Environmental Engineering Research,
Год журнала:
2024,
Номер
30(4), С. 240322 - 0
Опубликована: Дек. 27, 2024
Coal
gangue
is
a
typical
industrial
waste,
which
will
bring
environmental
challenges
and
resource
depletion
when
piled
up
in
large
quantities,
heavy
metal
pollution
prominent
problem.
In
this
study,
Ca3(PO4)2
calcium
superphosphate
fertilizer
(CSF)
were
utilized
to
passivate
coal
at
different
levels,
its
passivation
mechanism
was
discussed.
The
results
show
that
both
CSF
can
effectively
reduce
moderate
or
high
levels
of
slight
clean
level.
effect
slightly
better
than
Ca3(PO4)2.
Through
characterization
before
after
simulation
with
Visual
MINTEQ
PHREEQC
software,
it
found
provide
PO32-,
while
releases
HPO3
–,
ionized
generate
more
finally
forms
insoluble
soluble
phosphate
metals.
Leaching
experiments
the
treated
samples
contain
obviously
stable
components,
leaching
risk
lower
untreated
gangue.
summary,
method
proves
effectiveness
fixing
metals
provides
an
effective
for
harmless
treatment
Communications in Soil Science and Plant Analysis,
Год журнала:
2025,
Номер
unknown, С. 1 - 13
Опубликована: Янв. 14, 2025
Biogeochemical
activity
of
trace
elements
in
the
environment
significantly
relies
on
their
chemical
speciation.
Solution
pH
influences
speciation
and
biogeochemical
soil-plant
continuum.
The
current
study
was
conducted
to
simulate
influence
solution
fractions
11
(arsenic,
lead,
zinc,
copper,
chromium,
cadmium,
mercury,
nickel,
strontium,
antimony,
selenium)
using
Visual
Minteq,
a
equilibrium
model
used
for
calculation
metal
speciation,
sorption
etc.
Results
delineated
that
pH-mediated
variations
differed
with
type.
results
revealed
dominance
element
species
at
acidic
(1–6),
neutral
(7.0),
alkaline
(8–14)
pH.
Divalent
(zinc,
lead)
were
dominant
However,
mercury
has
narrow
range
(1–3),
while
strontium
wider
(1–13).
Nitrate,
sulfate,
phosphate
also
occurred
<8.
>8,
existed
hydroxide
(OH)
fractions.
In
case
arsenic
(arsenite
As3+
arsenate
As5+),
selenium
(selenite
Se4+
selenate
Se6+),
antimony
(antimonite
Sb3+
antimonate
Sb5+),
get
oxidized
increasing
Multivariate
analysis
various
metals
as
function
Moreover,
Principal
Component
Analysis
verified
linear
relation
affects
phytoavailable
fraction
growth
culture
associated
health
hazards
through
transfer.
International Journal of Phytoremediation,
Год журнала:
2024,
Номер
26(8), С. 1243 - 1252
Опубликована: Янв. 24, 2024
There
are
scarce
data
regarding
the
effects
of
soil
amendments
on
biophysicochemical
responses
plants
at
early
stages
growth/germination.
This
study
critically
compares
ethylene-diamine-tetra-acetic-acid
(EDTA)
and
calcium
(Ca)
germinating
pea
seedlings
under
varied
arsenic
levels
(As,
25,
125,
250
µM).
Arsenic
alone
enhanced
hydrogen
peroxide
(H2O2)
level
in
roots
(176%)
shoot
(89%),
which
significantly
reduced
seed
germination
percentage,
pigment
contents,
growth
parameters.
Presence
EDTA
Ca
culture
minimized
toxic
As
seedlings,
being
more
pertinent
than
Ca.
Both
decreased
H2O2
tissues
(16%
13%
by
EDTA,
7%
shoot),
maintained
germination,
parameters
peas
close
to
those
control
treatment.
The
all
As-treatments
were
pronounced
shoot.
presence
organic
inorganic
can
play
a
useful
role
alleviating
toxicity
growth.
scarcity
demands
comparing
plant
different
(germinating
vs
mature)
future
studies.
