ACS Omega,
Journal Year:
2023,
Volume and Issue:
8(43), P. 40848 - 40863
Published: Oct. 16, 2023
In
an
attempt
to
examine
novel
adsorbents
in
accessing
ideal
adsorption
system,
this
study
aimed
help
understand
the
main
and
secondary
characteristics
of
a
Moroccan
natural
clay.
X-ray
fluorescence,
infrared,
scanning
electron
microscopy
with
energy-dispersive
spectroscopy
analysis
(SEM-EDX)
were
used
for
identification.
The
findings
demonstrate
that
Clay
is
composed
mixture
quartz,
calcite,
magnetite,
Rutile
very
high
proportions.
SEM
revealed
presence
clay
grains
fine
particles
irregularly
contoured
sticks.
results
semiquantitative
detection
by
EDX
also
reveal
certain
mineral
species
(Si,
Al,
Mg,
Fe,
K,
Cl,
S,
Ca,
Na).
exploited
kinetic
technique
was
achieved
using
two
different
models:
first-
second-order
rate
laws.
Commensurate
obtained
results,
2-sec
order
model
better
described
dye
MB
onto
confirmed
process
followed
Langmuir
coefficient
correlation
which
are
close
1.
sequel,
DFT
HOMO
LUMO
surfaces
methylene
blue
mostly
distributed
on
all
parts,
reflecting
possible
strong
interactions
quantum
descriptors
investigated
identify
most
nucleophilic
electrophilic
centers
can
be
suggest
suitable
mechanism
values
enthalpy
ΔH0
entropy
ΔS0
activation
-15.88
kJ
mol-1
-0.021
J
K-1,
respectively,
show
nature
exothermic
distribution
molecules
adsorbent
increases
respect
solution
so
negative
ΔG0
(from
-9.
62
-8.99
mol-1)
indicate
spontaneous.
Sustainability,
Journal Year:
2023,
Volume and Issue:
15(13), P. 10364 - 10364
Published: June 30, 2023
Methylene
blue
(MB)
adsorption
was
performed
on
a
natural
material
powder
of
Cynara
scolymus
as
new
inexpensive
adsorbent
identified
by
Cs.
To
analyze
the
Cs
material,
FTIR,
SEM,
isoelectric
point
(pHpzc)
analysis,
TGA,
and
DRX
were
used.
The
maximum
experimental
capacity
203.333,
192.187,
179.380
mg•g−1
at
298,
303,
313
K,
respectively.
correlation
coefficients
(R2)
average
percentage
errors
APE
(%)
values
for
kinetic
isotherms
models
indicated
that
kinetics
followed
pseudo-nth
order
model
traditional
isotherm
Redlich–Peterson
(R–P)
correctly
described
data
obtained
steric,
energetic,
thermodynamic
characteristics
most
relevant
advanced
(double-energy
single-layer
(AM
2))
analyzed
in
detail.
number
active
sites
first
receptors
(n1)
determined
to
be
0.129,
0.610,
6.833,
whereas
second
(n2)
1.444,
1.675,
2.036
This
presence
both
multi–docking
multimolecular
modes
style
MB
ions
(n1),
while
only
mode
(n2).
Thermodynamic
demonstrated
onto
is
spontaneous
feasible.
Chemical Physics Impact,
Journal Year:
2023,
Volume and Issue:
8, P. 100446 - 100446
Published: Dec. 26, 2023
The
present
research
work
reports
the
preparation
of
Hyphaene
thebaica
derived-biochar
(HTBC)
and
its
applicability
as
eco-friendly
low-cost
adsorbent
for
removal
methyl
orange
(MO)
dye.
main
physicochemical
characteristics
HTBC
including
morphology,
crystallinity
chemical
function
groups
were
determined
through
scanning
electron
microscopy
(SEM),
energy
dispersion
spectroscopy
(EDS),
powder
X-ray
diffraction
(XRD)
Fourier
transform
infrared
(FTIR).
results
showed
that
was
found
to
be
constituted
by
heterogeneous
surface
with
mesoporous
having
a
area
33.38
m2/g
pore
diameter
23.53
nm,
carboxylic
amine
functional
groups.
Adsorption
experiments
conducted
using
batch
mode,
varying
key
adsorption
parameters
such
contact
time,
solution
pH,
dosage
concentration.
isotherm
modelling
revealed
Langmuir
model
(higher
R2
lower
χ2)
provided
better
fit
MO
onto
HTBC,
while
kinetics
followed
pseudo-second-order
kinetic
model.
Under
optimized
conditions
(pH
2,
dose
0.03
g,
initial
dye
concentration
100
mg/L,
313
K,
270
rpm),
maximum
monolayer
capacity
264.922
mg/g.
According
thermodynamic
parameters,
it
can
deduced
on
exothermic
spontaneous.
mechanism
attributed
various
interactions,
electrostatic
attraction,
H-bonding,
π-π
interaction.
In
light
these
findings,
biochar
from
shells
considered
cost-effective
biodegradable
significant
potential
treatment
water
contaminated
anionic
dyes.
