Processes,
Год журнала:
2025,
Номер
13(3), С. 790 - 790
Опубликована: Март 8, 2025
The
outstanding
properties
of
nanocellulose
have
led
to
a
wide
range
applications
in
packaging,
construction,
medicine,
electronics,
cosmetics,
environmental
solutions,
and
the
food
industry.
Specifically,
cellulose
nanocrystals
(CNC)
demonstrated
excellent
biocompatibility,
adaptable
surface
chemistry,
low
density,
optical
capabilities,
biodegradability,
renewability,
good
mechanical
properties.
However,
these
unique
characteristics
depend
on
raw
material,
processing,
post-treatment.
New
opportunities
CNC
production
are
being
explored
based
unconventional
resources
new,
environmentally
friendly
processes
replace
highly
polluting
inefficient
conventional
methods.
This
review
evaluated
current
methods
for
obtaining
from
green
processes,
focusing
organic
acids,
enzymes,
mechanical,
oxidative,
radiation-based
Sustainable Chemistry for the Environment,
Год журнала:
2024,
Номер
7, С. 100141 - 100141
Опубликована: Авг. 7, 2024
Water
contamination
is
a
global
concern
as
result
of
growing
industrialization
and
urbanization.
Dye
waste
produced
by
numerous
industries
pollutes
the
water,
so
dye-based
wastewater
major
alarm
for
animals,
human
health,
environment.
The
elimination
these
dye
contaminants
from
water
supplies
currently
critical
significant
due
to
dyes'
toxicity
on
humans,
livestock,
plants.
To
remove/degrade
dyes,
various
methods
have
been
investigated,
including
extraction,
absorption,
membrane
separation,
coagulation,
adsorption,
biological
treatment,
advanced
oxidation
process
(AOPs).
Graphitic
carbon
nitride
(g-C3N4),
captivating
formed
polymer,
has
transformed
an
intriguing
issue
in
AOP
science
because
its
metal-free
advantages
high
sensitivity
light.
Accordingly,
when
AOPs
are
joined
with
g-C3N4,
superb
degradation
occurred.
This
paper
overviewed
g-C3N4-based
discussed
removal.
synergist
effectiveness
mechanisms
behind
catalytic
activity
catalysts
broadly
discussed.
In
meantime,
impacts
pH,
temperature,
dissolved
oxygen,
initial
concentration,
catalyst
dosage,
scavengers
reaction
carried
out
illustrated.
Water,
Год журнала:
2024,
Номер
16(5), С. 673 - 673
Опубликована: Фев. 25, 2024
The
global
problem
of
microplastics
in
the
environment
is
“inspiring”
scientists
to
find
environmentally
friendly
and
economically
viable
methods
remove
these
pollutants
from
environment.
Advanced
oxidation
processes
are
among
most
promising
methods.
In
this
work,
potential
Fenton,
photo-Fenton,
Fenton-like
for
degradation
low-density
polyethylene
(LDPE),
polypropylene
(PP),
poly(vinyl
chloride)
(PVC)
water
suspensions
was
investigated.
influence
three
parameters
on
efficiency
process
tested:
pH
medium
(3–7),
mass
added
iron
(10–50
times
less
than
microplastics),
H2O2
(5–25
more
iron).
effectiveness
treatment
monitored
by
FTIR-ATR
spectroscopy.
After
60-min
treatments,
PP
microparticles
were
found
be
insensitive.
Fenton
PVC
photo-Fenton
LDPE
PVC,
changes
FTIR
spectra
related
observed.
cases,
optimized.
It
that
a
low
(3)
high
(optimal
values
1/12
1/10
respectively)
favored
all
three.
concentrations
(25
higher
iron),
while
significantly
lower
(11
15
treatment,
respectively),
suggesting
scavenging
activity
occurs.
Materials Chemistry and Physics,
Год журнала:
2024,
Номер
317, С. 129160 - 129160
Опубликована: Март 8, 2024
The
widespread
use
of
dyes
in
various
industries
has
led
to
alarming
levels
water
pollution,
posing
significant
environmental
and
health
risks.
This
study
presents
biochar
being
a
carbon-rich
source,
produced
from
Acacia
koa
pod
covers
been
used
as
sustainable
source
prepare
Ak/BC-Fe3O4
magnetic
nanocomposite,
subsequently
employed
for
Fenton-like
degradation
methylene
blue
(MB)
dye.
FESEM-EDS
revealed
that
the
synthesized
nanocomposite
morphology
spherical
nanoparticles
embedded
on
base
EDS
further
confirmed
synthesis
by
detecting
only
C,
O,
Fe.
is
mesoporous
with
pore
volume
0.03204
cm3/g
surface
area
7.11
m2/g
shown
BET
results.
XRD
substantiated
presence
an
amorphous
structure
ultra-small
crystallites
Fe3O4
nanoparticles.
FTIR
signified
specific
functional
groups
Fe–O
whereas,
XPS
showed
peaks
at
712.39
725.78
eV
indicated
coexistence
Fe2+
Fe3+.
superparamagnetic
saturation
magnetization
8.64
emu/g
having
remarkable
separation
capacity.
MB
dye
H2O2
first-order
reaction
removal
efficiency
ranging
between
82
96%
120
min
convenient
recycling
ability
7
cycles.
Hence,
this
underscores
outstanding
characteristics
Ak/BC–Fe3O4,
emphasizing
its
plant
biomass
promising
solution
address
pollution
challenges
associated
contamination.
