In situ high-resolution insights into the dynamics of arsenic (As) species and heavy metals across the sediment-water interface in a deep karst reservoir
Journal of Hazardous Materials,
Год журнала:
2025,
Номер
490, С. 137775 - 137775
Опубликована: Фев. 26, 2025
Язык: Английский
Microbially Mediated Arsenic-Nitrogen Biogeochemical Coupling Across Vertical Distribution in Coastal Wetlands
Water,
Год журнала:
2025,
Номер
17(9), С. 1255 - 1255
Опубликована: Апрель 23, 2025
Few
studies
have
addressed
the
coupling
of
arsenic
(As)
and
nitrogen
(N)
geochemistry
in
natural
soil.
This
research
focused
on
vertical
distribution
behavior
As
N
coastal
wetland
sediments.
Pore
water
sediment
from
barren
wetlands
near
three
estuaries
(Guanhe
River,
Sheyang
Liangduo
River)
central
Jiangsu
Province
China
with
Spartina
alterniflora
(S.
alterniflora)
were
sampled,
which
analyzed
for
total
content
speciation
inorganic
fractions.
The
bacterial
community
was
investigated
through
16s
rDNA
sequencing;
diversity
indices
calculated.
change
trend
pore
surface
increasing
depth
opposite
to
that
NO3−,
possibly
because
NO3−
promoted
arsenite
(As(III))
oxidation
arsenate
(As(V)).
Increased
contents
seemed
mitigate
toxicity.
NH4+
indicated
anaerobic
ammonium
iron
(Fe)
reduce
Fe
oxides,
resulting
release,
especially
deeper
sediment.
High-throughput
sequencing
analysis
revealed
some
potential
bacteria
involved
As-N
geochemical
coupling,
such
as
Bacillus
Psychrobacter,
can
couple
denitrification
oxidation,
Sva1033,
may
favor
oxidation-induced
release.
Our
results
suggest
N-driven
As(III)
release
be
relevant
processes
emphasize
importance
microorganisms
processes.
deepens
our
understanding
wetlands,
providing
a
theoretical
basis
controlling
pollution.
Язык: Английский
Nitrogen, sulfur, iron, and microbial communities co-shape the seasonal biogeochemical behaviors of As and Sb in coastal tidal flat wetlands associated with rivers
Journal of Hazardous Materials,
Год журнала:
2024,
Номер
484, С. 136730 - 136730
Опубликована: Дек. 1, 2024
Язык: Английский
Fate of Arsenic in contaminated coastal soil induced by rising temperature and seawater intrusion
Marine Environmental Research,
Год журнала:
2024,
Номер
202, С. 106799 - 106799
Опубликована: Окт. 18, 2024
Язык: Английский
Rhizosphere microbial community structure and PICRUSt2 predicted metagenomes function in heavy metal contaminated sites: A case study of the Blesbokspruit wetland
The Science of The Total Environment,
Год журнала:
2024,
Номер
959, С. 178147 - 178147
Опубликована: Дек. 29, 2024
This
study
investigated
the
microbial
diversity
inhabiting
roots
(rhizosphere)
of
macrophytes
thriving
along
Blesbokspruit
wetland,
South
Africa's
least
conserved
Ramsar
site.
The
wetland
suffers
from
decades
pollution
mining
wastewater,
agriculture,
and
sewage.
current
focused
on
three
macrophytes:
Phragmites
australis
(common
reed),
Typha
capensis
(bulrush),
Eichhornia
crassipes
(water
hyacinth).
results
revealed
a
greater
abundance
microbes
(Bacteria
Fungi)
associated
with
free-floating
E.
compared
to
P.
T.
capensis.
Furthermore,
correlation
between
metals,
showed
strong
fungal
communities
metals
such
as
nickel
(Ni)
arsenic
(As),
while
bacterial
correlated
more
lead
(Pb)
chromium
(Cr).
functional
analysis
predicted
by
PICRUSt2
identified
genes
related
xenobiotic
degradation,
suggesting
potential
these
break
down
pollutants.
Moreover,
specific
groups
-
Proteobacteria,
Verrucomicrobia,
Cyanobacteria,
Bacteroidetes
were
linked
this
degradation
pathway.
These
findings
suggest
promising
avenue
for
microbe-assisted
phytoremediation,
technique
that
utilizes
plants
their
decontaminate
polluted
environments.
Язык: Английский