Heliyon,
Journal Year:
2025,
Volume and Issue:
11(2), P. e41720 - e41720
Published: Jan. 1, 2025
This
study
focuses
on
developing
biochar-based
adsorbents
with
high
adsorption
capacity
and
rapid
rates
for
removing
boron
from
aqueous
solutions.
Hydroxy-enriched
biochar
composites
(BC
(carboxylated
biochar),
BC-PDA
(polydopamine
loaded
MBC-PDA
magnetic
BC-AlOOH
(AlOOH
BC-ZnCl2
(biochar
modified
by
ZnCl2))
were
synthesized
specifically
to
utilize
the
superior
of
biochar.
All
using
straightforward
experimental
techniques
date
palm
cellulosic
fibers
as
promising
lignocellulose
feedstock
subjected
various
characterization
methods.
Boron
kinetics,
isotherms,
mechanism,
adsorbent
recycling
investigated
batch
experiments.
The
results
showed
values
14,
20.5,
21.5,
43.2,
44.2
mg/g
BC,
BC-PDA,
MBC-PDA,
BC-AlOOH,
at
360
min.
prominent
was
related
abundant
existence
-OH
functional
groups
BC
surface
abundance
pores
widely
distributed
throughout
surface,
facilitating
chemical
physical
boron.
exhibited
a
promoted
ease
recovery
reusability.
Scientific Reports,
Journal Year:
2025,
Volume and Issue:
15(1)
Published: Jan. 20, 2025
A
novel
adsorbent
ZnAl–LDHs/SiO2
(ZA/SiO2)
was
prepared
by
blending
urea
mixture
of
ZnSO4
and
Al2(SO4)3
while
using
SiO2
as
a
support
form.
The
adsorption
properties
ZA/SiO2
for
the
removal
toxic
metal
ions
(Cu(II)
Cr(VI))
from
water
were
evaluated.
By
batch
experiment
method
to
investigate
Cu(II)
Cr(VI)
solution
treatment
effect.
sorption
kinetics
curves
on
L-shaped.
What's
more,
solid
concentration
effect
found
in
process
kinetics.
Langmuir
Freundlich
isotherm
models
used
analyze
data.
results
showed
that
conforms
models.
However,
capacity
compounds
is
greatly
improved.
158
mg·g−1
176
mg·g−1,
which
3.6
1.8
times
ZnAl-LDHs
(ZA),
respectively.
Density
functional
theory
(DFT)
utilized
analysis
intrinsic
mechanism
specific
pathways.
primary
removing
mainly
included
intercalation
Cr2O72−
exchange
between
OH−,
excluding
Cr(OH)3
precipitation.
Regarding
eliminating
water,
it
involves
isomorphic
substitution
predominant
process,
except
formation
Cu(OH)2
precipitates.
