Materials,
Год журнала:
2024,
Номер
18(1), С. 39 - 39
Опубликована: Дек. 25, 2024
This
article
presents
a
comprehensive
examination
of
the
combined
catalytic
conversion
technology
for
nitrogen
oxides
(NOx)
and
volatile
organic
compounds
(VOCs),
which
are
primary
factors
contributing
to
formation
photochemical
smog,
ozone,
PM2.5.
These
pollutants
present
significant
threat
air
quality
human
health.
The
examines
reaction
mechanism
interaction
between
photocatalytic
NH3-SCR
oxidation
technology,
highlighting
limitations
existing
techniques,
including
catalyst
deactivation,
selectivity
issues,
regeneration
methods,
environmental
impacts
catalysts.
Furthermore,
anticipates
prospective
avenues
research,
underscoring
necessity
development
bifunctional
catalysts
capable
concurrently
transforming
NOx
VOCs
across
broad
temperature
spectrum.
review
encompasses
multitude
integrated
selective
reduction
(SCR),
oxidation,
low-temperature
plasma
biological
purification
technology.
highlights
further
research
into
design
principles,
structure–activity
relationships,
performance
evaluations
in
real
industrial
environments.
is
required
develop
more
efficient,
economical,
environmentally
friendly
waste
gas
treatment
technologies.
concludes
by
outlining
importance
collaborative
management
strategies
VOC
emissions
potential
achieving
these
goals.
Journal of Geophysical Research Atmospheres,
Год журнала:
2025,
Номер
130(4)
Опубликована: Фев. 24, 2025
Abstract
Lakes
near
developed
cities
often
experience
algal
blooms
due
to
eutrophication,
leading
odor
and
biogenic
emissions
that
can
potentially
interfere
with
the
formation
of
air
pollutants
such
as
O
3
around
these
lakes.
However,
impact
its
pathways
remain
poorly
understood.
This
study
investigates
contributions
volatile
organic
compound
(BVOC)
from
Lake
Taihu
in
surrounding
regions
using
a
numerical
approach.
Composite
analysis,
case
studies,
process
analysis
reveal
BVOC
increase
hourly
near‐surface
concentrations,
maximum
rise
25.5
μg
m
−3
,
improving
model
performance.
The
influence
lake
is
large
on
northwest
side
Taihu,
primarily
determined
by
spatial
emission
patterns
dominant
wind
fields.
development
planetary
boundary
layer,
particularly
thermal
internal
enhanced
breeze
play
important
roles
increasing
levels
over
land,
whereas
variations
temperature
minor
role.
Vertical
cross‐sections
show
interactions
between
land‐lake
breezes
background
fields
are
critical
for
transport,
surface
concentrations
areas.
Additionally,
intensify
both
daytime
nighttime
gas‐phase
chemical
consuming
nitrates
producing
additional
within
lower
troposphere.
highlights
importance
local
circulations
pollution,
emphasizing
need
comprehensive
pollution
control
strategies
lakeside
cities.
Catalysts,
Год журнала:
2025,
Номер
15(6), С. 538 - 538
Опубликована: Май 28, 2025
The
construction
of
multicomponent
transition
metal
oxide
catalysts
can
effectively
increase
the
surface
defects
catalysts,
and
bring
a
synergistic
effect
from
different
components,
thus
enhancing
generation
reactive
oxygen
species
improving
catalytic
activity
for
volatile
organic
compounds
(VOCs)
oxidation.
In
this
article,
CuO/Co3O4
with
abundant
vacancies
degradation
ethyl
acetate
was
prepared
by
simple
impregnation
method.
ratio
Co/Cu
on
redox
capacity,
vacancy,
active
oxidation
were
studied.
90%
conversion
mineralization
temperatures
optimal
catalyst
Co3O4-20Cu
are
211
214
°C
(WHSV
=
60,000
mL/(g·h),
1000
ppm
acetate),
which
also
shows
good
stability
excellent
water
vapor
resistance.
Compared
pure
Co3O4,
have
more
vacancies,
provide
species,
allowing
better
low-temperature
reduction.
Through
in
situ
DRIFTS
study,
intermediates
decomposition
analyzed,
then
possible
mechanism
proposed.
addition,
we
Co3O4-20Cu/cordierite
monolithic
basis
Co3O4-20Cu,
exhibiting
acetate.
