities.
Confirming
estimations,
BC@MIL-88b
BC.
Additionally,
can
be
recycled
least
four
times.
To
mitigate
growing
scarcity
rare
earth
elements
(REEs)
lessen
their
negative
environmental
effects,
work
laid
path
effectively
treating
substantial
volumes
wastewater
produced
while
mining
REEs.
Highlights
adsorbent
prepared
situ
growth
method.
mechanism
innovatively
investigated
based
on
calculations.
Ligand
exchange
La–O–Fe
formation
dominated
lanthanide
ion
removal.
Graphical
Molecules,
Journal Year:
2025,
Volume and Issue:
30(5), P. 1048 - 1048
Published: Feb. 25, 2025
This
study
investigates
the
functionalization
of
a
poplar
biochar
(PB),
obtained
by
high-temperature
pyrolysis,
under
oxidative
conditions
typically
used
in
organic
synthesis.
In
particular,
concentrated
nitric
acid,
sulfonitric
mixture
and
piranha
were
applied
as
oxidants
at
different
temperatures
reaction
times.
order
to
assess
outcome
on
characteristics
resultant
products,
these
characterized
combination
imaging
(SEM),
spectroscopic
(ATR-FTIR,
RAMAN)
FFC-NMR
relaxometric
techniques.
The
latter
techniques,
rationalized
terms
Kohlrausch-type
stretched
exponential
kinetic
model,
analyzed
using
recently
developed
heuristic
Monte
Carlo
method,
providing
insights
into
water
dynamics
within
material
pore
networks.
Additionally,
water-holding
capacity
modified
biochars
their
abilities
adsorb
some
model
dyes
evaluated.
results
clarify
relationship
between
treatment
properties,
highlighting
impact
both
structural
modifications
porous
network,
enabling
us
identify
best
for
optimizing
features
oxidized
product.