Abstract
In
this
study,
a
simple
thermal
reduction
process
is
used
to
synthesize
rGO-Ca
2
Fe
O
5
(rGO-CFO)
nanocomposite,
with
the
morphological
and
optical
characteristics
of
CFO
nanomaterial
being
modified
by
rGO
incorporation.
The
interface
between
nanosheets
nanoparticles
facilitates
efficient
charge
separation
resulting
transfer
photogenerated
carriers
across
nanosheets,
demonstrated
from
photoluminescence
Mott-Schottky
tests.
Compared
(2.1
eV),
rGO-CFO
has
reduced
band
gap
energy
1.9
eV.
As
synthesized
nanocomposites
were
initially
optimized
utilized
for
photodegradation
organic
effluent
Methylene
blue
(MB).
An
addition
wt%
an
improved
efficiency
(97%)
compared
bare
(72%).
active
species
trapping
experiment
was
assess
MB
mechanism.
results
demonstrate
that
hydroxyl
radicals
holes
are
major
involved
in
photodegradation.
composition
(5rGO-CFO)
further
tested
degradation
Bisphenol-A
Tetracycline
(antibiotic).
Altogether,
these
investigations
show
highly
photocatalyst
can
be
remediate
emerging
contaminants
sunlight.
Materials Today Catalysis,
Год журнала:
2024,
Номер
5, С. 100052 - 100052
Опубликована: Май 22, 2024
This
review
delves
into
the
underlying
principles,
advantages,
challenges,
and
recent
developments
in
photoelectrocatalysis
(PEC)
processes
for
wastewater
treatment
green
hydrogen
production.
PEC
is
an
emerging
technique
that
holds
great
promise
addressing
two
critical
challenges
simultaneously,
namely,
degradation
of
industrial
pollutants
generation
clean
energy
form
gas.
In
years,
many
studies
have
explored
use
photoanodes
to
harness
solar
treatment.
These
facilitate
breakdown
contaminants,
while
cathode
concurrently
produces
hydrogen.
The
enables
production
both
water
gas
from
wastewater.
dual
benefit
makes
it
attractive
avenue
sustainable
generation.
process
capitalizes
on
constructive
interaction
between
electrochemical
reactions
photocatalysis.
Solar
efficiently
converted
electron-hole
pairs,
which
play
a
pivotal
role
water-splitting
occurring
at
electrode
surfaces.
Achieving
best
performance
involves
scrutiny
various
parameters,
including
catalyst
loading,
pH,
light
intensity,
electrolyte
composition.
photoelectrocatalytic
system
shows
commendable
stability
durability
during
extended
operation,
reinforcing
its
practical
applicability.
provides
comprehensive
overview
process,
materials,
optimization
strategies,
driving
efficiency.
Considering
potential
benefits
costs
larger
scale
underscores
significance
environmental
concerns
energy-related
issues
concurrently.
Therefore,
promising
pathway
toward
energy,
bridging
gap
stewardship
technological
advancement.
Catalysts,
Год журнала:
2024,
Номер
14(4), С. 267 - 267
Опубликована: Апрель 17, 2024
The
use
of
hydrogen
peroxide
(produced
in
situ
or
ex
situ)
as
the
main
agent
oxidative
processes
environmental
pollutant
removal
is
widely
studied.
degradation
water
pollutants,
such
dyes,
pharmaceuticals,
cosmetics,
petroleum
derivatives,
and
even
pathogens,
has
been
successfully
obtained
by
different
techniques.
This
review
gives
an
overview
more
recent
methods
developed
to
apply
mediated
H2O2
other
reactive
oxygen
species
(ROS)
catalysis,
with
particular
attention
strategies
(Fenton-like
Bio-Fenton,
photo-
electro-catalysis)
materials
employed.
A
wide
discussion
about
characteristics
specifically
studied
for
activation,
well
their
chemical
composition
morphology,
was
carried
out.
Moreover,
interesting
generation
enzymes
were
also
presented
efficiency
applicability
compared
Fenton
electro-Fenton
discussed
above.
Bio-Fenton
bi-enzymatic
ROS
seems
be
attractive
scalable,
although
not
yet
applied
full-scale
plants.
critical
feasibility,
criticalities,
perspectives
all
considered
completes
this
review.
Journal of Hazardous Materials,
Год журнала:
2024,
Номер
468, С. 133830 - 133830
Опубликована: Фев. 22, 2024
The
daunting
effects
of
persistent
organic
pollutants
on
humans,
animals,
and
the
environment
cannot
be
overemphasized.
Their
fate,
persistence,
long-range
transport,
bioavailability
have
made
them
an
environmental
stressor
concern
which
has
attracted
interest
research
community.
Concerted
efforts
been
by
relevant
organizations
utilizing
legislative
laws
to
ban
their
production
get
rid
completely
for
sake
public
health.
However,
they
remained
refractive
in
different
compartments
environment.
is
majorly
a
function
anthropogenic
activities.
Landfilling
incineration
are
among
earliest
classical
means
remediation
waste;
however,
not
sustainable
due
seepage
contaminants
landfills,
release
toxic
gases
into
atmosphere
energy
requirements
during
incineration.
Other
advanced
waste
destruction
technologies
explored
degradation
these
recalcitrant
pollutants;
although,
some
efficient,
but
limited
high
amounts
consumption,
use
solvents
hazardous
chemicals,
capital
operational
cost,
lack
trust.
Thus,
this
study
systematically
reviewed
contaminant
technologies,
efficiency,
feasibility.
Finally,
based
techno-economic
feasibility,
non-invasiveness,
friendliness;
radiation
technology
can
considered
viable
alternative
all
matrices
at
bench-,
pilot-,
industrial-scale.
