Scientific Reports,
Journal Year:
2024,
Volume and Issue:
14(1)
Published: Dec. 30, 2024
This
paper
presented
the
preparation,
characterization,
and
adsorption
properties
of
Brazil
nut
shell
activated
carbon
for
catechol
removal
from
aqueous
solutions.
The
equilibrium
molecules
on
this
was
experimentally
quantified
at
pH
6
temperatures
ranging
25
to
55
°C,
°C
10.
These
results
were
utilized
elucidate
role
surface
functionalities
through
statistical
physics
calculations.
All
these
experimental
isotherms
fitted
interpreted
via
a
monolayer
model
with
one
energy,
which
chosen
as
optimal
model.
Model
physicochemical
parameters,
may
be
categorized
stereographic
parameters
such
maximum
adsorbed
quantity
(Q
ACS Omega,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 11, 2025
To
address
the
low
fluoride
(F–)
adsorption
capacity
of
red
mud
(RM)-based
adsorbents,
a
novel
Mn-coated
RM
adsorbent
(Mn-RM)
was
prepared
by
Mn
loading
from
mud.
Mn-RM
features
3D
heteropolyhedral
structure,
which
provides
abundant
functional
groups
for
F–
adsorption.
The
maximum
equilibrium
(qmax)
is
141.83
mg/g
at
298
K
and
pH
3.0,
among
highest
reported
RM-based
adsorbents.
kinetics
isotherms
follow
pseudo-second-order
Langmuir
models,
respectively,
suggesting
monolayer
involving
electrostatic
attraction,
pore
filling,
ion
exchange-disproportion
reaction,
metal
complexation.
demonstrates
excellent
recyclability,
maintaining
an
86.69%
removal
rate
after
five
reuse
cycles.
Competitive
experiments
reveal
that
PO43–
significantly
inhibits
adsorption,
while
SO42–,
NO3–,
Cl–
have
minimal
effects.
efficiency
fluorinated
wastewater
AlF3
industrial
facility
coal-fired
power
plant
are
99.54%
(56.26
mg/g)
99.16%
(44.38
mg/g),
respectively.
Moreover,
concentrations
in
both
wastewaters
below
0.2
mg/L,
meeting
drinking
water
quality
guidelines
China
World
Health
Organization
(WHO).
