Ecotoxicological impact of deactivated asbestos-cement on soil ecosystems
Waste Management,
Journal Year:
2025,
Volume and Issue:
202, P. 114825 - 114825
Published: April 24, 2025
The
effects
of
thermally
deactivated
asbestos
cement
(DAC)
on
the
soil
ecosystem
were
evaluated
using
model
organism
Folsomia
candida
(Collembola).
Two
materials
obtained
by
treating
slates,
commonly
used
for
roofing,
at
1100
°C
under
oxidizing
conditions
(Red
DAC)
and
1150
reducing
(Green
DAC).
Ten
age-synchronized
juveniles
F.
exposed
to
DAC
powder:soil
mixtures
in
ratios
1:1
1:10
both
types.
After
28
days,
adults
counted
assess
treatment
effects.
results
indicate
distinct
toxicity
profiles.
Red
powder
did
not
induce
adult
lethality
tested
concentrations;
however,
a
significant
reduction
juvenile
production
was
observed
higher
concentration
(1:1).
In
contrast,
Green
caused
concentration,
with
no
produced.
Both
contain
high
percentage
silica
glass
(∼40%
weight),
well-known
insect
dehydration
agent
mechanical
insecticide.
At
highest
may
cause
detrimental
juveniles,
which
are
more
sensitive
than
adults.
also
contains
8.5%
lime
(CaO),
an
antimicrobial
insecticidal
that
can
disrupt
pH.
combination
silica-induced
lime-mediated
alkalinity
account
lethal
These
findings
reinforce
need
proper
recycling.
While
deactivation
effectively
eliminates
its
hazard
built
environment,
improper
disposal
or
contamination
pose
ecological
risks.
Recycling
into
stable
matrices,
such
as
ceramics
mortar,
minimizes
environmental
while
promoting
circular
economy.
Language: Английский
Locomotion (behavioural) test in the terrestrial oligochaetes Eisenia exposed to carbamate model substance
Ecotoxicology,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 15, 2025
Abstract
This
study
examines
earthworm
behaviour
by
combining
locomotion-based
motility
assessments
with
evaluations
of
acetylcholinesterase
(AChE)
inhibition.
Motility
analysis
revealed
significant
differences
in
the
two-dimensional
movement
patterns
earthworms
exposed
to
carbamate
pesticides
compared
those
control
group,
indicating
altered
trajectories.
AChE
assays
demonstrated
a
pronounced
inhibitory
effect
on
enzyme
activity
relative
unexposed
individuals.
Both
univariate
and
multivariate
analyses
confirmed
that
pesticide
contaminant
significantly
affects
as
well
quantitative
directional
characteristics
movement.
These
results
suggest
behavioural
testing
is
valuable
tool
for
understanding
impact
non-target
organisms
environment.
Language: Английский