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
Atmospheric Environment,
Год журнала:
2024,
Номер
324, С. 120435 - 120435
Опубликована: Март 2, 2024
Measurements
of
absorption
coefficients
(σap,λ)
and
carbonaceous
components
(OC,
EC,
WSOC
levoglucosan)
in
PM1
were
conducted
at
an
urban
background
site
southeastern
Spain
throughout
2021.
The
main
goal
this
research
was
to
determine
the
contribution
from
different
sources
light
(σWSOC).
For
this,
σBrC,λ
values
previously
obtained.
mean
BrC
total
aerosol
∼29%
370
nm,
revealing
a
significant
influence
study
area.
Assuming
that
WIOC,
multilinear
regression
(MLR)
model
used
estimate
σWSOC
σWIOC.
Average
(mean
±
SD)
very
similar
for
both
components:
σWSOC,370
=
1.6
(±0.7)
Mm−1
σWIOC,370
1.9
Mm−1.
Finally,
PMF
technique
coupled
with
MLR
analysis
identify
their
contribution.
Our
findings
point
biomass
burning
as
dominant
source
during
cold
season,
∼37%.
Mineral
Dust
Secondary
Nitrate
sources,
not
included
due
low
mass
concentrations,
accounted
percentage
period.
organic
major
warm
season
(∼56%),
followed
by
traffic
emissions
(∼30%).
The Science of The Total Environment,
Год журнала:
2024,
Номер
955, С. 177089 - 177089
Опубликована: Ноя. 1, 2024
Brown
carbon
(BrC)
is
an
organic
aerosol
(OA)
component
that
possesses
light-absorbing
properties
in
the
UV-Vis
spectrum,
impacting
climate.
However,
current
understanding
of
climate
repercussions
stemming
from
BrC
emissions
remains
insufficient
due
to
a
lack
comprehensive
knowledge
regarding
its
chemical
makeup,
light-absorption,
and
role
atmospheric
aging
shaping
properties.
This
study
investigates
PM
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
