The
majority
of
the
world
populations
continue
to
be
exposed
nitrate
through
food
(leafy
vegetables)
that
are
major
source
dietary
intake.
High
levels
contents
in
vegetables
have
been
a
significant
health
issue
all
over
world.
However,
limited
information
is
available
on
dynamics
water-substrate-plant
system
and
its
distribution
edible
organs.
In
our
study,
uptake
accumulation
(roots,
stem,
aerial
fraction
leaves)
chard
spinach
were
evaluated
under
greenhouse
conditions
with
optimal
fertilization
(in
triplicate).
Results
showed
low
leachates
substrates
(chard
˃
spinach).
Higher
concentrations
root
zone
(spinach)
correlated
higher
rate
fraction,
leaves
compared
(p
<
0.0001).
concentration
exceeded
3-fold
international
regulation
(3500
mg
NO3-
kg-1).
acceptable
daily
intake
(ADI)
value
was
almost
age
groups
(except
13–19
years).
group
(1–2
years)
EDI
(7.87
kg-1)
two
times
than
ADI.
This
study
shows
leafy
accumulate
(spinach
chard)
from
nutrient
solution,
posing
plausible
human
risk
different
group.
Production
systems
appropriate
programs
for
each
crop
type
should
promoted
reduce
input
into
cropping
systems.
Abstract.
In
urban
and
industrialized
areas,
soil
contamination
degradation
caused
by
the
deposition
of
industrial
dusts
may
pose
significant
health
environmental
risks.
This
problem
relates
to
vertical
mobility
bioavailability
Potentially
Toxic
Elements
(PTE).
study
investigates
fate
PTE
brought
in
soils
located
Dunkerque
agglomeration,
one
most
areas
France.
Four
short
cores
were
collected
city
Gravelines
(Dunkerque
agglomeration)
following
a
gradient
from
emitters
site.
The
cut
into
discrete
1-cm-sections
their
concentrations
(using
ICP-AES/MS
analyses).
Single
HCl
extraction
was
performed
evaluate
discuss
specific
behavior
according
current
parameters.
For
this
purpose,
main
parameters
identified
(grain-size
distribution,
mineralogy,
pH,
CEC,
TOC,
calcium
carbonates
water
contents)
addition
chemical
composition
(XRF,
studied
revealed
globally
low
absorbent
capacities
for
pollutants
(CEC
averaging
5.3
meq/100g),
partially
counterbalanced
buffering
effect
(contents
ranging
8
%
30
%).
We
highlighted
minor
(1<EF<3)
moderately
severe
(5<EF<10)
Enrichment
Factors
(Cr,
Ni,
Mo,
Mn,
Cd,
Zn),
first
3
centimeters
near
emitters.
profiles
these
are
concordant
with
atmospheric
inputs
metallurgical
dust.
Using
relatively
strong
leaching
reagent
(HCl
1M),
we
estimated
Cr,
Ni
Mo
(average
leached
ratios
<25
%)
soils,
suggesting
that
mainly
occur
refractory
phases
(natural
or
anthropogenic).
Cd
Zn,
related
and/or
sources,
present
higher
>
60
Mn
44
Zn).
Our
points
out
stability
under
physicochemical
conditions
(calcareous
slightly
basic
pH
7.8).
context,
monitoring
is
highly
recommended,
considering
(1)
presence
allotment
gardens
vicinity
(2)
potential
evolution
as
result
increased
flooding
events.
The
intermediate
product
methylarsenite
[MMA(III)]
of
arsenic
(As)
methylation
can
be
methylated
to
dimethylarsenate
(DMA),
which
causes
rice
straighthead
disease
via
the
As
enzyme
(ArsM),
demethylated
arsenite
demethylation
(ArsI),
or
excreted
from
cells
MMA(III)
efflux
(ArsP).
Whereas
is
commonly
reported
in
flooded
soils,
mostly
mediated
by
aerobes.
We
used
custom-built
ROCker
models
(accuracies
99.7–99.9%)
quantify
short-read
sequences
carrying
genes
and
investigate
variations
transcriptional
activity
arsM,
arsI,
arsP
nonflooded
paddy
soils.
revealed
significantly
(p
<
0.05)
greater
arsM
than
whereas
arsI
was
comparable.
soils
possibly
coupled
with
denitrification,
as
positively
correlated
terms
activity.
Moreover,
we
showed
that
microbes
coexpressing
were
dominated
Actinomycetota
Pseudomonadota.
This
study
sheds
light
on
active
microbial
communities
involved
provides
insights
into
prevention
disease.
Chemosensors,
Journal Year:
2025,
Volume and Issue:
13(2), P. 62 - 62
Published: Feb. 9, 2025
This
study
investigated
the
morphological
dependence
of
ZnO
nanostructures,
specifically
nanotube-
and
nanorod-based
electrodes,
on
their
electrochemical
performance
for
detection
lead
ions
(Pb2⁺)
in
aqueous
solutions.
The
results
demonstrate
that
nanotubes
exhibit
significantly
enhanced
sensitivity
compared
to
nanorods
during
CV
measurements.
During
SWV
measurements,
(116.79
mA·mM−1)
a
lower
limit
0.0437
μM
were
determined.
hollow,
high-aspect-ratio
structure
provides
larger
active
surface
area
facilitates
better
ion
accessibility,
resulting
superior
electron
transfer
efficiency
catalytic
activity.
These
underscore
critical
role
morphology
optimizing
ZnO-based
sensors.
Analysis
real
water
samples
from
various
natural
reservoirs
revealed
no
detectable
lead,
while
was
identified
exclusively
artificially
prepared
containing
exposed
hunting
shot.
Over
30-day
period,
sensor
retained
over
95%
its
initial
when
stored
under
vacuum
conditions,
demonstrating
minimal
signal
degradation.
Under
ambient
stability
loss
attributed
moisture
adsorption
porous
nanostructure.
also
displayed
outstanding
reproducibility,
with
current
response
variations
across
multiple
probes
remaining
within
4%.
cost-effective
simple
fabrication
process
nanostructures
further
highlights
potential
scalable
production,
environmental
monitoring,
integration
into
portable
sensing
devices.
