Journal of Xenobiotics,
Journal Year:
2025,
Volume and Issue:
15(1), P. 31 - 31
Published: Feb. 12, 2025
Polyaromatic
hydrocarbons
(PAHs)
are
a
group
of
organic
pollutants
commonly
found
in
the
environment
due
to
industrial
activities,
incomplete
burning
fossil
fuels,
and
oil
spills.
Bioremediation
PAHs
has
emerged
as
promising
approach.
This
study
investigated
biodegradation
(anthracene,
naphthalene,
phenanthrene,
anthraquinone,
anthrone)
at
100
ppm
1000
presence
glucose
glycerol
by
biosurfactant-producing
strain
Pseudomonas
aeruginosa
NG4.
The
quality
biosurfactant
produced
bacterial
was
analyzed
via
emulsion
index
(E24),
drop-collapse
assay,
displacement
assay.
PAH
degradation
efficiency
studied
HPLC
metabolites
were
using
GC-MS.
Among
all
five
(fed
300
ppm),
highest
rates
91.16
±
3.64%
naphthalene
41.16
1.64%
anthrone
observed
P.
NG4
after
10
days
incubation.
assessment
intermediate
revealed
catabolism
dioxygenase
route,
which
plays
key
role
breakdown
these
aromatic
compounds.
Biodegradation
level
media
reported
for
first
time.
highlights
potential
candidate
development
bioremediation
strategies
mitigate
environmental
pollution
caused
persistent
like
PAHs.
Environment International,
Journal Year:
2023,
Volume and Issue:
173, P. 107869 - 107869
Published: March 1, 2023
Microalgal
bioassays
are
widely
applied
to
evaluate
the
potential
toxicity
of
various
persistent
toxic
substances
in
environmental
samples
due
multiple
advantages,
including
high
sensitivity,
short
test
duration,
and
cost-effectiveness.
bioassay
is
gradually
developing
method,
scope
application
also
expanding.
Here,
we
reviewed
published
literature
on
microalgal
for
assessments,
focusing
types
samples,
sample
preparation
methods,
endpoints,
highlighted
key
scientific
advancements.
Bibliographic
analysis
was
performed
with
keywords
'microalgae'
'toxicity'
or
'bioassay',
'microalgal
toxicity';
89
research
articles
were
selected
reviewed.
Traditionally,
most
studies
implementing
focused
water
(44%)
passive
samplers
(38%).
Studies
using
direct
exposure
method
(41%)
injecting
microalgae
into
sampled
mainly
evaluated
effects
by
growth
inhibition
(63%).
Recently,
automated
sampling
techniques,
situ
bioanalytical
methods
targeted
non-targeted
chemical
analyses
have
been
applied.
More
needed
identify
causative
toxicants
affecting
quantify
cause-effect
relationships.
This
study
provides
first
comprehensive
overview
recent
advances
suggesting
future
directions
based
current
understanding
limitations.
Chemosphere,
Journal Year:
2023,
Volume and Issue:
336, P. 139285 - 139285
Published: June 21, 2023
The
Amazon
is
the
largest
river
by
discharge
volume
and
one
of
most
biodiverse
biomes
in
world.
Lately,
there
has
been
a
rapid
increase
urban
population
region,
which
translated
into
growing
emission
organic
contaminants
such
as
polycyclic
aromatic
hydrocarbons
(PAHs)
surface
water
bodies.
This
study
provides
comprehensive
evaluation
PAH
contamination
levels
waters
basin.
We
investigated
occurrence
potential
sources
16
priority
PAHs
characterised
their
risks
for
freshwater
ecosystems.
For
this,
we
took
40
samples
from
different
sites
along
Brazilian
part
River,
including
three
major
tributaries,
smaller
rivers
crossing
main
areas.
results
this
show
that
are
widespread
Amazon.
sum
total
concentration
reached
values
134
ng
L-1
163
near
densely
populated
On
other
hand,
was
generally
lower
monitored
tributaries.
