International Journal of Environmental & Analytical Chemistry,
Год журнала:
2024,
Номер
unknown, С. 1 - 17
Опубликована: Ноя. 26, 2024
This
study
reports
the
designing
of
comb-type
polyethylene
glycol
(PEG)-functionalised
poly
(3-hydroxybutyrate)-@Titanium
oxide
(PHB-comb-PEG@TiO2)
through
reversible
addition-fragmentation
chain
transfer
(RAFT)
polymerisation
approach
for
first
time
and
successfully
used
as
a
potential
candidate
safranin-O
(Saf-O)
removal
from
water.
The
synthesised
polymeric
material
was
characterised
by
different
techniques
to
examine
surface
morphology,
elemental
analysis,
functionality,
chemical
structure
prepared
SEM,
EDX,
FTIR,
1
h
NMR.
Different
parameters
such
pH,
adsorbent
dose,
temperature,
concentration,
equilibrium
were
optimised
during
this
enhance
adsorption
performance.
mechanism
pattern
kinetic
best
defined
Langmuir
pseudo-second-order
kinetics
with
maximum
capacity
344.83
mg/g.
A
linear
concentration
range
(10–150
μg/L)
obtained
satisfactory
low
limit
detection
(LOD)
quantification
(LOQ)
achieved
0.43
1.4
μg/L,
respectively.
developed
utilised
Saf-O
an
aqueous
medium.
results
suggest
that
designed
could
be
in
terms
its
reusability,
simplicity,
high
capacity,
cost-effectiveness,
excellent
range,
fast
kinetics.
International Journal of Environmental & Analytical Chemistry,
Год журнала:
2024,
Номер
unknown, С. 1 - 18
Опубликована: Авг. 8, 2024
A
nanocomposite
adsorbent
of
cross-linked
chitosan-adipic/zirconia
nanoparticles
(CHI-ADI/ZNPs)
was
successfully
formed
through
the
modifying
a
naturally
occurring
polymer
(CHI)
with
nanoscale
material
(zirconia,
ZrO2),
which
subsequently
subjected
to
an
ionic
cross-linking
technique
facilitated
by
adipic
(ADI).
The
physicochemical
properties
this
innovative
have
been
thoroughly
investigated
utilising
variety
techniques,
such
as
CHN,
XRD,
FTIR,
FESEM-EDX,
and
BET.
Using
response
surface
methodology,
capacity
CHI-ADI/ZNPs
remove
organic
dye
(Eosin
Y,
EY)
from
aqueous
system
investigated,
adsorption-influencing
parameters
including
dosage
(0.02–0.08
g),
removal
time
(10–90
min),
pH
solution
(4–10).
Langmuir
Temkin
isotherm,
equilibrium
behaviour
EY
determined
is
well
illustrated.
adsorption
kinetics
data
were
aptly
characterised
model
pseudo-first-order.
At
199.84
mg/g,
exhibit
remarkably
capacity.
efficient
onto
likely
assigned
H-bond
interactions,
n-π
stacking,
positively
charged
anions.
findings
research
illustrate
exceptional
capabilities
in
context
eliminating
synthetic
anionic
dyes
wastewater.
Scientific Reports,
Год журнала:
2025,
Номер
15(1)
Опубликована: Янв. 26, 2025
The
supercritical
antisolvent
(SAS)
method
can
effectively
improve
the
bioavailability
of
poorly
water-soluble
drugs.
However,
current
equipment
and
processes
were
not
fully
developed,
making
industrialization
difficult
to
achieve.
Therefore,
an
externally
adjustable
annular
gap
nozzle
its
supporting
designed.
Curcumin
was
used
as
a
model
drug,
ethanol
solvent,
carbon
dioxide
(SC-CO2)
antisolvent.
Building
on
single-factor
experiments,
Box-Behnken
Design-Response
Surface
Methodology
(BBD-RSM)
employed
systematically
investigate
effects
four
process
parameters—crystallizer
pressure
(12–16
MPa),
crystallizer
temperature
(313–323
K),
solution
concentration
(1–2
mg/mL),
CO2/solution
flow
rate
ratio
(133–173
g/g)—on
morphology
particle
size
curcumin
particles.
Using
scanning
electron
microscopy
(SEM)
dynamic
light
scattering
(DLS)
analyses,
morphologies
mean
diameter
ranges
examined.
To
look
into
how
SAS
affects
TML's
chemical
physical
characteristics,
X-ray
diffraction
analysis
(XRD)
Fourier-transform
infrared
spectroscopy
(FT-IR)
further
performed.
Experimental
results
show
that,
had
greatest
effect
size,
followed
by
concentration,
while
least
influence.
optimum
conditions
are
operational
set
with
15
MPa,
320
K,
1.2
mg/mL,
134
g/g,
resulting
in
submicron
particles
average
808
nm
being
obtained.
This
study
demonstrated
feasibility
associated
process,
showcasing
significant
potential
for
reducing
enhancing
