Heliyon,
Journal Year:
2023,
Volume and Issue:
9(11), P. e21423 - e21423
Published: Oct. 30, 2023
Fabrication
of
heterojunction
and
surface
defective
engineering,
through
the
formation
oxygen
vacancies,
are
among
various
photocatalytic
enhancement
techniques.
A
combination
these
techniques
has
prospect
enhancing
activities
improved
light
absorption
capabilities
charge
separation
process
photocatalysts.
In
this
study,
a
black
titanium
oxide-zinc
oxide
(BTiO2-ZnO)
nanocomposite
was
synthesized
using
conventional
sol-gel
approach,
coupled
with
aluminum
foil-assisted
NaBH4
reduction.
The
structure,
morphology,
properties,
optical
characteristics
material
were
studied
Fourier
transform
infrared
spectroscopy
(FTIR),
X-ray
diffraction
(XRD),
UV-vis
spectra,
scanning
electron
microscope
(SEM),
Energy-dispersive
(EDS),
transmission
(TEM).
XRD
confirmed
successful
BTiO2-ZnO
heterostructure,
while
SEM
revealed
structural
morphology
as
pseudo-spherical
slight
agglomeration.
found
to
be
more
efficient
than
BTiO2
BZnO
for
removal
tetracycline
degradation
efficiencies
63,
58,
56
%
respectively.
effects
parameters
such
amount
photocatalyst,
pollutant's
concentration,
initial
solution
pH
on
study
systematically
explored.
results
confirm
that
heterostructure
from
could
offer
facile
route
improving
catalytic
tetracycline.
Therefore,
offers
novel
perspective
design
metal
photocatalyst
systems
rely
integration
defect
engineering
organic
contaminants.
Environmental Chemistry Letters,
Journal Year:
2023,
Volume and Issue:
21(4), P. 2129 - 2169
Published: April 4, 2023
Abstract
Microplastic
pollution
is
becoming
a
major
issue
for
human
health
due
to
the
recent
discovery
of
microplastics
in
most
ecosystems.
Here,
we
review
sources,
formation,
occurrence,
toxicity
and
remediation
methods
microplastics.
We
distinguish
ocean-based
land-based
sources
Microplastics
have
been
found
biological
samples
such
as
faeces,
sputum,
saliva,
blood
placenta.
Cancer,
intestinal,
pulmonary,
cardiovascular,
infectious
inflammatory
diseases
are
induced
or
mediated
by
exposure
during
pregnancy
maternal
period
also
discussed.
Remediation
include
coagulation,
membrane
bioreactors,
sand
filtration,
adsorption,
photocatalytic
degradation,
electrocoagulation
magnetic
separation.
Control
strategies
comprise
reducing
plastic
usage,
behavioural
change,
using
biodegradable
plastics.
Global
production
has
risen
dramatically
over
past
70
years
reach
359
million
tonnes.
China
world's
top
producer,
contributing
17.5%
global
production,
while
Turkey
generates
waste
Mediterranean
region,
at
144
tonnes
per
day.
75%
marine
waste,
with
responsible
80–90%
pollution,
account
only
10–20%.
induce
toxic
effects
on
humans
animals,
cytotoxicity,
immune
response,
oxidative
stress,
barrier
attributes,
genotoxicity,
even
minimal
dosages
10
μg/mL.
Ingestion
animals
results
alterations
gastrointestinal
tract
physiology,
system
depression,
differential
gene
expression,
growth
inhibition.
Furthermore,
bioaccumulation
tissues
aquatic
organisms
can
adverse
ecosystem,
potential
transmission
birds.
Changing
individual
behaviours
governmental
actions,
implementing
bans,
taxes,
pricing
carrier
bags,
significantly
reduced
consumption
8–85%
various
countries
worldwide.
The
microplastic
minimisation
approach
follows
an
upside-down
pyramid,
starting
prevention,
followed
reducing,
reusing,
recycling,
recovering,
ending
disposal
least
preferable
option.
Environmental Chemistry Letters,
Journal Year:
2023,
Volume and Issue:
21(3), P. 1419 - 1476
Published: Feb. 24, 2023
Abstract
Climate
change
issues
are
calling
for
advanced
methods
to
produce
materials
and
fuels
in
a
carbon–neutral
circular
way.
For
instance,
biomass
pyrolysis
has
been
intensely
investigated
during
the
last
years.
Here
we
review
of
algal
lignocellulosic
with
focus
on
products
mechanisms,
oil
upgrading,
combining
anaerobic
digestion,
economy,
life
cycle
assessment.
Products
include
oil,
gas,
biochar.
Upgrading
techniques
comprise
hot
vapor
filtration,
solvent
addition,
emulsification,
esterification
transesterification,
hydrotreatment,
steam
reforming,
use
supercritical
fluids.
We
examined
economic
viability
terms
profitability,
internal
rate
return,
return
investment,
carbon
removal
service,
product
pricing,
net
present
value.
also
reviewed
20
recent
studies
found
that
method
highly
influenced
yield,
ranging
from
9.07
40.59%
10.1
41.25%
biochar,
11.93
28.16%
syngas.