In
samples,
pattern
dominated
high
molecular
weight
PAHs,
suggesting
contribution
pyrogenic
sources,
although
petrogenic
also
present
some
locations
assessed
ecological
posed
mixtures
using
hazard
index.
indicated
not
likely
to
pose
direct
toxic
effects
Amazonian
organisms,
however
continued
monitoring
recommended
Environment International,
Journal Year:
2024,
Volume and Issue:
184, P. 108448 - 108448
Published: Jan. 18, 2024
Biosurfactants-based
bioremediation
is
considered
an
efficient
technology
to
eliminate
environmental
pollutants
including
polycyclic
aromatic
hydrocarbons
(PAHs).
However,
the
precise
role
of
rhamnolipids
or
lipopeptide-biosurfactants
in
mixed
PAH
dissipation,
shaping
microbial
community
structure,
and
influencing
metabolomic
profile
remained
unclear.
In
this
study,
results
showed
that
maximum
degradation
was
achieved
lipopeptide-assisted
treatment
(SPS),
where
pyrene
phenanthrene
were
substantially
degraded
up
74.28%
63.05%
respectively,
as
compared
(SPR)
un-aided
biosurfactants
(SP).
Furthermore,
high
throughput
sequencing
analysis
revealed
a
significant
change
PAH-degrading
community,
with
Proteobacteria
being
predominant
phylum
(>98%)
followed
by
Bacteroidota
Firmicutes
all
treatments.
Moreover,
Pseudomonas
Pannonibacter
found
highly
potent
bacterial
genera
for
SPR,
SPS,
SP
treatments,
nevertheless,
abundance
genus
significantly
enhanced
(>97%)
SPR
groups.
On
other
hand,
non-targeted
through
UHPLC-MS/MS
exhibited
remarkable
metabolites
amino
acids,
carbohydrates,
lipid
metabolisms
input
whereas,
intensities
(more
than
two-fold)
observed
treatment.
The
findings
study
suggested
aforementioned
can
play
indispensable
well
seek
offer
new
insights
into
shifts
communities
their
metabolic
function,
which
guide
development
more
targeted
strategies
complete
removal
organic
such
from
contaminated
environment.
Journal of Hazardous Materials,
Journal Year:
2024,
Volume and Issue:
471, P. 134401 - 134401
Published: April 25, 2024
Tire
wear
particles
(TWP)
stand
out
as
a
major
contributor
to
microplastic
pollution,
yet
their
environmental
impact
remains
inadequately
understood.
This
study
delves
into
the
cocktail
effects
of
TWP
leachates,
employing
molecular,
cellular,
and
organismal
assessments
on
diverse
biological
models.
Extracted
in
artificial
seawater
analyzed
for
metals
organic
compounds,
leachates
revealed
presence
polyaromatic
hydrocarbons
4-tert-octylphenol.
Exposure
(1.5
1000
mg
peq
L−1)
inhibited
algae
growth
induced
zebrafish
embryotoxicity,
pigment
alterations,
behavioral
changes.
Cell
painting
uncovered
pro-apoptotic
changes,
while
mechanism-specific
gene-reporter
assays
highlighted
endocrine-disrupting
potential,
particularly
antiandrogenic
effects.
Although
heavy
like
zinc
have
been
suggested
players
leachate
toxicity,
this
emphasizes
water-leachable
compounds
primary
causative
agents
observed
acute
toxicity.
The
findings
underscore
need
reduce
pollution
aquatic
systems
enhance
regulations
governing
highly
toxic
tire
additives.
pose
significant
threat,
contributing
releasing
harmful
chemical
contaminants.
unveils
hazardous
nature
introducing
detrimental
ecosystems.
Identified
pollutants,
notably
hydrocarbons,
induce
impede
growth,
alter
behavior,
disrupt
signaling
pathways.
These
revelations
emphasize
material
affecting
life
at
multiple
levels,
posing
risks
health
both
ecosystems
and,
potentially,
human
well-being.
Enhancing
our
understanding
mechanisms
is
crucial
mitigating
these
safeguarding
from
deleterious
