ACS ES&T Water,
Год журнала:
2024,
Номер
4(11), С. 4943 - 4957
Опубликована: Окт. 25, 2024
This
research
focuses
on
Nansi
Lake,
an
important
regulating
reservoir
in
China's
South-to-North
Water
Diversion
Project.
It
studies
the
natural
decay
process
of
five
major
hydrophytes
lake
and
analyzes
impact
this
water
quality.
The
results
show
that
patterns
plants
are
similar,
each
being
divided
into
three
stages.
In
initial
stage,
easily
decomposable
organic
matter
rapidly
breaks
down,
releasing
large
amounts
nitrogen
phosphorus
overlying
water,
quickly
consuming
dissolved
oxygen
significantly
lowering
pH.
middle
decomposition
rate
slows
content
gradually
decreases
while
pH
slowly
rise.
final
within
is
completely
consumed,
leaving
primarily
lignin,
concentrations
various
substances
stabilize,
reaching
a
steady
state.
Additionally,
study
establishes
Monod-type
kinetic
model
to
simulate
changes
ammonia
during
process.
By
adjusting
parameters
K1,
K2,
K3,
we
obtained
fitted
curves
consistent
with
data
trends
for
plants.
helps
understand
plant
quality
Lake
provides
basis
disposal
strategies
management
across
different
seasons
Lake.
Water,
Год журнала:
2025,
Номер
17(2), С. 135 - 135
Опубликована: Янв. 7, 2025
The
decomposition
of
submerged
plants
is
an
important
factor
affecting
water
quality
and
microbial
community
structure
aquatic
ecosystems.
This
study
aims
to
investigate
the
effects
process
V.
spinulosa
Yan
residues
on
receiving
under
different
conditions,
including
biomass
weight,
sediment
component,
living
Yan.
results
showed
that
optimal
for
was
0.3
g/L.
sand–soil
mixture
(3:7)
lowest
rate
(90.4%)
due
poor
moisture
retention
sand
lack
organic
matter
minerals,
which
slowed
down
process.
N
P
could
be
released
into
rapidly
through
decomposing
residues,
concentrations
TP,
TN,
PO43−-P
were
positively
correlated
with
residues.
decrease
in
TN
TP
observed
bioceramic
Fe-C
ceramic
partly
their
porous
structures
promoting
attachment
adsorption
P,
possibly
also
increase
Firmicutes.
After
planting
Yan,
concentrations,
as
well
dissolved
oxygen
levels,
lower
groups
compared
those
control
group
without
suggests
effectively
purifies
by
absorbing
nutrients
nitrification–denitrification
processes.
These
differences
underscore
active
role
nutrient
removal.
provides
a
scientific
basis
management
plants.
Environmental Science & Technology,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 6, 2025
Greenhouse
gas
emissions
and
water
quality
decline
are
two
major
issues
currently
affecting
lakes
worldwide.
Determining
how
to
control
both
greenhouse
is
a
long-term
challenge.
We
compiled
data
on
the
annual
average
carbon
dioxide
(CO2)
flux
parameters
for
422
global
lakes,
revealing
that
82.42%
of
act
as
sources
66.56%
have
experienced
deterioration.
Carbon
eutrophication
trends
were
observed
from
1990s
2020s,
with
further
deterioration
expected
over
next
80
years.
Unmanaged
land
use
change
in
lake
watersheds
could
exacerbate
CO2
into
degradation.
In
this
study,
watershed
planning
(WLUP)
framework
was
established,
24.83%
reduction
water,
5.07%
chlorophyll
(Chl-a),
4.70%
total
phosphorus,
12.92%
increase
Secchi
depth
achieved.
The
WLUP
identifies
Asia
Europe
regions
experiencing
greatest
demands
transformation,
where
optimization
leads
most
significant
improvements.
Metagenomic
analysis
revealed
forests
enhance
fixation
grasslands
reduce
degradation
phosphorus
metabolism
watersheds,
explaining
supporting
possibility
WLUP.
This
work
provides
win-win
solution
improving
fluxes
mitigate
effects
climate
promote
protection.