The
coal
chemical
industry
produces
a
large
amount
of
volatile
organic
compounds
(VOCs),
and
the
emission
characteristics
associated
impact
on
environment
health
residents
are
still
unclear.
This
study
determined
VOC
concentrations
compositions
in
Jinjie
Coal
Chemical
Industry
Park
which
is
located
northern
China.
average
total
measured
VOCs
(TVOCs)
industrial
areas
summer
winter
were
231.5
103.2
μg/m3,
higher
than
those
residential
(123.7
70.3
μg/m3),
respectively.
Aromatics,
carbonyls,
alkanes
dominant
classes
areas,
while
halocarbons,
alkenes
had
where
not
only
affected
by
emissions
also
other
anthropogenic
sources.
Formaldehyde,
ethylene,
m/p-xylene
prevailing
contributors
to
ozone
formation
potential
(OFP),
aromatics
(e.g.,
m/p-xylene,
o-xylene,
ethylbenzene)
showed
largest
contribution
secondary
aerosol
(SOA)
both
seasons.
Using
source
apportionment
method,
gasoline
production,
coking
emission,
fuel
combustion,
solvent
coating,
vehicle
exhaust
five
major
areas.
With
reliable
estimations
aspects,
exposures
acrolein
formaldehyde
posed
highest
non-carcinogenic
carcinogenic
risks,
results
demonstrated
that
substantial
environmental
co-benefits
could
be
achieved
reducing
from
process,
diesel-fueled
vehicles
Park.
Prioritizing
establishment
efficient
air
pollution
measures
tightening
standards,
especially
for
hazardous
VOCs,
recommended
according
findings
valuable
work.
In
the
face
of
escalating
air
pollution
in
Patancheru,
Hyderabad,
'EcoAI
Forecast'
project
presents
a
pioneering
approach.
It
transcends
limitations
traditional
linear
models,
which
fail
to
effectively
map
intricacies
quality
fluctuations.
This
research
introduces
comprehensive
multi-model
machine
learning
framework,
integrating
sophisticated
algorithms
like
LSTM
(Long
Short-Term
Memory),
GRU
(Gated
Recurrent
Unit),
CNN
(Convolutional
Neural
Network),
and
an
Ensemble
model.
These
models
are
adept
at
processing
complex
environmental
datasets,
particularly
focusing
on
nuanced
prediction
PM2.5
levels,
crucial
pollutant.
Utilizing
dataset
enriched
with
hourly
measurements,
study
illustrates
paradigm
shift
from
conventional
methodologies
more
dynamic,
data-driven
techniques.
The
model,
centerpiece
this
research,
demonstrates
exceptional
performance,
achieving
RMSE
(Root
Mean
Square
Error)
0.068
R2
(Coefficient
Determination)
0.945.
metrics
not
only
signify
substantial
improvement
over
but
also
underscore
model's
precision
forecasting
quality.
success
paves
way
for
future
advancements
monitoring,
exemplifying
transformative
potential
advanced
techniques
urban
public
health
preservation.
Toxics,
Год журнала:
2024,
Номер
12(11), С. 787 - 787
Опубликована: Окт. 29, 2024
Volatile
organic
compounds
(VOCs)
are
ubiquitous
in
the
atmosphere,
posing
significant
adverse
impacts
on
air
quality
and
human
health.
However,
current
research
atmospheric
VOCs
mainly
focuses
specific
regions
or
industries,
without
comprehensive
national-level
analysis.
In
this
study,
a
total
of
99
articles
China
published
from
2015
to
2024
were
screened,
data
their
concentrations,
source
apportionment,
health
risks
extracted
summarized.
The
results
revealed
that
annual
average
concentrations
TVOCs
groups
generally
increased
then
decreased
between
2011
2022,
peaking
2018-2019.
A
distinct
seasonal
pattern
was
observed,
with
highest
occurring
winter,
followed
by
autumn,
spring,
summer.
TVOC
emissions
highly
concentrated
northern
eastern
China,
contributed
alkanes
alkenes.
Source
apportionment
indicated
vehicle
sources
(32.9%
±
14.3%),
industrial
(18.0%
12.8%),
other
combustion
(13.0%
13.0%)
primary
China.
There
positive
correlation
(
