Chemical Engineering Communications,
Journal Year:
2024,
Volume and Issue:
unknown, P. 1 - 18
Published: Nov. 18, 2024
This
study
was
performed
to
evaluate
the
adsorptive
properties
of
bentonite.
Natural
bentonite
found
adsorb
considerable
amounts
Salicylic
acid
(SA)
after
modification
by
hexadecyltrimethylammonium
bromide
(HDTMA).
Batch
studies
investigated
modified
natural
(organobentonite).
The
characterization
results
show
increase
in
d001
spacing
from
1.13
1.53
nm
for
raw
and
organobentonite,
respectively.
FTIR
analysis
indicates
asymmetric
vs.
(CH2)
symmetric
stretching
modes
clay
loaded
with
surfactant
molecules
are
2919
2845
cm−1,
We
investigate
parameters
such
as
contact
time,
pH,
temperature,
initial
concentration.
Desorption
regeneration
were
also
studied.
kinetic
shows
that
adsorption
equilibrium
salicylic
onto
organoclay
reached
120
min
fits
well
a
pseudo-second-order
model
contribution
intraparticular
diffusion.
In
addition,
adjustment
isothermal
models
indicated
Langmuir-Freundlich
best
fit
isotherms
data
unmodified
Langmuir
maximum
capacity
organobentonite
is
128
mg
g−1
at
25
°C.
According
statistical
physics
model,
SA
could
be
adsorbed
on
surface
non-parallel
orientation.
desorption-regeneration
investigation
revealed
material
successfully
reused
three
cycles
adsorption.
Mechanistic
sorption
have
highlighted
several
mechanisms:
hydrogen
bonding,
electrostatic
attraction,
hydrophobic
interaction.
Journal of Hazardous Materials,
Journal Year:
2023,
Volume and Issue:
465, P. 133143 - 133143
Published: Dec. 1, 2023
Harnessing
coastal
biowaste
for
dual
valorization
in
water
treatment
and
biofuel
production
holds
paramount
importance
sustainability
resource
challenges.
This
study
investigated
the
potential
of
engineered
composite
(CABC)
derived
from
biowaste-based
materials
tetracycline
(TC)
removal
biomethane
production.
High-yield
calcium
carbonate
(CaCO
Environmental Challenges,
Journal Year:
2023,
Volume and Issue:
14, P. 100829 - 100829
Published: Dec. 30, 2023
Utilizing
Bagasse
Fly
Ash
(BFA)
as
an
adsorbent,
a
byproduct
from
the
sugar
industry,
proved
effective
in
removing
mixture
of
Malachite
Green
and
Methylene
Blue
dyes
aqueous
solutions.
To
enhance
its
efficacy,
fly
ash
underwent
chemical
modification
detailed
characterization
using
FTIR,
XRD,
SEM,
TGA
analyses.
Subsequently,
adsorption
studies
were
conducted
to
optimize
critical
parameters—initial
dye
concentration,
contact
time,
pH
levels—employing
Mixed-Level
Factorial
design
pinpoint
most
favorable
conditions
for
efficient
removal.
The
modified
resulted
maximum
capacity
18.75
mg/g
(71.5%)
15.5
(67.2%)
at
initial
concentration
100
mg/L,
9.6,
time
51.5
min.
Analysis
sorption
data
involved
rigorous
application
both
Langmuir
Freundlich
isotherm
models,
revealing
strong
fit
linear
representation
dyes.
Specifically,
R2
values
0.97
0.93
observed
Green,
while
notably
higher
0.99
0.96
obtained
Blue,
affirming
excellent
model-data
agreement.
Additionally,
kinetic
study
revealed
that
process
(MB
MG)
followed
pseudo-second-order
model
(R2
>
0.99),
indicating
chemisorption
dominant
mechanism
providing
valuable
insights
into
dynamic
behavior
process.
