Chemosphere,
Год журнала:
2024,
Номер
370, С. 143910 - 143910
Опубликована: Дек. 13, 2024
The
approximately
850,000
recreational
boats
in
Sweden,
has
shown
to
have
a
significant
impact
on
the
marine
environment
of
Swedish
west
coast.
extensive
weather-protected
archipelagos
and
fjords
with
minor
tidal
activity,
offers
excellent
conditions
uncover
traces
leisure
exhaust
from
background.
In
this
study
we
focus
polycyclic
aromatic
hydrocarbons
(PAHs)
boat
exhausts
surface
sediments
water
(using
SPMD)
busy
harbour
pristine
fjord.
PAH
analyses
were
performed
using
gas
chromatography
-
mass
spectrometry
after
suitable
extraction
procedures.
Concentrations
total
PAHs
was
4-8
ng/L
200-5500
ng/g
respectively.
addition
measurements,
used
number
documented
motorboat
passages
together
residence
time
water,
quantify
concentration
enhancement
up
40%
due
boating.
Here
for
first
succeeded
distinguishing
signature
coastal
environments.
This
by
combining
our
data
observed
compositions
lakes
where
emissions
is
as
dominating
source
pollution.
Comparisons
Environmental
Quality
standards
(EQS)
showed
elevated
levels
more
than
five
times
most
exposed
sediments,
while
concentrations
below
EQS.
concludes
that
boating
activities
significantly
contribute
PAH-levels
these
environments,
implications
environmental
management
pollution
mitigation
strategies.
Journal of Environmental Science and Health Part B,
Год журнала:
2025,
Номер
unknown, С. 1 - 9
Опубликована: Фев. 26, 2025
Pesticides
intoxication
affects
aquatic
organisms
as
well
a
group
of
contaminants
that
are
represented
by
crude
oil,
petroleum
hydrocarbons
(PHs),
polycyclic
aromatic
(PAHs)
and
their
derivatives.
Useful
tools
for
ecotoxicological
studies
marine
ecosystems
based
on
biomarker
application
bioindicator
key
fish
species.
The
aim
the
present
study
was
to
highlight
presence
pesticides
in
coastal
environment,
harbour
Capo
d'Orlando
town
(northeastern
Sicily,
Italy),
using
Acetylcholinesterase
(AChE)
Butyrylcholinesterase
(BChE)
enzymatic
activities
species
Chelon
labrosus.
A
reference
site
selected.
Chemical
analysis
water
samples
also
carried
out
analyze
eventually
confirm
area.
Results
showed
significant
inhibition
AChE
(80%)
BChE
(77%)
from
compared
site.
esterase
is
primarily
due
organophosphorus
insecticides
carbamates,
resulted
higher
concentrations
quality
standard
decree
(Ministerial
Decree
260,
2010).
This
highlighted
contamination
most
probably
d'Orlando,
which
represents
threat
human
population
consuming
affected
fish.
Scientific Reports,
Год журнала:
2025,
Номер
15(1)
Опубликована: Фев. 3, 2025
Currently,
there
is
a
lack
of
comprehensive
understanding
the
behavior
polycyclic
aromatic
hydrocarbons
(PAHs)
in
complex
multimedia
urban
environmental
systems.
Taking
Urumqi
City
as
case
study,
we
developed
an
integrated
model
to
simulate
inter-media
transport
processes
PAHs
across
air,
water,
soil,
sediment,
vegetation,
and
impervious
surfaces.
The
predictive
results
this
were
good
agreement
with
actual
monitoring
data
from
2021,
confirming
its
accuracy.
Notably,
simulated
for
2021
indicate
that
total
amount
soil
reached
1.06
×
106
kg,
accounting
97.44%
City,
highlighting
primary
sink
PAHs.
Further
analysis
fluxes
revealed
atmospheric
transfer
pathways
vegetation
are
main
mechanisms
driving
distribution
environments.
Additionally,
sensitivity
identified
temperature,
vegetation-related
parameters
factors
influencing
Based
on
concentration,
risk
assessment
showed
had
higher
carcinogenesis
human
body.