Feedstock
type,
pyrolytic
temperature,
heating
rate,
reaction
retention
time
were
main
factors
controlling
distribution
products.
Pyrolysis
mechanisms
bond
breaking,
cracking,
polymerization
re-polymerization,
fragmentation.
Biochar
residual
forestry
could
sequester
2.74
tons
dioxide
equivalent
per
ton
biochar
when
applied
soil
thus
potential
remove
0.2–2.75
gigatons
atmospheric
annually.
The
generation
bio-oil
process
is
estimated
be
economically
feasible.
npj Clean Water,
Journal Year:
2023,
Volume and Issue:
6(1)
Published: April 25, 2023
Abstract
Degradation
of
organic
contaminants
into
less
toxic
substances
is
the
best
option
to
remove
these
compounds
rather
than
using
conventional
techniques.
The
sulfate
radical-based-advanced
oxidation
process
an
effective
strategy
that
degrades
by
activating
peroxymonosulfate
(PMS).
Such
a
generates
singlet
oxygen
(
1
O
2
),
hydroxyl
$$^
\bullet
\!{{{\mathrm{OH}}}}$$
∙OH
and
$${{{\mathrm{SO}}}}_4^{
\bullet\!
-
}$$
xmlns:mml="http://www.w3.org/1998/Math/MathML">SO4∙−
)
radicals.
\!-
distinguished
its
high
selectivity
activity
toward
degradation
contaminates
compared
other
Various
catalysts
are
employed
in
PMS
activation
including
layered
doubled
hydroxides
(LDHs),
which
characterized
their
facile
synthesis
catalytic
activity.
This
review
article
first
attempt
compile
recent
progress
common
pollutants
aromatic
compounds,
pharmaceutical
residues,
dyes
via
LDH-based
catalysts.
pathways,
reaction
parameters’
influence,
stability
LDHs,
comparisons
between
different
investigated
this
work.
Scientific Reports,
Journal Year:
2022,
Volume and Issue:
12(1)
Published: Sept. 15, 2022
Abstract
The
jeopardy
of
the
synthetic
dyes
effluents
on
human
health
and
environment
has
swiftly
aggravated,
threatening
survival.
Hence,
sustained
studies
have
figured
out
most
acceptable
way
to
eliminate
this
poisonous
contaminant.
Thereby,
our
investigation
aimed
fabricate
montmorillonite/magnetic
NiFe
2
O
4
@amine-functionalized
chitosan
(MMT-mAmCs)
composite
as
a
promising
green
adsorbent
remove
cationic
methylene
blue
(MB)
crystal
violet
(CV)
from
wastewater
in
neutral
conditions.
Interestingly,
MMT-mAmCs
carries
high
negative
charges
at
wide
pH
range
11
clarified
zeta
potential
measurements,
asserting
its
suitability
adsorb
contaminants.
In
addition,
experimental
study
confirmed
that
optimum
both
MB
CV
was
7,
inferring
ability
simple
process
Furthermore,
ferromagnetic
behavior
is
additional
merit
provides
facile,
fast,
flawless
separation.
Notably,
as-fabricated
revealed
an
auspicious
adsorbability
towards
adsorptive
removal
CV,
since
maximum
adsorption
capacity
were
137
118
mg/g,
respectively.
Moreover,
isotherm
kinetic
investigatins
depicted
fitted
Langmuir
Pseudo
2nd
order
models,
Besides,
advanced
preserved
satisfactory
characteristics
with
maximal
efficacy
exceeding
87%
after
reuse
for
ten
consecutive
cycles.
More
importantly,
efficiently
adsorbed
real
agricultural
water,
Nile
river
water
samples
medium,
reflecting
potentiality
be
superb
reusable
candidate
pollutants
their
aquatic
media.
OpenNano,
Journal Year:
2022,
Volume and Issue:
8, P. 100082 - 100082
Published: Sept. 10, 2022
Zinc
oxide
nanoparticles
(ZnO
NPs)
have
been
the
subject
of
extensive
research
due
to
their
peculiar
physical
and
chemical
properties.
Numerous
studies
used
NPs
as
photocatalytic
antibacterial
agents
because
high
surface-to-volume
ratio,
miniature
size,
antimicrobial
activity,
semiconducting
However,
some
aforementioned
features
also
exhibit
limitations
in
ZnO
NPs.
It
seems
possible
circumvent
these
increase
utilization
by
doping
them
with
silver
selenium
elements.
Therefore,
a
thorough
review
use
or
doped
for
objectives
was
conducted
this
study.
Additionally,
emphasis
placed
on
synthesis
using
principally
sol-gel,
mechanochemical,
green
techniques.
The
results
showed
that
considerably
improved
intrinsic
qualities
ROS
production
capability,
bandgap,
stability,
etc.,
which
consequently
features.
As
result,
they
excelled
at
photo-catalytic
breakdown
organic
pollutants
treatment
bacterial
illnesses.
