Aerosol and Air Quality Research,
Год журнала:
2023,
Номер
23(11), С. 230102 - 230102
Опубликована: Янв. 1, 2023
The
use
of
biomass
fuels
for
cooking
persists
on
a
large
scale
in
rural
areas
many
low-and
middle-income
countries,
including
India.
Exposure
to
emissions
from
is
linked
with
adverse
respiratory
health
outcomes
-
likely
mediated
through
the
oxidative
potential
particulate
matter
(PM).
This
study
aims
measure
(OP)
aerosols
kitchens
and
examine
its
association
aerosol
chemical
optical
properties.
Field
measurements
were
conducted
collect
PM2.5
fuel
Maharashtra,
Chemical
methods
employed
understand
PM
characteristics,
while
OP
was
measured
using
Dithiothreitol
(DTT)
assay.
average
(±
SD)
indoor
PM2.5,
OC,
EC,
BC,
WSOC
during
1025
±
1001,
203
196,
140
133,
112
61,
130
118
μg
m-3,
respectively,
corresponding
village
outdoor
levels
~12.8
(p=0.04),
4.9
(p=0.14),
19.8
(p=0.09),
23.6
(p=0.01),
8.1
(p=0.12)
folds
(statistical
significance
difference)
lower,
respectively.
volume
normalized
(DTTv)
25.3
nmol
DTT
min-1
which
an
order
magnitude
higher
redox
active
than
ambient
PM.
Carbonaceous
components
correlated
positively
OP,
having
significant
EC1
(R=0.83),
BC
(R=0.93),
absorption
coefficient
(WSOC
babs,
365)
(R=0.97).
Our
findings
suggest
that
may
pose
substantial
risk
population,
particular
women
young
children
toxicity
emitted
due
soot
absorbing
OC
Environment International,
Год журнала:
2024,
Номер
195, С. 109185 - 109185
Опубликована: Дек. 9, 2024
Carbonaceous
aerosols
(CA),
composed
of
black
carbon
(BC)
and
organic
matter
(OM),
significantly
impact
the
climate.
Light
absorption
properties
CA,
particularly
BC
brown
(BrC),
are
crucial
due
to
their
contribution
global
regional
warming.
We
present
(b
Atmospheric chemistry and physics,
Год журнала:
2024,
Номер
24(5), С. 3065 - 3078
Опубликована: Март 11, 2024
Abstract.
Brown
carbon
(BrC)
is
an
organic
component
with
noticeable
absorption
in
the
ultraviolet
and
short
visible
wavelengths,
which
influences
global
radiative
balance.
However,
assessing
BrC
effects
remains
a
challenging
task
owing
to
scarcity
of
direct
observations
uncertainties
regarding
their
chemical
optical
properties.
This
study
proposes
efficient
method
for
estimating
based
on
available
observational
data.
The
light-absorbing
properties
obtained
from
aethalometer
measurements
separation
were
combined
simulated
determine
mass
concentrations.
An
closure
was
conducted
constrain
total
other
aerosol
contents.
Subsequently,
we
estimated
Such
state-of-the-art
combination
numerical
models
provides
primary
variables
simulating
transfer
estimate
effects.
We
used
over
4
months
(from
1
July
18
November
2021)
Nanjing
(a
megacity
east
China)
as
example.
During
period,
constituted
8.7
%–34.1
%
at
370
nm.
In
atmosphere,
plays
warming
role,
its
average
instantaneous
forcing
(RF)
standard
deviation
4.0
±
2.3
W
m−2
corresponding
15
4.2
black
(BC)
RF.
At
surface,
BrC-induced
actinic
flux
(AF)
attenuation
comparable
that
caused
by
BC,
accounting
55
BC
UV
range
almost
20
range.
photosynthetically
active
radiation
(PAR)
attenuated
approximately
33.5
9.4
BC.
Furthermore,
quantified
several
microphysical
These
findings
provide
valuable
insights
understanding
Moreover,
they
highlight
importance
necessity
improved
observation
modeling
Journal of Hazardous Materials,
Год журнала:
2025,
Номер
494, С. 138431 - 138431
Опубликована: Апрель 28, 2025
Fine
aerosol
Polycyclic
Aromatic
Hydrocarbons
(PAHs),
Oxygenated
(OPAHs)
and
other
PM2.5
components
were
quantified
in
Ioannina,
a
Southeastern
European
city
facing
severe
air
quality
degradation
due
to
residential
biomass
burning
(BB).
Compound
(PAC)
seasonal
means
extremely
enhanced
winter
compared
summer
(by
98
88
times
for
PAHs
OPAHs,
respectively).
