Environmental Science Processes & Impacts,
Год журнала:
2023,
Номер
26(2), С. 305 - 322
Опубликована: Дек. 18, 2023
Monte
Carlo
simulations
of
long-term
indoor
organic
surface
film
growth
were
done.
Film
composition
was
resolved
by
volatility,
particle
deposition
or
gas
absorption
formation
mechanisms,
and
source
process.
ACS ES&T Air,
Год журнала:
2024,
Номер
1(8), С. 918 - 926
Опубликована: Июнь 18, 2024
After
being
transported
from
outdoor
to
indoor
environments,
a
large
portion
of
ozone
(O3)
reacts
with
chemicals
generate
O3
reaction
products.
A
fraction
these
products
can
partition
fine
particulate
matter
(PM2.5).
Hence,
we
hypothesize
that
PM2.5
serves
as
carrier
deliver
the
deep
lung,
leading
synergistic
adverse
pulmonary
effects.
In
panel
study
involving
43
children
asthma,
each
was
assessed
4
times
(2-week
interval)
for
biomarkers
respiratory
pathophysiology
and
personal
exposures
O3.
We
also
loss
exposures,
calculated
by
taking
difference
between
concentrations,
which
proportional
net
exposure
found
effects
on
inflammation,
airway
(especially
lower
airway)
mechanics,
spirometry
lung
function
were
greater
at
higher
levels.
This
suggests
an
additional
mechanism
effects:
predisposes
be
more
susceptible
vice
versa.
However,
our
data
is
limited
in
differentiating
two
potential
mechanisms.
Environmental Science & Technology,
Год журнала:
2024,
Номер
unknown
Опубликована: Фев. 21, 2024
Human
chemical
exposure
often
occurs
indoors,
where
large
variability
in
contaminant
concentrations
and
indoor
dynamics
make
assessments
of
these
exposures
challenging.
A
major
source
uncertainty
lies
the
rates
transformations
which,
due
to
high
surface-to-volume
ratios
rapid
air
change
relative
gas-phase
reactions
are
largely
gas-surface
multiphase
processes.
It
remains
unclear
how
important
such
chemistry
is
controlling
lifetimes
and,
therefore,
human
both
parent
compounds
transformation
products.
We
present
a
multimedia
steady-state
fugacity-based
model
assess
importance
cleaning
mass
transfer
losses,
examine
physicochemical
properties
features
environment
affect
processes,
investigate
uncertainties
pertaining
lifetimes.
find
that
can
play
an
role
fate
indoors
for
reactive
with
low
volatility,
i.e.,
octanol-air
equilibrium
partitioning
(Koa)
above
108,
impact
this
dependent
on
identity,
oxidant
type
concentration,
other
parameters.
This
work
highlights
need
further
research
into
constrain
chemicals
built
environment.
Nature Communications,
Год журнала:
2025,
Номер
16(1)
Опубликована: Фев. 12, 2025
Organic
films
containing
unsaturated
lipids
are
widespread,
yet
their
oxidation
pathways
with
associated
impacts
on
contaminant
lifetimes
and
human
exposure
remain
poorly
explored
under
indoor
environmental
conditions.
This
study
demonstrates
that
UVA
radiation
radical
drive
rapid
autoxidation
of
thin
methyl
linolenate
(ML)
canola
oil
(which
contains
polyunsaturated
triglycerides),
primarily
producing
organic
hydroperoxides.
For
ML
this
fast
chemistry
occurs
at
the
same
rate
entirely
dark,
genuine
conditions
as
it
does
when
exposed
to
significantly
higher
•OH
radicals
in
a
flow
reactor.
Both
detected
within
oxidized
films,
propagating
dark
environments
minimal
sensitivity
initiation
rate.
When
mixed
into
bisphenol
A
is
hydroxylated,
illustrating
potential
transformation
for
toxic
contaminants.
uncovers
insights
lipid
processes
underscores
health
impacts.
but
Here,
authors
demonstrate
oil,
Materials
derived
from
natural
sources
are
demanded
for
future
applications
due
to
the
combination
of
factors
such
as
sustainability
increase
and
legislature
requirements.
The
availability
efficient
analysis
vegetable
oils
(triacylglycerides)
open
an
enormous
potential
incorporating
these
compounds
into
various
products
ensure
ecological
footprint
decreases
provide
advantageous
properties
eventual
products,
flexibility,
toughness,
or
exceptional
hydrophobic
character.
double
bonds
located
in
many
centers
chemical
functionalization,
epoxidization,
hydroxylation,
nucleophile
substitutions
using
acids
anhydrides.
Naturally
occurring
castor
oil
comprises
a
reactive
vacant
hydroxyl
group,
which
can
be
modified
via
numerous
approaches.
This
comprehensive
Review
provides
overall
insight
toward
multiple
materials
utilities
functionalized
glycerides
additive
manufacturing
(3D
printing),
polyurethane
(including
their
recycling),
coatings,
adhesives.
work
complex
list
investigated
studied
throughout
available
literature
describes
principles
each
selected
application.
Environmental Science Processes & Impacts,
Год журнала:
2024,
Номер
26(7), С. 1198 - 1204
Опубликована: Янв. 1, 2024
Reactive
oxygen
species
(ROS)
are
relatively
unstable
oxygen-containing
radicals
or
non-radicals,
some
of
which
may
react
with
tissues
and
biomolecules
after
entering
the
body.
ROS
is
present
in
indoor
aerosols,
but
it
unclear
how
much
that
origin.
Indoor
surface
films
have
been
hypothesized
to
be
a
major
source
observed
on
aerosols.
In
this
study,
concentration
residential
surfaces
was
measured
using
xylenol
orange
ferrous
oxidation
assay
wiping
extraction.
On
genuine
frequently
touched
by
apartment
occupants,
>0.2
nmol
cm-2;
infrequently
were
at
below
detection
limits.
clean
glass
plates
had
deployed
apartments
for
6
weeks,
horizontal
higher
concentrations
than
vertically
oriented
plates.
The
highest
concentration,
1.3
cm-2,
horizontally
plate
close
an
electric
stove.
To
simulate
dynamic
unsaturated
hydrocarbons
surfaces,
lipid
mixture
(SLM)
dosed
19
then
exposed
untreated
laboratory
air
periods
ranging
from
1
56
days.
During
first
5-6
days,
increased
roughly
linearly
maximum
cm-2.
Then
ceased
increase,
perhaps
because
reactive
sites
become
depleted.
After
2
decreased
slowly,
possibly
due
combination
volatilization,
decomposition
continued
formation
autoxidation.
These
field
results
support
hypothesis
can
ROS.
Environmental Science & Technology,
Год журнала:
2024,
Номер
58(27), С. 12073 - 12081
Опубликована: Июнь 26, 2024
Ozone
and
its
oxidation
products
result
in
negative
health
effects
when
inhaled.
Despite
painted
surfaces
being
the
most
abundant
surface
indoor
spaces,
loss
remains
one
of
largest
uncertainties
ozone
budget.
Here,
uptake
coefficients
(γ