Molecules,
Год журнала:
2024,
Номер
29(17), С. 4262 - 4262
Опубликована: Сен. 9, 2024
Phosphoric
acid
is
used
as
a
chemical
activator
to
prepare
coconut
shell
carbon
(PCSC),
and
for
investigating
rhodamine
B
(RhB)
adsorption
performance.
The
optimal
conditions
the
preparation
of
PCSC
(calcined
temperature,
phosphoric
concentration),
influence
(concentration,
pH,
etc.)
on
RhB
recovery
performance
are
investigated.
Experimental
results
show
that
when
amount
(600
°C,
2
h)
0.2
g,
initial
concentration
10
mg/L,
pH
=
6,
time
30
min,
it
can
have
95.84%
efficiency.
Liquid
ultraviolet
spectroscopy
also
supports
this
Characterization
data
showed
hydroxyl
ester
groups,
aromatic
structures,
PO43−
existed
surface
PCSC,
decreased
with
increasing
calcined
temperature.
has
BET
(N2)
area
408.59
m2/g
micropore
distribution,
EDS-detected
P
content
3.91%.
SEM
formed
micropores
which
could
better
adsorb
RhB.
kinetic
thermodynamic
analysis
by
process
was
in
accord
quasi-secondary
equations
ΔGθ
between
−1.65
−18.75
kJ/mol.
physical
spontaneous
endothermic
reaction,
obtained
sorption
isotherms
were
classified
Langmuir-type.
mechanism
includes
pore
diffusion,
hydrogen
bonding,
π−π
conjugation.
prepared
H3PO4
modification
superior
recycling
RhB,
providing
reference
other
biomass
materials
treatment
dye
wastewater.
Materials Research Express,
Год журнала:
2024,
Номер
11(4), С. 045508 - 045508
Опубликована: Март 22, 2024
Abstract
Widespread
environmental
pollution
caused
by
the
misuse
of
tetracyclines
(TCs)
has
become
a
global
issue,
necessitating
development
water
treatment
materials
for
antibiotic
removal.
Magnetic
biochar
(MBC)
possesses
several
advantages,
including
wide
range
raw
material
sources
and
low
cost,
making
it
potential
adsorbent
that
overcomes
limitations
(BC)
regarding
solid–liquid
separation.
In
this
study,
peanut
shell-derived
magnetic
loaded
with
Fe
3
O
4
(Fe
/BC)
was
prepared
to
study
its
adsorption
performance
factors
TCs.
The
mechanism
revealed
using
isotherms,
kinetics
thermodynamics.
results
showed
total
pore
volume
increased,
surface
oxygen-containing
functional
groups
were
formed
before
BC
modification.
pH
range,
/BC
high
TCs,
an
rate
over
85%.
Chemical
main
mechanism,
hydrogen
bonding,
as
well
π
-
interactions,
electrostatic
intrapore
diffusion
hydrophobic
interactions.
Moreover,
reusability
obtaining
cost
analyzed,
demonstrating
promising
application
prospects.
This
will
promote
in
removal
antibiotics
pollutants
from
water.
