Abstract
The
widespread
use
of
antibiotics
and
other
emerging
organic
pollutants
has
caused
serious
environmental
damage
potential
human
health
risks,
attracting
great
global
attention.
In
this
study,
coal
porous
carbon
(CC)
jarosite‐loaded
coal‐derived
(JCC)
were
prepared
using
raw
products
KOH
as
the
base
activator
products,
respectively,
for
removal
tetracycline
(TC)
from
water.
physical
properties,
specific
surface
area
pore
size
distribution
material
analyzed.
adsorption
efficiencies
mechanisms
coal,
CC,
JCC
materials
in
solutions
further
investigated.
reusability
characteristics
modified
adsorbent
also
explored.
results
revealed
abundant
mesopores
macropores
on
whereas
CC
had
predominantly
micropores
mesopores.
obtained
TC
rates
4.08,
4.61,
4.62
mg/g
materials,
corresponding
to
78,
88,
88.1%,
respectively.
maintained
high
(above
90%)
after
five
cycles
adsorption‐desorption
experiments,
demonstrating
excellent
material.
These
findings
provide
valuable
insights
into
development
advanced
future
remediation.
Sustainability,
Год журнала:
2024,
Номер
16(14), С. 5876 - 5876
Опубликована: Июль 10, 2024
The
use
of
coal-derived
activated
carbon
(AC)
for
water
treatment
applications
demands
more
sustainable
production
methods,
with
chemical
activation
emerging
as
a
promising
alternative
to
thermal
due
its
higher
AC
quality,
lower
burn-off,
and
yield.
study
explored
the
effect
surface
area,
particle
size
acid
washing
on
quality
derived
from
three
seams
lower-rank
Collie
coal
under
same
conditions
potassium
hydroxide
(KOH).
was
determined
by
area
iodine
number.
demonstrates
that
coal,
suitable
via
KOH
activation,
yielded
numbers
640
900
mg/g,
yields
53
57
wt.%.
Particle
influenced
yield,
finer
sizes
yielding
at
57–59
wt.%,
whereas
coarser
ones
around
58–65
SEM
analysis
shows
well-developed
porous
structure
in
carbons,
cleaner
particles
after
washing.
A
positive
correlation
exists
between
numbers,
values
samples
correlating
increased
resulting
AC.
regression
model’s
predicted
yield
coefficient
determination
(R²)
0.99.
Separations,
Год журнала:
2025,
Номер
12(2), С. 42 - 42
Опубликована: Фев. 8, 2025
The
separation
of
CH4
and
N2
is
essential
for
the
effective
use
low-concentration
coalbed
methane
(CBM).
In
this
study,
a
series
nitrogen-doped
porous
carbons
were
synthesized
using
an
in
situ
nitrogen
doping
method
combined
with
K2CO3
activation.
study
systematically
examined
how
changes
physical
structure
surface
properties
affected
their
CH4/N2
performance.
results
revealed
that
not
only
effectively
adjusts
pore
alters
reaction
on
carbon
matrix,
but
also
introduces
oxygen
functional
groups
significantly
enhance
adsorption
capabilities
materials.
particular,
sample
S3Y6−800
demonstrated
highest
capacity
2.23
mmol/g
at
273
K
1
bar,
outperforming
most
other
carbons.
This
exceptional
performance
attributed
to
introduction
N-5,
N-6,
C-O,
COOH
groups,
as
well
narrower
pore-size
distribution
(0.5–0.7
nm)
formation
nanotube
structures.
heteroatoms
provides
additional
sites
carbon,
thus
improving
its
capacity.
Furthermore,
dynamic
breakthrough
experiments
confirmed
all
samples
separated
nitrogen.
Toth
model
accurately
described
behavior
298
K,
suggesting
process
follows
sub-monolayer
coverage
mechanism
within
microporous
regions.
mild
environmentally
friendly
preparation
separation.
