Environmental Technology & Innovation,
Journal Year:
2024,
Volume and Issue:
34, P. 103611 - 103611
Published: March 26, 2024
Biochar
is
considered
an
environmentally
friendly
and
cost-effective
option
for
removing
antibiotics
from
aqueous
solutions.
In
this
study,
biochar
derived
rice
straw
(RBC)
was
sequentially
modified
by
KMnO4
NaOH
(Mn/Na-RBC)
to
achieve
ciprofloxacin
(CIP)
removal.
To
explore
the
adsorption
mechanisms
between
Mn/Na-RBC
CIP,
characterization
analyses,
isotherms,
thermodynamics,
kinetics
were
investigated.
The
results
revealed
that
significantly
increased
specific
surface
area
(154.12
m2·g–1),
carbonization,
number
of
oxygen-containing
functional
groups
compared
with
pristine
biochar,
thereby
substantially
enhancing
CIP
capacity.
Through
fitting
model,
it
found
highest
capacity
32.25
mg·g–1
under
acidic
conditions
(pH=3),
pseudo-second-order
Freundlich
model
fit
behavior
well.
main
process
pore
filling,
electrostatic
interaction,
H-bonding,
π–π
conjugation,
n–π
interaction
complexation.
Moreover,
still
exhibited
a
remarkable
selectively
adsorb
even
in
presence
high
ionic
strengths.
Thus,
promising
adsorbent
emerging
contaminants
aquatic
environments.
