Environmental Technology & Innovation,
Год журнала:
2024,
Номер
35, С. 103648 - 103648
Опубликована: Апрель 27, 2024
Heavy
metal
(HM)
contamination
of
aquatic
ecosystems
has
increasingly
posed
threats
to
ecological
balance
and
health.
Analysis
sediments
determine
water
pollution
sources
is
widely
reported,
while
quantitative
research
about
the
effects
environmental
factors
on
distribution
HMs
relevant
microbial
communities
limited.
Here,
we
investigated
6
kinds
HM
characteristics
(As,
Cd,
Cr,
Cu,
Pb,
Zn)
Pearl
River
Delta
(PRD)
by
collecting
surface
sediment
samples
around
main
stream
estuary
explored
influencing
with
a
geographical
detector
method
(GDM).
The
shifts
in
corresponding
community
was
further
analyzed,
influence
mechanism
clearly
elucidated
using
partial
least
squares
path
modeling
(PLS-PM).
Results
showed
that
(i)
most
contents
greatly
exceeded
local
background
values,
wherein,
Cd
had
highest
level;
(ii)
temperature
considered
dominant
natural
factor
distribution,
except
for
an
degree
0.68–0.97;
(iii)
industrial
activity
significant
anthropogenic
electroplating
industry
source
Cu
Zn;
(iv)
network
analysis
revealed
As,
Cr
were
enriched
some
HM-tolerant
bacteria
(mainly
Chloroflexi,
Acidobacteriota
Proteobacteria),
heavy
induced
reduction
sensitive
bacterial
taxa;
(v)
PLS-PM
demonstrated
human
activities
largely
affect
causing
pollution.
This
study
could
provide
guidance
better
management
control
practices,
such
as
specific
governance
layout
optimization.
Soil and Sediment Contamination An International Journal,
Год журнала:
2024,
Номер
unknown, С. 1 - 17
Опубликована: Янв. 24, 2024
Gilgit
River
Basin
(GRB)
is
one
of
the
primary
fluvial
aquatic
systems
flowing
through
Gilgit-Baltistan
and
a
water
source
for
recreation,
fisheries,
irrigation,
drinking
to
more
than
1.8
million
people.
This
study
aimed
investigate
heavy
metals
(HM)
contamination
levels
in
sediments
GRB,
northern
Pakistan.
Fifty-five
samples
were
picked
from
various
sections
GRB
examined
HM
concentrations.
Fe
showed
maximum
average
concentration
27,743
mg/kg,
while
Cd
was
noted
with
minimum
1.06
mg/kg.
concentrations
within
world
river
system
guidelines
except
Cd,
which
also
surpassed
sediment
quality
set
by
USEPA.
used
geospatial
ecotoxicological
risk
indices.
Geospatial
analyses
higher
Ishkomen
GRB.
low
moderate
exposed
ecosystems.
Statistical
apportionment
suggesting
major
contribution
natural
activities.
recommends
seasonal
variation
studies
Environmental Technology & Innovation,
Год журнала:
2023,
Номер
30, С. 103076 - 103076
Опубликована: Фев. 22, 2023
Excessive
accumulation
of
heavy
metals
(HMs)
in
sediments
poses
significant
threats
to
the
aquatic
ecosystems.
This
study
comprehensively
determined
spatial
distribution,
sources,
and
ecological
risks
eight
HMs
85
surface
lower
reach
estuary
Yangtze
River
(YR),
third
longest
river
world.
Our
results
revealed
that
mean
concentrations
As,
Cd,
Cr,
Cu,
Hg,
Ni,
Pb,
Zn
were
11.32,
0.57,
87.31,
37.39,
0.10,
34.97,
32.27,
108.38
mg
kg
−1,
respectively.
The
contamination
assessment
Cd
Hg
significantly
higher
than
other
HMs.
had
a
variation,
with
concentration
riverine
estuarine
sediments.
source
apportionment
anthropogenic
activities
highest
contribution
occurrence
(78.53%),
including
industrial
activities,
shipping
transportation,
agricultural
production.
area
risk
because
its
dense
industrialization.
Besides,
large
diffusion
into
ocean
also
substantially
reduced
Altogether,
our
findings
provide
better
understanding
causes
sediment
HM
contamination.
Hence,
this
work
can
be
used
as
guide
help
government
efficiently
prevent
control
similar
areas.
Designed Monomers & Polymers,
Год журнала:
2024,
Номер
28(1), С. 1 - 34
Опубликована: Дек. 31, 2024
This
review
paper
analyzes
recent
advancements
in
bio-polymer
coatings
for
probiotic
microencapsulation,
with
a
particular
emphasis
on
chitosan
and
its
synergistic
combinations
other
materials.
Probiotic
microencapsulation
is
essential
protecting
probiotics
from
environmental
stresses,
enhancing
their
stability,
ensuring
effective
delivery
to
the
gut.
The
begins
an
overview
of
highlighting
significance
safeguarding
through
processing,
storage,
gastrointestinal
transit.
Advances
chitosan-based
encapsulation
are
explored,
including
integration
bio-polymers
such
as
alginate,
gelatin,
pectin,
well
application
nanotechnology
innovative
techniques
like
spray
drying
layer-by-layer
assembly.
Detailed
mechanistic
insights
integrated,
illustrating
how
influences
gut
microbiota
by
promoting
beneficial
bacteria
suppressing
pathogens,
thus
role
prebiotic
or
synbiotic.
Furthermore,
delves
into
chitosan's
immunomodulatory
effects,
particularly
context
inflammatory
bowel
disease
(IBD)
autoimmune
diseases,
describing
immune
signaling
pathways
influenced
linking
changes
improvements
systemic
immunity.
Recent
clinical
trials
human
studies
assessing
efficacy
chitosan-coated
presented,
alongside
discussion
practical
applications
comparison
vitro
vivo
findings
highlight
real-world
relevance.
sustainability
sources
impact
addressed,
along
novel
concept
gut-brain
axis.
Finally,
emphasizes
future
research
needs,
development
personalized
therapies
exploration
techniques.
