To
ensure
good
air
quality
during
China
International
Import
Expo
(CIIE)
episode,
stringent
emission-reduction
measures
were
implemented
in
Shanghai.
better
assess
the
efficacy
of
these
measures,
this
study
explored
four
typical
categories
intermediate/semi
volatile
organic
compounds
(I/SVOCs),
including
alkanes
(C10–C26
n-alkanes
and
pristane),
EPA-priority
polycyclic
aromatic
hydrocarbons
(PAHs),
alkylnaphthalenes,
benzothiazole
(BTH)
chlorobenzenes
(CBs),
at
an
urban
site
Shanghai
before
two
CIIE
episodes
(2019
2020;
non-CIIE
versus
CIIE).
The
average
concentrations
PAHs
both
2019
2020
decreased
by
approximately
41%
17%,
respectively,
compared
to
periods.
However,
decline
was
only
observed
for
BTH
CBs
CIIE-2019.
Under
atmospheric
conditions,
secondary
aerosol
(SOA)
production
from
alkanes,
together
671
±
446
ng/m3,
with
considerable
SOA
contributions
dimethylnaphthalenes
BTH.
Positive
matrix
factorization
(PMF)
source
apportionment
further
revealed
that
life-related
sources
making
a
noticeable
contribution
(21.6%)
except
commonly
concerned
gasoline-vehicle
(31.5%),
diesel-related
emissions
(20.8%),
industrial
(18.6%)
ship
(7.5%).
Our
results
provide
valuable
insights
into
effectiveness
episodes,
reduction
I/SVOCs
emissions,
highlight
more
I/SVOC
individual
species
should
be
considered
research
policy
design.
ACS Omega,
Год журнала:
2024,
Номер
9(13), С. 14923 - 14931
Опубликована: Март 20, 2024
This
study
addresses
the
increasing
concern
about
naphthalene,
a
polycyclic
aromatic
hydrocarbon
(PAH),
highlighting
its
growing
threats
to
environment
and
aquatic
life.
The
research
examines
impact
on
Anabas
testudineus
(Bloch)
through
detailed
dose-specific
bioenzymological
analysis.
Experimental
fish
groups
were
exposed
T1
(0.71
mg/L)
T2
(1.42
naphthalene
concentrations,
representing
25
50%
of
LC50
value,
respectively,
over
1–21
day
period.
Following
experiment,
water
samples
underwent
physicochemical
analysis,
while
tissues
examined
for
diverse
parameters.
Among
these
parameters,
aspirate
aminotransferase
(AST)
alanine
(ALT)
serve
as
crucial
indicators
monitoring
physiological
status
addressing
pollution
induced
by
PAHs,
especially
naphthalene.
Statistical
significance
was
observed
in
morpho-pathological
changes
erythrocyte
alterations,
particularly
presence
tear-drop
appearance
(Tr)
positively
interacting
with
swelled
cells
(Sc),
vacuolated
(Va),
sickle
(Sk)
(P
<
0.05).
These
findings
highlight
significant
biomarker
response
exposure.
A.
tissue
bioenzymology,
apoptosis,
erythrocytic
alterations
exposure
dose-dependent.
highlights
overseeing
controlling
PAH
concentrations
ecosystems
ensure
well-being
(Bloch).
Environmental Science & Technology,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 13, 2024
The
removal
capacity
of
aftertreatment
technologies
equipped
on
diesel
exhaust
in
intermediate
and
semivolatile
organic
compounds
(I/SVOCs)
remains
unclear.
This
study
quantified
the
effect
typical
(China
VI)
engine-emitted
I/SVOCs,
related
secondary
aerosol
(SOA),
toxic
effects.
devices
could
mitigate
emission
factors
(EFs)
by
70.8
±
3.4
to
82.5
20.9%
for
72.7
18.6
77.5
4.2%
SOA
production,
75.7
9.3
82.4
9.2%
equivalent
quantity
(TEQ).
Aftertreatment
units
are
better
removing
alkanes,
benzenes,
ketones.
TEQ
from
cold-start
cycle
is
1.3-
5.7-fold
higher
than
that
hot-start
cycle.
In
contrast,
EFs
ship-emitted
I/SVOCs
3.7-
5.3-fold
those
vehicles
with
an
system
when
burning
same
fuel,
leading
2.1-
3.0-fold
production
3.1-
6.7-fold
TEQ.
Implementation
control
marine
engines
reduce
I/SVOC
EFs,
eye
irritation
ships
76.7
12.2,
75.1
79.1
9.6%,
respectively.
These
results
indicate
it
vital
equip
improve
air
quality
protect
human
health.
Chemical Research in Toxicology,
Год журнала:
2021,
Номер
34(12), С. 2500 - 2511
Опубликована: Ноя. 30, 2021
Triphenyl
phosphate
(TPhP)
is
a
broad-spectrum
organophosphate
compound
widely
used
as
an
additive
in
several
products
to
prevent
ignition.
However,
its
utilization
produces
hazardous
impact
on
various
organisms.
So
far,
very
few
studies
have
investigated
the
acute
toxicity
of
TPhP
at
environmentally
relevant
concentrations
nontarget
aquatic
species.
This
study
aimed
assess
whether
short-term
exposure
(4,
20,
and
100
μg
L-1)
affects
oxidative
stress,
antioxidant
activity,
biomolecule
metabolism,
DNA
stability,
chromosomal
integrity,
apoptosis,
pathological
changes
organs
Labeo
rohita
fingerlings.
The
results
illustrated
that
reactive
oxygen
species
(ROS)
production
lipid
peroxidation
(LPO)
rates
were
significantly
higher
tissues
(brain,
liver,
kidney)
TPhP-treated
groups.
Interestingly,
superoxide
dismutase
(SOD)
catalase
(CAT)
activities
remarkably
decreased
following
exposure.
levels
protein,
glucose,
total
cholesterol
(TC),
triglycerides
(TG),
low-density
lipoprotein
(LDL),
high-density
(HDL)
also
found
be
altered
TPhP-exposed
fish
These
significant
alterations
system
biochemical
profile
induced
genotoxic
responses
such
damage
Furthermore,
incidence
observed
was
dose-dependent.
Likewise,
apoptotic
L.
subsequent
effects
inhibition,
dysregulated
genotoxicity
might
possible
reason
for
rohita.
Taken
together,
present
findings
showed
principally
associated
with
concentrations.
Therefore,
this
illustrates
risks
vertebrate
organisms
real-world
Physical Chemistry Chemical Physics,
Год журнала:
2022,
Номер
24(22), С. 13690 - 13697
Опубликована: Янв. 1, 2022
Inclusion
complexes
of
naphthalene
(NP)
with
cyclodextrins
(CD)
have
been
investigated
so
far
using
non-NMR
techniques
resulting
in
inconsistent
data.
Here,
the
first
application
high-field
NMR
spectroscopy
combination
a
precise
analysis
results
has
allowed
us
to
determine
accurately
stoichiometry
and
their
association
constants.
Titration
measurements
performed
by
1H
D2O
at
magnetic
field
B0
18.8
T.
NP
αCD
form
1
:
2
complex
which
single
molecule
is
closed
capsule
made
up
two
macrocycles.
βCD
build
coexisting
large
binding
Larger
γCD
host
molecules
essentially
similar
as
but
corresponding
constants
are
smaller.
