ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(42), С. 57915 - 57926
Опубликована: Окт. 10, 2024
Upcoming
regulations
aim
to
ban
per-
and
polyfluoroalkyl
substances
(PFAS),
including
commercial
polymeric
PFAS,
or
fluoropolymers,
such
as
poly(tetrafluoroethylene)
(PTFE)
poly(vinylidene
fluoride)
(PVDF),
due
their
environmental
toxicological
impacts.
However,
fluoropolymers
also
provide
crucial
properties
for
clean
energy
transitions,
regulation
may
hinder
further
technological
advancements.
Therefore,
a
facile
one-pot
recycling–upcycling
strategy
using
inexpensive
biomass,
cellulose
nanocrystals
(CNCs),
absorbents
cocomponents
fluoro-functionalized
composites
could
align
with
global
sustainability
goals
demands.
Herein,
we
present
closed-loop
CNC-in-solvent
(CiS)
processing
system,
which
involves
stirring
CNCs
in
only
low-polarity
solvents
like
toluene
(CiS-T).
Our
study
reveals
that
CiS-T
is
two-step
process
where
the
CNC–solvent
interaction
exposes
CNCs'
reducing
end
aldehyde
protons
solvent
polarity
promotes
H–F
bond
formation.
The
used
was
recollected
reused.
Additionally,
demonstrate
practical
application
of
PTFE–
PVDF–CNC
hybrids,
byproducts
process,
performance-enhancing
agents
green-energy-harvesting
devices
triboelectric
nanogenerators.
findings
not
offer
sustainable
method
overcome
challenges
from
against
but
insights
into
developing
an
efficient,
solvent-mediated
CNC
functionalization
addresses
forthcoming
key
industries.
Dutse Journal of Pure and Applied Sciences,
Год журнала:
2024,
Номер
9(4a), С. 236 - 248
Опубликована: Янв. 12, 2024
Pharmaceutical
wastewater
is
a
major
source
of
environmental
contamination,
often
containing
toxic
metals
that
pose
significant
threats
to
ecosystems
and
public
health.
This
study
explores
the
potential
magnetite/zinc
oxide
(Fe3O4/ZnO)
nanocomposites
prepared
using
sol-gel
method
for
removal
lead,
cadmium,
copper
ions
from
pharmaceutical
wastewater.
The
nanocomposite
was
characterized
X-ray
diffraction
(XRD),
High-resolution
scanning
electron
microscopy
(HRSEM)/energy
dispersive
spectroscopy
(EDS)
Fourier
transmission
infrared
(FTIR).
XRD
analysis
identified
2θ
(theta),
31.7º,
34.4º,
36.2º,
47.5º,
56.6º,
62.8º,
66.3º,
67.9º
which
correspond
crystal
planes
(100),
(002),
(101),
(102),
(110),
(103),
(200),
(112),
respectively.
peaks
associated
with
Fe3O4
at
18.02º,
29.4º,
43.3º,
related
(111),
(220),
(400),
respectively
phase.
HRSEM
image
exhibited
spherical-shaped
structures
Fe3O4/ZnO,
some
irregular
shapes.
effects
contact
time,
dosage
temperature
on
percentage
metal
were
studied.
Freundlich
Langmuir
isotherm
constants
correlation
coefficients
determined
equilibrium
process
better
described
by
isotherm.
adsorption
followed
second
order
kinetics
thermodynamic
parameters
showed
involved
spontaneous.
These
findings
contribute
advancement
environmentally
friendly
technologies
industry
broader
field
remediation.
Antibiotics
are
used
for
the
well-being
of
human
beings
and
other
animals.
Detectable
levels
antibiotics
can
be
found
in
pharmaceutical,
municipal,
animal
effluents.
Therefore,
treatment
antibiotic
contaminated
water
is
great
concern.
In
this
study,
we
fabricated
a
sustainable
aminated/TEMPO
cellulose
nanofiber
(Am/TEMPO-CNF)
aerogel
to
remove
oxytetracycline
(OTC)
chloramphenicol
(CAP)
from
synthetic
wastewater.
The
prepared
was
characterized
using
different
analytical
techniques
such
as
elemental
analysis,
FTIR,
TGA,
SEM-EDS,
N2
adsorption–desorption
isotherms.
characterization
confirmed
presence
interaction
quaternary
amine
-[NR3]+
-COOH
groups
on
Am/TEMPO-CNF
with
OTC
CAP,
which
validates
successful
modification
Am/TEMPO-CNF.
adsorption
process
pollutants
examined
function
solution
pH,
concentrations,
reaction
time,
temperatures.
maximum
capacity
153.13
150.15
mg/g
respectively.
pseudo-second
order
(PSO-2)
well
fitted
both
confirming
removal
via
chemisorption.
Hydrogen
bonding
electrostatic
attraction
have
been
postulated
key
factors
facilitating
CAP
according
spectroscopic
studies.
Energetically,
spontaneous
endothermic
pollutants.
conclusion,
efficient
rate
excellent
reusability
indicate
strong
potential
adsorbent
antibiotics’
removal.
Separations,
Год журнала:
2023,
Номер
10(9), С. 466 - 466
Опубликована: Авг. 24, 2023
The
green
preparation
of
metal
oxide
nanoparticles
is
an
environmentally
friendly
method,
which
could
reduce
the
use
toxic
solvents
and
their
impact
on
environment.
purpose
this
study
to
investigate
synthesis
zinc
(ZnO)
using
extracts
Hibiscus
cannabinus
leaves
evaluate
potential
applications
in
environmental
remediation.
In
work,
ZnO
were
successfully
prepared
thoroughly
characterized
UV–vis,
Fourier
transform
infrared
analysis
(FTIR),
X-ray
diffraction
(XRD),
transmission
electron
microscope
(TEM)
analysis,
scanning
(SEM)
with
energy
dispersive
x-ray
(EDAX).
As
a
result,
synthesized
showed
good
adsorption
capacity
for
Congo
red
(CR),
satisfactory
antioxidant
antibacterial
activities.
They
exhibited
removal
abilities
CR
aqueous
solutions.
With
conditions
optimized,
kinetics
isotherms
fitted
pseudo-second-order
model
Langmuir
model.
also
effectively
scavenge
2-2-diphenyl-1-picrylhydrazyl
(DPPH)
2,2′-azino-di(3-ethylbenzthiazoline
sulphonate)
(ABTS)
radicals,
appeared
inhibit
growth
Escherichia
coli
Staphylococcus
aureus
bacteria.
Based
identified
capacity,
demonstrated
be
used
dyeing
wastewater
further
purification
water
due
activity
activity.
