Vestnik of Saint Petersburg University Earth Sciences,
Год журнала:
2023,
Номер
68(4)
Опубликована: Янв. 1, 2023
Speciation
of
ore
and
accompanying
elements
(Cu,
Zn,
Fe,
Ni,
Pb,
Cd,
Cr,
V,
Ba,
Sr)
in
steppe
soils
the
Transurals
(vicinity
city
Sibay,
Bashkortostan)
was
studied
with
sequential
extraction
method.
Attention
given
to
change
elements’
speciation
area
affected
by
mining
(Cu-Zn
deposit).
The
results
are
supplemented
chemical
analysis
humic
acids
(isolated
alkaline
extraction)
granulometric
fractions.
It
revealed
that
background
areas
characterized
low
mobility
a
relatively
uniform
distribution
over
soil
profile.
Residual
fraction
percentage
(fraction’s
share
element’s
total
content)
is
highest.
Percentage
exchangeable
carbonate
fractions
insignificant
(Sr
Ba
exceptions).
crystalline
Fe
hydroxides,
reduceable
oxidizable
varies
from
shares
percent
15%.
Cd
stands
out
for
high
(up
30%
residual
50%).
Comparison
obtained
allows
us
suggest
near
objects
industry
dust
enriched
Cu,
Pb
Sb
comes
surface.
This
leads
shard
increase
content
upper
layer
chernic
horizon,
these
among
Increase
not
only
due
prevailing
fraction;
fraction,
reducible
hydroxides
significantly
increase.
Sharp
(largely
sulfides)
noted.
Environmental Science and Pollution Research,
Год журнала:
2024,
Номер
31(24), С. 34817 - 34838
Опубликована: Май 13, 2024
The
purpose
of
this
review
was
to
survey
the
recent
applications
diffusive
gradients
in
thin
films
(DGT)
technique
assessment
mobility
and
bioavailability
nutrients
potentially
toxic
elements
(PTEs)
agricultural
soil.
Many
studies
compared
capabilities
DGT
with
those
classical
soil
chemical
extractants
used
single
or
sequential
procedures
predict
PTE
crops.
In
most
published
works,
reported
be
superior
conventional
extraction
fractionation
methods
obtaining
significant
correlations
metals
metalloids
accumulated
domain
nutrient
assessment,
DGT-based
focused
mainly
on
phosphorous
selenium
labile
fraction
measurement,
but
potassium,
manganese,
nitrogen
were
also
studied
using
tool.
Different
configurations
are
reported,
binding
layers
specific
for
certain
analytes
(Hg,
P,
Se)
gels
wider
applicability,
such
as
Chelex-based
metal
cations
ferrihydrite-based
hydrogels
oxyanions.
Overall,
literature
demonstrates
that
is
relevant
evaluation
crops,
due
its
capacity
mimic
plant
root
uptake
process,
which
justifies
future
improvement
efforts.
Environmental Research,
Год журнала:
2023,
Номер
236, С. 116759 - 116759
Опубликована: Июль 27, 2023
Despite
being
one
of
the
most
important
tropical
biomes
in
world,
Atrato
River
basin
has
experienced
a
critical
ecological
deterioration
due
to
gold
mining,
posing
significant
threat
wildlife
and
human
health.
In
this
study,
we
measured
concentrations
mercury
(Hg)
arsenic
(As)
sediments
at
various
swamps
within
basin.
Classical
indices
were
employed
assess
associated
health
risks
linked
exposure
these
elements.
The
Hg
As
ranged
between
0.09
0.23
mg/kg
0.59–2.68
mg/kg,
respectively.
highest
values
found
upstream
stations
impacted
by
mining
activities.
For
As,
levels
near
river
mouth
(except
for
station
B),
where
agricultural
practices
are
taken
place.
contamination
factor
(CF)
indicated
that
exhibited
moderate
depending
on
specific
sampling
area.
Conversely,
contaminant
load
index
(PLI)
suggested
level
ranging
from
basic
with
exception
A,
which
showed
progressive
site.
geoaccumulation
(Igeo)
moderately
contaminated
Hg,
while
showing
signs
increasing
As.
According
criteria
limiting
effect
(TEC),
exceeded
TEC
B
C,
indicating
potential
toxic
risk
aquatic
biota.
A
(PERI)
was
detected
all
stations,
except
classified
as
strong.
hazard
(HI),
used
non-carcinogenic
assessment,
adverse
effects
population,
particularly
children,
HI
exceeding
1.
However,
lifetime
cancer
(TLCR)
fell
acceptable
range
(1
×
10−6
1
10−4),
negligible
risk.
Oral
ingestion
inhalation
identified
two
primary
routes
concern.
This
study
serves
valuable
reference
assessment
regarding
exposures
environmental
matrices
may
not
pose
an
immediate
Geosciences,
Год журнала:
2025,
Номер
15(1), С. 31 - 31
Опубликована: Янв. 16, 2025
Soil,
geochemical,
microbiological,
and
archeological
studies
were
conducted
at
eight
settlements
dating
from
the
Paleolithic
to
Late
Medieval
Modern
Ages
near
southern
Trans-Urals
Mountains,
Russia.
The
forest-steppe
landscapes,
rivers,
abundant
mineral
resources
have
attracted
people
region
since
ancient
times.
Cultural
layers
(CLs)
are
marked
by
finds
of
ceramics
fragments,
animal
bones,
stone,
metal
tools.
properties
CLs
include
close-to-neutral
pH,
being
well
structured,
absence
salinity,
enrichment
with
exchangeable
calcium,
anthropogenic
phosphorus
(0.2–0.4%).
majority
start
a
depth
3–25
cm,
extend
40–60
contain
6–10%
organic
carbon
(Corg)
in
0–20
cm
layer,
reflecting
input
modern-day
processes.
At
Ishkulovo
site
(0.6–0.8
ka
BP),
Corg
decreases
1.3%
because
CL
is
below
80
fresh
material
input,
has
been
mineralized.
proximity
sites
deposits
copper,
chromium,
zinc,
manganese
Ural
Mountains
creates
natural
high-content
anomalies
region,
as
indicated
their
abundance
soils
parent
rocks.
In
past,
these
elements
also
released
into
products,
ceramic
raw
materials
used
manufacture.
quite
far
(18–60
km)
Magnitogorsk
Metallurgical
plant,
but
industrial
stockpiles
S
(technogenic
coefficient—Ct
30–87%),
and,
less
often,
Cr,
Mn,
Sr
(Ct
30–40%)
accumulated
surface
layers.
These
three
factors
led
concentration
pollutants
first
(arsenic,
lead,
zinc)
second
(cobalt,
nickel)
hazard
classes
CLs,
often
quantities
2–5
times
higher
than
values
for
geosphere
average
content
(“Clarke”
value),
more
allowable
human
health.
This
may
influenced
health
behavioral
functions.
Due
above
properties,
chernozems
high
buffering
capacity
strong
bond
heavy
metals.
Therefore,
no
inhibition
microbes
was
observed.
microbial
biomass
0–10
layer
high,
520–680
µg
C/g,
cause
emission
1.0
C-CO2
µg/g
soil
per
hour.
During
settlements’
development,
favorable
paleoclimate
noted
based
on
data
cited.
contributed
spread
productive
paleolandscapes,
ensuring
development
domestic
cattle
breeding
agriculture.