Benzo(a)pyrene
(BaP)
registered
347-fold
increase,
its
estimated
annual
mean
was
2.4
higher
than
the
EU
standard.
Medium-
high-molecular
weight
PAC
species
correlated
well
with
DTTv
activity
(R2:
0.48
0.54,
respectively),
suggesting
also
their
significant
non-carcinogenic
potential.
These
groups
strongly
associated
methanol-
water-soluble
Brown
Carbon
absorption
(R2
>
0.7).
Source
apportionment
by
Positive
Matrix
Factorization
(PMF)
on
speciation
dataset
indicated
BB
as
major
source,
contributing
80
%
average
Σ-PAC
concentrations
carcinogenic
potential
during
study
period.
The
risk
assessment
highlighted
importance
of
considering
inclusion
not
only
legacy
but
emerging
very
high
toxicity,
such
Benzo(c)fluorene
Dibenzo-pyrenes.
Observed
alarming,
posing
substantial
short-
especially
long-term
risks.
Therefore,
there
is
an
urgent
need
regulate
Ioannina
similar
urban
environments
SE
Europe.
Journal of Geophysical Research Atmospheres,
Год журнала:
2025,
Номер
130(10)
Опубликована: Май 22, 2025
Abstract
This
study
investigated
the
chemical
composition
and
shortwave
absorption
coefficient,
β
abs
(
λ
),
of
aerosols
collected
from
sites
on
Highveld,
a
major
industrial
highly
polluted
region
South
Africa.
Local
anthropogenic
mineral
dust
was
found
to
be
dominant
component,
accounting
for
(53
±
14)%
aerosol
mass
concentrations.
Carbonaceous
(34
12)%,
mainly
domestic
waste
biomass
burning,
secondary
inorganic
(13
6%)
combustion
sources
were
also
found.
High
)
observed
at
all
sites,
with
an
estimated
efficiency,
MAE(
(1,296
472)
10
−3
m
2
g
−1
375
nm
(621
239)10
850
nm.
The
contributions
primary
light‐absorbing
determined
using
tracers
two
optical
clusters
identified
based
MAE
black
carbon
(BC).
BC
contributor
wavelengths
(>60%).
brown
contribution
decreased
(8–40)
%
(1–23)
532
nm,
higher
in
Cluster
1
than
2.
Anthropogenic
appeared
more
light
absorbing
pure
desert
significant
constant
wavelength
∼16%.
levels
have
implications
radiation
budget
atmospheric
stability.
Although
dominates
African
contributes
significantly
concentrations
enhanced
light‐absorption.
Atmosphere,
Год журнала:
2025,
Номер
16(6), С. 644 - 644
Опубликована: Май 26, 2025
This
study
examines
the
seasonality
of
Black
Carbon
(BC)
and
Brown
(BrC)
spectral
absorption
characteristics
at
a
continental
background
site
(Kozani)
in
southern
Balkans
(NW
Greece).
It
aims
to
assess
impact
different
sources
on
light
properties,
BC
concentrations,
fraction
BrC
absorption.
Moderate-to-low
concentrations
were
observed,
ranging
from
0.05
µg
m−3
2.44
an
hourly
basis
(annual
mean:
0.44
±
0.27
m−3;
median:
0.39
m−3)
with
higher
levels
during
winter
(0.53
0.33),
reflecting
enhanced
emissions
residential
wood
burning
(RWB)
for
heating
purposes.
Atmospheric
conditions
are
mostly
clean
spring
(MAM)
(BC:
0.34
m−3),
associated
increased
rainfall.
components
fossil
fuel
combustion
(BCff)
biomass
(BCbb),
maximize
summer
(0.36
(0.28
respectively,
while
Ångstrôm
exponent
(AAE370–880)
values
ranged
1.09
1.93
daily
basis.
The
annual
mean
total
coefficient
(babs,520)
inferred
by
aethalometer
(AE33)
was
4.09
2.65
Mm−1
(median:
3.51
Mm−1),
peaking
(5.30
3.35
Mm−1).
Furthermore,
contribution
370
nm,
also
high
(36.7%),
lower
rest
year
(17.3–29.8%).
measuring
station
is
located
rural
4
km
outside
Kozani
City
not
directly
affected
traffic
urban
emissions.
Therefore,
regional
atmosphere
composed
significant
carbonaceous
aerosols
RWB
nearby
villages,
characteristic
feature
Balkan’s
environment.
Emissions
lignin-fired
power
plants,
still
operating
region,
have
decreased
last
years
moderately
affect
atmospheric
conditions.
