Insights into remediation of cadmium and lead contaminated-soil by Fe-Mn modified biochar
shengfeng Yang,
Qingchao Xiao,
Bin Li
и другие.
Journal of environmental chemical engineering,
Год журнала:
2024,
Номер
12(3), С. 112771 - 112771
Опубликована: Апрель 13, 2024
Язык: Английский
Effect of Soil Aging on Cadmium Bioavailability and Bioaccessibility at a Contaminated Site
Environments,
Год журнала:
2023,
Номер
10(6), С. 105 - 105
Опубликована: Июнь 20, 2023
The
effect
of
aging
on
cadmium
(Cd)
bioavailability
and
bioaccessibility
was
investigated
in
naturally
aged
field
soil
within
a
contaminated
site.
results,
which
are
based
comparison
investigations
carried
out
2018
2022
the
same
samples,
provide
realistic
evaluation
variation
Cd
chemical
forms
due
to
long-term
aging.
data
obtained
show
significant
reduction
(from
approximately
30%
60%)
mobile
bioavailable
cadmium,
while
total
quantity
did
not
change
significantly.
fractions
is
also
reflected
amount
metal
absorbed
by
plants.
On
one
hand,
this
indicates
potential
contamination
food
chain,
other,
it
highlights
limitations
use
phytoextraction
as
clean-up
technology
specific
In
case
under
study,
should
be
noted
that
there
no
decrease
over
time,
remained
very
high
even
after
four
years
soil,
about
60%
content
most
samples.
This
health
risks
related
incidental
ingestion
Cd-contaminated
could
become
main
exposure
route
final
site
park
or
public
green
area.
Язык: Английский
Assessments of Heavy Metals Accumulation, Bioavailability, Mobility, and Toxicity in Serpentine Soils
Sustainability,
Год журнала:
2023,
Номер
15(2), С. 1218 - 1218
Опубликована: Янв. 9, 2023
Accumulation
of
heavy
metals
is
a
concerning
issue
due
to
their
known
persistence
in
the
ecosystem,
and
there
are
standard
limits
established
for
maximum
allowable
concentrations
soils.
However,
metal
accumulation
coming
from
serpentinite
soils
often
exceeds
regulatory
values,
lack
knowledge
regarding
bioavailability,
mobility,
toxicity
environment.
This
research
applied
novel
selective
sequential
extraction
leaching
procedures
assess
gaps
on
topsoil
derived
few
states
Peninsular
Malaysia.
Based
total
digestion
method,
concentration
all
studied
except
Mn
exceeded
site
screening
levels
issued
by
Department
Environment,
Malaysia
(DOEM).
The
Geo-accumulation
Index
categorized
Cr,
Cd,
Ni,
Co
as
extreme
contamination
Cu,
Pb,
Zn,
unpolluted
moderate
contamination.
From
results,
Cd
was
found
bounded
100%
residual
fraction.
Meanwhile,
Co,
Cr
were
mostly
(≥92%)
be
bound
fraction,
with
remaining
percentages
distributed
within
non-bioavailable
fractions
(crystalline
Fe
oxides,
poorly
crystalline
oxides).
Nevertheless,
contaminants
showed
an
increase
(1–9%)
bioavailability
mobility
(soluble–exchangeable,
surface-adsorbed,
organic
matter)
which
pose
threat
greatly
surpassed
DOEM
standards;
however,
it
still
below
global
USEPA
control.
concluded
that,
even
though
level
topsoils
had
not
limit,
needs
addressed
its
high
being
potentially
bioavailable
mobile
Язык: Английский