The Science of The Total Environment,
Journal Year:
2023,
Volume and Issue:
891, P. 164068 - 164068
Published: May 24, 2023
Microplastics
have
been
reported
in
wastewater
treatment
works
across
the
world.
The
majority
of
microplastics
are
removed
during
process,
with
removal
efficiencies
between
57
%
to
99
%.
What
happens
from
wastewater,
and
how
they
accumulate
sewage
sludge
biosolids
(by-products
process),
remains
a
topic
high
interest.
Here
we
systematically
reviewed
current
state
knowledge
on
presence,
concentration,
characteristics
globally
understand
may
act
as
pathway
for
microplastic
pollution
soils.
A
systematic
search
was
performed
Web
Science
Direct
databases.
Sixty-five
studies
reporting
biosolid
products
were
identified,
spanning
twenty-five
countries.
Reported
concentrations
varied
considerably
0.193
microplastics/g
1.69
×
105
median
concentration
22.41
microplastics/g,
illustrating
many
captured
retained
sludge.
extent
which
recycling
pollutes
terrestrial
environment
compared
High
numbers
estimated
reach
fields
via
application
wide
variation
8.2
1010
1.29
1015
microplastics/year
sixteen
countries,
although
there
no
significant
difference
history
applications
control
fields.
comparative
risk
this
delivery
approx.
0.4
6430
tonnes
poses
environmental
benefits
nutrient
carbon
associated
reuse,
or
other
sources
global
research
imperative.
next
step
scientific
needs
focus
solutions
circular
economy
conundrum
-
valuable
source
nutrients
but
contain
microplastics,
ultimately
entering
environment.
Microplastics and Nanoplastics,
Journal Year:
2022,
Volume and Issue:
2(1)
Published: July 2, 2022
Abstract
To
assess
the
potential
risk
of
microplastic
exposure
to
humans
and
aquatic
ecosystems,
reliable
toxicity
data
is
needed.
This
includes
a
more
complete
foundational
understanding
better
characterization
hazards
they
may
present.
expand
this
understanding,
an
international
group
experts
was
convened
in
2020–2021
identify
critical
thresholds
at
which
microplastics
found
drinking
ambient
waters
present
health
organisms.
However,
their
findings
were
limited
by
notable
gaps
literature.
Here,
we
those
shortcomings
describe
four
categories
research
recommendations
needed
address
them:
1)
adequate
particle
selection
for
testing;
2)
appropriate
experimental
study
designs
that
allow
derivation
dose-response
curves;
3)
establishment
adverse
outcome
pathways
microplastics;
4)
clearer
exposure,
particularly
human
health.
By
addressing
these
gaps,
researchers
will
gain
key
drivers
concentrations
effects
occur,
allowing
might
pose
ecosystems.
Water Research,
Journal Year:
2023,
Volume and Issue:
232, P. 119707 - 119707
Published: Feb. 5, 2023
Microplastics
(MPs)
are
one
of
the
most
widespread
contaminants
worldwide,
yet
their
risks
for
freshwater
ecosystems
have
seldom
been
investigated.
In
this
study,
we
performed
a
large
monitoring
campaign
to
assess
presence
and
MPs
in
Amazonian
ecosystems.
We
investigated
MP
pollution
40
samples
collected
along
1500
km
Brazilian
Amazon,
including
Amazon
River,
three
major
tributaries,
several
streams
next
important
urban
areas.
55-5000
µm
size
range
were
characterized
(size,
shape,
color)
by
microscopy
identified
(polymer
composition)
infrared
spectroscopy.
Ecotoxicological
assessed
using
chronic
Species
Sensitivity
Distributions
effects
triggered
food
dilution
tissue
translocation
data
alignment
methods
that
correct
polydispersity
environmental
bioaccessibility.
This
study
shows
ubiquitous
ecosystems,
with
measured
concentrations
(55-5000
µm)
ranging
between
5
152
MPs/m3
River
its
main
23
74,550
streams.
The
calculated
Hazardous
Concentration
5%
species
(HC5)
derived
from
SSDs
entire
(1-5000
1.6
×
107
(95%
CI:
1.2
106
-
4.0
108)
dilution,
1.8
1.5
4.3
translocation.
Rescaled
exposure
tributaries
ranged
6.0
103
105
MPs/m3,
significantly
lower
than
HC5
values.
1.7
5.7
108
exceeded
both
values
20%
locations.
ecological
impacts
contamination
not
likely
happen
tributaries.
However,
organisms
may
be
expected
near
densely
populated
areas,
such
as
cities
Manaus
or
Belem,
which
limited
wastewater
treatment
facilities.
The Science of The Total Environment,
Journal Year:
2023,
Volume and Issue:
891, P. 164068 - 164068
Published: May 24, 2023
Microplastics
have
been
reported
in
wastewater
treatment
works
across
the
world.
The
majority
of
microplastics
are
removed
during
process,
with
removal
efficiencies
between
57
%
to
99
%.
What
happens
from
wastewater,
and
how
they
accumulate
sewage
sludge
biosolids
(by-products
process),
remains
a
topic
high
interest.
Here
we
systematically
reviewed
current
state
knowledge
on
presence,
concentration,
characteristics
globally
understand
may
act
as
pathway
for
microplastic
pollution
soils.
A
systematic
search
was
performed
Web
Science
Direct
databases.
Sixty-five
studies
reporting
biosolid
products
were
identified,
spanning
twenty-five
countries.
Reported
concentrations
varied
considerably
0.193
microplastics/g
1.69
×
105
median
concentration
22.41
microplastics/g,
illustrating
many
captured
retained
sludge.
extent
which
recycling
pollutes
terrestrial
environment
compared
High
numbers
estimated
reach
fields
via
application
wide
variation
8.2
1010
1.29
1015
microplastics/year
sixteen
countries,
although
there
no
significant
difference
history
applications
control
fields.
comparative
risk
this
delivery
approx.
0.4
6430
tonnes
poses
environmental
benefits
nutrient
carbon
associated
reuse,
or
other
sources
global
research
imperative.
next
step
scientific
needs
focus
solutions
circular
economy
conundrum
-
valuable
source
nutrients
but
contain
microplastics,
ultimately
entering
environment.
