Minerals,
Год журнала:
2024,
Номер
14(12), С. 1275 - 1275
Опубликована: Дек. 16, 2024
Geochemical
proxies
are
a
reliable
tool
in
deciphering
the
paleoenvironment
and
diagenetic
alteration
carbonate
rock
units.
The
Lower
Cretaceous
Yamama
Formation
(LCYF)
is
an
important
unit
of
Saudi
Arabia
region
which
has
been
studied
detail
to
evaluate
through
geochemical
studies.
This
study
presents
new
data
on
petrography,
stable
isotopes,
trace
rare-earth
elements
enhance
our
understanding
paleoenvironments,
redox
conditions,
paleosalinity
during
deposition
these
Field
studies
show
that
formation
composed
thick-to-thin-bedded
limestone.
Petrographic
mostly
mudstone,
wackestone,
packstone,
grainstone
facies.
isotopic
values
carbon
(δ13C
V-PDB
=
+0.58‰
+2.23‰)
oxygen
(δ18O
−6.38‰
−4.48‰)
directly
within
range
marine
signatures.
CaCO3’s
dominance
over
SiO2
Al2O3
indicates
minimal
detrital
contribution
LCYF
precipitation.
REE
pattern
suggests
coeval
signatures
include
(i)
slight
LREE
depletion
compared
HREEs
(av.
Nd/YbN
0.70),
(ii)
negative
Ce
anomalies
Ce/Ce*
0.5),
(iii)
positive
La
anomaly
La/La*
1.70).
Micritic
limestone
low
Hf
(bdl
0.4
µg/g),
Sc
2.5
Th
0.8
µg/g)
content,
negligible
influence.
content
different
facies
(Ce
1u.80
12.85
their
took
place
under
oxic
dysoxic
conditions.
However,
there
moderate
variation
MF-I,
with
higher
as
MF-II,
MF-III,
MF-IV,
MF-I
anoxic
Remote Sensing,
Год журнала:
2024,
Номер
16(17), С. 3221 - 3221
Опубликована: Авг. 30, 2024
Heavy
metal
contamination
in
soils
and
vegetation
poses
a
significant
problem
due
to
its
toxicity
persistence.
Toxic
effects
on
include
not
only
impaired
growth,
reduced
yields,
even
plant
death
but
also
biodiversity
loss
ecosystem
degradation.
Addressing
this
issue
requires
comprehensive
monitoring
remediation
efforts
mitigate
the
environmental,
human
health,
ecological
impacts.
This
review
examines
state-of-the-art
methodologies
advancements
remote
sensing
applications
for
detecting
heavy
soil
subsequent
vegetation.
By
synthesizing
current
research
findings
technological
developments,
offers
insights
into
efficacy
potential
of
terrestrial
ecosystems.
However,
studies
focus
regression
AI
methods
link
spectral
reflectances
indices
concentrations,
which
limited
transferability
other
areas,
times,
discretizations,
elements.
We
conclude
that
one
important
way
forward
is
more
thorough
understanding
simulation
related
physico-chemical
processes
plants
their
signatures.
would
offer
profound
basis
individual
circumstances
allow
disentangling
from
stressors
such
as
droughts
or
salinity.
Iranian Journal of Science and Technology Transactions of Civil Engineering,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 2, 2025
Abstract
Water
pollution
has
become
a
growing
threat
to
human
society
and
natural
ecosystems
in
recent
decades.
It
increases
the
need
understand
surface
water
quality
assessment
better
using
chemometric
tools
within
aquatic
systems.
This
study
sampled
of
21
parameters
at
multiple
sampling
points
Jabi
Lake
during
wet
dry
seasons
(August–December
2021)
various
statistical
methods
including
cluster
analysis,
principal
component
analysis/factorial
discriminant
box
plot
analysis.
These
samples
were
examined
for
physicochemical
employing
standard
techniques.
The
revealed
significant
seasonal
variations
quality.
During
season,
key
measurements
included
total
dissolved
solids
(100.40
mg/l),
oxygen
(13.72
electrical
conductivity
(97.14
µs/cm).
season
showed
higher
levels
most
parameters,
with
137.91
mg/l
230.93
µs/cm.
Statistical
analysis
identified
strong
correlations
between
notably
phosphate
hardness
(
r
=
0.978,
α
0.05)
pH
temperature
0.995,
0.05).
four
components
explaining
98.5–100%
variance,
representing
sources
organic
waste,
domestic
sewage,
factors.
findings
indicated
that
more
polluted,
some
exceeding
World
Health
Organisation
standards,
suggesting
potential
health
risks.
research
demonstrated
effectiveness
multivariate
techniques
analysing
complex
data
provided
valuable
insights
resource
management,
particularly
regarding
variations'
impact
on
Plants,
Год журнала:
2025,
Номер
14(4), С. 589 - 589
Опубликована: Фев. 14, 2025
The
aim
of
this
experiment
was
to
investigate
the
differences
in
uptake
and
accumulation
rare
earth
elements
(REEs)
between
selected
plant
species
substrates
used
(soil
with
increased
REE
content,
ash,
smelter
waste).
Eight
were
included
study:
common
yarrow
(Achillea
millefolium),
false
mayweed
(Triplerosperum
maritimum),
tall
fescue
(Festuca
arundinacea),
marigold
(Tagetes
sp.),
maize
(Zea
mays),
white
mustard
(Sinapis
alba),
red
clover
(Trifolium
pratense
L.),
autumn
fern
(Dryopteris
erythrosora).
study
focused
on
following
representatives:
lanthanum
(La),
cerium
(Ce),
europium
(Eu),
gadolinium
(Gd).
Plant
samples,
divided
into
roots
shoots,
analyzed
by
ICP-MS.
obtained
concentrations
tissues
ranged
from
9
697
µg
kg-1
10
1518
69
189
To
determine
ability
plants
phytoextract
REE,
two
factors
calculated:
translocation
factor
(TF)
bioconcentration
(BCF).
highest
TF
value
for
D.
erythrosora
growing
a
substrate
consisting
soil
content
(Gd,
=
4.03).
Additionally,
>
1
all
REEs
T.
L.
In
experiment,
BCF
lower
than
tested.
provided
insight
varying
accumulate
REEs,
depending
both
chemical
properties
substrate.