This
study
deepens
our
environments
provides
insights
into
how
activities
affect
fate
transformation
these
contaminants
Environmental Science & Technology,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 14, 2025
Polycyclic
aromatic
hydrocarbons
(PAHs)
are
toxic
and
persistent
pollutants
that
widely
distributed
in
the
environment.
PAHs
to
microorganisms
pose
ecological
risks.
Bacteria
encode
enzymes
for
PAH
degradation
through
specific
genes,
thereby
mitigating
pollution.
However,
due
PAHs'
complexity,
information
on
global
potential,
diversity,
associated
risks
of
PAH-degrading
microbes
soils
is
lacking.
In
this
study,
we
analyzed
121
genes
selected
33
as
marker
predict
potential
within
soil
microbiome.
By
constructing
a
Hidden
Markov
Model,
identified
4990
species
carrying
40,039
metagenomic
assembly
genomes,
with
Burkholderiaceae
Stellaceae
emerging
high-potential
degraders.
We
demonstrated
candidate
degraders
predominantly
emerged
artificial
farmland,
significantly
fewer
present
extreme
environments,
driven
by
factors
such
average
annual
rainfall,
organic
carbon,
human
modification
terrestrial
systems.
Furthermore,
comprehensively
quantified
each
host
future
practical
applications
using
three
indicators
(antibiotic
resistance
virulence
factors,
pathogenic
bacteria).
found
degrader
has
significant
application
prospects.
Our
research
will
help
determine
biosynthetic
globally
further
identify
bacteria
at
lower
risk.
Abstract
Polycyclic
aromatic
hydrocarbons
(PAHs)
are
omnipresent
toxic
pollutants
found
in
numerous
ecosystems,
including
soil,
water,
and
living
organisms.
Due
to
their
hydrophobic
nature,
PAHs
tend
accumulate
aquatic
environments,
leading
high
concentrations
sediments
subsequent
bioaccumulation
This
accumulation
poses
substantial
risks
humans
life.
Recent
advances
photocatalytic
methods,
particularly
those
using
nanocomposite
materials,
have
shown
promising
outcomes
the
degradation
of
PAHs.
Photocatalysis,
a
process
that
uses
UV
visible
light
accelerate
chemical
reaction,
is
effectively
breaking
these
harmful
compounds.
review
focuses
on
recent
PAHs,
toxicological
effects
organisms,
mechanisms
underlying
nanocomposite‐based
photocatalysis.
The
utilization
for
photocatalysis
an
eco‐friendly
substitute
traditional
methods
remediating
PAH
pollution
ecosystem.
green
approach
offers
sustainable
effective
Environmental Science & Technology,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 26, 2024
Polycyclic
aromatic
hydrocarbons
(PAHs)
are
widespread
contaminants
that
can
accumulate
in
microorganisms,
posing
significant
ecological
risks.
While
previous
studies
primarily
focused
on
PAH
concentrations,
the
impacts
of
self-clustering
have
been
largely
overlooked,
which
will
lead
to
inaccurate
assessments
their
This
study
evaluates
toxic
effects
four
prevalent
clusters
microbes
with
an
emphasis
comparing
cluster
sizes.
Results
revealed
over
95%
PAHs
form
aquatic
environment,
smaller
more
likely
at
lower
concentrations
and
fewer
benzene
rings.
To
quantify
understand
underlying
mechanisms,
single-cell
Raman-D2O
was
employed
link
bacterial
phenotypes
transcriptomic
profiles.
Bacteria
exposed
showed
a
1%–10%
reduction
metabolic
activity,
associated
1.8–2.9-fold
increase
intracellular
reactive
oxygen
species
(ROS).
Furthermore,
when
clusters,
expression
genes
related
ROS
response
efflux
pumps
upregulated
by
up
6.33-fold
4.97-fold,
respectively,
suggesting
pose
greater
toxicity
microbes.
These
findings
underscore
potentially
overlooked
risks
environmental
systems
deepen
our
understanding
fate
these
contaminants.
