Environmental Research,
Год журнала:
2022,
Номер
216, С. 114834 - 114834
Опубликована: Ноя. 15, 2022
Microplastics
(MPs)
and
perfluoroalkyl
substances
(PFASs)
are
two
types
of
pollutants
coexisting
in
the
environment.
Their
co-exposure
is
a
source
increasing
concern.
MPs
present
natural
environment
suppose
an
ideal
surface
for
sorption
hazardous
contaminants.
This
study
investigates
adsorption
behaviour
six
PFASs
on
polyamide
(PA)
MPs.
Adsorption
experiments
under
various
internal
(PA
dosage,
PA
particle
size)
environmental
(pH,
ionic
strength,
dissolved
organic
matter)
factors
were
carried
out.
Isotherm
results
(from
0.1
to
25
mg/L
PFASs)
showed
that
maximum
capacity
selected
was
as
follows:
perfluorooctanesulfonic
acid
(PFOS,
0.873
mg/g)
>
perfluorooctanoic
(0.235
perfluoroheptanoic
(0.231
perfluorohexanoic
(0.201
perfluoropentanoic
(0.192
perfluorobutanoic
(0.188
(pH
5.88,
0%
salinity
matter).
The
PFOS
has
more
tendency
be
sorbed
onto
than
perfluorocarboxilic
acids.
MP
characterization
by
scanning
electron
microscopy,
X
ray
diffraction
Fourier
transform
infrared
spectroscopy
changes
after
assays.
Pore
filling,
hydrophobic
interactions
hydrogen
bonds
governed
process.
crucially
affected
size
19.6%
99.9%
3
mm
50
μm
size,
respectively).
process
not
significantly
influenced
while
matter
exerted
negative
effect
(decrease
from
100%
26%
presence
humic
acid).
Finally,
rates
quantified
real
water
matrices
(influent
effluent
wastewater,
tap
samples).
revealed
between
evidenced
role
vector
transport
aquatic
Trends in Environmental Analytical Chemistry,
Год журнала:
2022,
Номер
35, С. e00170 - e00170
Опубликована: Июнь 27, 2022
Microplastics
(MPs)
and
other
emerging
pollutants
exist
together
in
the
environment
their
co-exposure
represents
a
source
of
increasing
concern
as
MPs
have
been
reported
to
act
carriers
due
high
sorption
capacity.
The
ingestion
contaminated
by
organisms
can
enhance
desorption
pollutants,
bioavailability
toxicity.
This
review
examines
role
vectors
environmental
contaminants.
First,
main
tools
used
identify
characterise
analytical
methods
for
determination
associated
contaminants
are
discussed.
Insightful
explanations
interaction
between
several
groups
provided.
MP
type
(polarity,
crystallinity,
size)
aging
process
with
conditions
pollutant
properties
(hydrophobicity
dissociated
forms)
key
factors
influencing
process.
literature
showed
that
polyethylene
polystyrene
were
most
commonly
studied
polymers.
Antibiotics,
perfluoroalkyl
compounds
triclosan
capacities
onto
MPs.
Finally,
effect
MPs-emerging
bioaccumulation
aquatic
terrestrial
is
combined
exposure
may
impact
toxic
effects
different
ways,
through
synergistic
or
antagonic
interactions.
Examples
scenarios
provided,
but
general
research
conducted
on
systems
scarce.
results
revealed
lack
standardization
laboratory
studies
testing
reflect
actual
exposure.
The Science of The Total Environment,
Год журнала:
2022,
Номер
863, С. 160953 - 160953
Опубликована: Дек. 19, 2022
Microplastics,
defined
as
particles
<5
mm
in
diameter,
are
emerging
environmental
pollutants
that
pose
a
threat
to
ecosystems
and
human
health.
Biofilm
degradation
of
microplastics
may
be
an
ecologically
friendly
approach.
This
review
systematically
summarises
the
factors
affecting
biofilm
proposes
feasible
methods
improve
efficiency
microplastic
degradation.
Environmentally
insensitive
microorganisms
were
screened,
optimized,
commercially
cultured
facilitate
practical
application
this
technology.
For
strain
screening,
technology
should
focus
on
microorganisms/strains
can
modify
hydrophobicity
microplastics,
degrade
crystalline
zone
metabolise
additives
microplastics.
The
biodegradation
mechanism
is
also
described;
secreting
extracellular
oxidases
hydrolases
key
for
Measuring
changes
molecular
weight
distribution
(MWD)
enables
better
analysis
behaviour
has
relatively
few
applications
because
its
low
efficiency;
however,
enrichment
freshwater
environments
wastewater
treatment
plant
tailwater
currently
most
effective
method
treating
with
biofilms.
TrAC Trends in Analytical Chemistry,
Год журнала:
2024,
Номер
172, С. 117566 - 117566
Опубликована: Янв. 30, 2024
The
analysis
of
microplastics
(MPs)
in
terrestrial
environments
and
the
evaluation
their
environmental
risk
has
gained
great
attention,
owing
to
increasing
evidence
for
widespread
presence
soils
freshwater
sediments
globally.
Once
environment,
MPs
undergo
abiotic
biotic
processes
which
alter
properties
integrity:
this
process
is
called
"aging"
implications
fate
these
contaminants,
morphology
surface
chemistry.
Aging
may
also
affect
analytical
assessment
samples:
samples
likely
contain
aged
MPs,
while
methods
are
generally
established
using
pristine
plastics
validation.
This
can
lead
uncertainties
quantification
characterization.
critical
review
summarizes
current
trends
simulation
characterization
MP
aging
laboratory
conditions,
highlighting
limitations
knowledge
gaps.
It
discusses
challenges
induced
by
samples,
providing
directions
toward
possible
solutions.
