Chemosensors,
Год журнала:
2023,
Номер
11(10), С. 547 - 547
Опубликована: Окт. 22, 2023
This
study
aims
to
introduce
a
fluorescence-based
chemosensing
method
for
Zn2+
in
aqueous
suspensions
and
untreated
surface
waters,
conditions
which
generally
hinder
the
application
of
conventional
optochemical
sensing
platforms.
A
macrocyclic
fluoroionophore
was
covalently
bonded
silica-coated
magnetic
nanoparticle
applied
according
predetermined
protocol
analyzing
trace
amounts
under
rarely
investigated
conditions.
Utilizing
reversible
complexation
immobilized
fluoroionophore,
rapid
regeneration
carried
out
via
simple
acidification
after
magnetic-assisted
solid-phase
extraction
particles.
Forming
inclusion
complexes
with
receptor
units
particles
leads
significant
enhancement
fluorescence
intensity
at
370
nm,
above
detection
limit
5
ppb,
dynamic
linear
range
quantification
15–3000
ppb
pH
5.5–7.5.
Practical
applicability
confirmed
by
river
water
an
suspension
pumpkin
seed
flour
as
real
relevant
heterogeneous
multicomponent
samples
sample
composition
natural
content.
Our
practical
approach
broaden
platforms
Zn2+.
Water,
Год журнала:
2025,
Номер
17(2), С. 224 - 224
Опубликована: Янв. 15, 2025
Due
to
the
intense
human
activities
and
rapid
development
of
economy,
dissolved
heavy
metals
(DHMs)
pose
a
significant
threat
urban
river
ecosystems.
Therefore,
distribution,
sources,
potential
risks
DHMs
in
Chaobai
River
(typical
river)
were
investigated
via
ICP-MS
detail.
Results
revealed
considerable
spatial
heterogeneity
with
various
concentrations
from
upper
lower
reach.
Principal
component
analysis
(PCA)
that
V,
Ni,
As,
Mo,
Pb
mainly
originated
mixing
process
industrial
input
natural
process,
Cr
Cu
derived
activities,
Zn
was
influenced
by
agriculture
activities.
Furthermore,
land
use
types
within
buffer
zone
near
sampling
points
innovatively
analyzed,
revealing
strong
correlations
between
regional
patterns.
Monte
Carlo
simulations
employed
assess
differentiated
non-carcinogenic
carcinogenic
associated
across
four
age
groups.
This
study
provided
scientific
references
for
sustainable
management
rivers
aquatic
systems
such
megacity
region.
Frontiers in Ecology and Evolution,
Год журнала:
2025,
Номер
12
Опубликована: Янв. 8, 2025
Rivers
are
critical
to
ecological
and
societal
sustainability,
yet
human
activities
like
urbanization,
industrialization,
agricultural
runoff
increasingly
threaten
their
health.
This
study
investigates
the
health
of
six
major
rivers
in
Dalian
City,
China,
focusing
on
relationships
between
aquatic
biological
communities
environmental
factors.
A
total
168
phytoplankton
species,
110
zooplankton
102
macrozoobenthos
species
were
identified.
The
key
factors
influencing
these
included
pH,
dissolved
oxygen,
ammonium
nitrogen,
phosphorus,
altitude.
Using
an
entropy-weighted
set
pair
analysis
model,
spatial
variations
river
ecosystem
evaluated.
Monitoring
sites
S12
S15
exhibited
good
conditions,
while
S4,
S8,
S17
rated
as
poor
(Grade
IV),
S7
was
severely
polluted
V).
Other
showed
borderline
III).
research
provides
valuable
insights
for
improving
management
biodiversity
conservation
offering
a
scientific
basis
addressing
water
quality
challenges.
