Ecotoxicology and Environmental Safety,
Journal Year:
2023,
Volume and Issue:
251, P. 114533 - 114533
Published: Jan. 11, 2023
Microplastic
pollution
has
attracted
mounting
concerns
worldwide.
Microplastics
may
concentrate
organic
and
metallic
contaminants;
thus,
affecting
their
transport,
fate
organismal
exposure.
To
better
understand
contaminant-microplastic
interactions,
our
study
explored
the
sorption
of
selected
polychlorinated
biphenyls
(PCBs),
polybrominated
diphenyl
ethers
(PBDEs),
α-hexabromocyclododecane
(α-HBCDD),
organophosphate
flame
retardants
(OPFRs)
on
high-density
polyethylene
(HDPE)
polyvinylchloride
(PVC)
microplastics
under
saline
conditions.
Sorption
isotherms
determined
varied
between
chemicals
HDPE
PVC
microplastics.
Log
Freundlich
coefficients
(Log
KF)
for
targeted
ranged
from
2.01
to
5.27
L
kg-1
HDPE,
but
were
significantly
lower
PVC,
i.e.,
ranging
KF
data
(2.84
-
8.58
kg-1).
Significant
correlations
chemicals'
Kow
(octanol-water
partition
coefficient)
indicate
that
chemical-dependent
was
largely
influenced
by
hydrophobicity.
evaluated
using
three
size
classes
(<
53,
53
300,
300
1000
µm)
lab-fragmented
Particle
did
not
affect
isotherms,
time
reach
equilibrium
predicted
maximum
sorption,
likely
related
microplastic
surface
areas.
The
presence
biofilms
particles
enhanced
contaminant
capacity,
indicating
more
complex
dynamics
in
chemical-biofilm-microplastic
system.
Our
findings
offer
new
insights
into
chemical-microplastic
interactions
marine
environment.
