Frontiers in Microbiology,
Год журнала:
2024,
Номер
15
Опубликована: Ноя. 5, 2024
Harmful
algal
blooms
(HABs)
are
global
hazards
under
climate
change
and
eutrophication
conditions.
Modified
clay
(MC)
method
is
widely
used
to
control
HABs
in
Asian
American
coastal
waters.
However,
little
research
has
been
conducted
on
the
underlying
mechanisms
by
which
MC
controls
freshwater
environments.
Herein,
experiments
bioinformatics
analyses
were
for
MC-based
of
a
closed
water
body
with
an
area
approximately
240
m
2
Fuchun
River,
China.
Results
revealed
that
dominant
bloom
species
Microcystis
,
87.68–97.01%
removal
efficiency
whole
biomass
was
achieved
after
3
h
treatment.
The
weaker
zeta
potentials
hydrophilic
groups
such
as
O-H
P-O-P
extracellular
polymeric
substances
(EPS)
surrounding
cells
made
them
easier
be
flocculated
removed
particles,
relative
abundance
decreased
29.12%
Cyanobium
increased
40.97%.
Therefore,
changes
cyanobacterial
community
structure,
accompanied
elimination
sp.
apical
dominance
enhanced
competition
between
phytoplankton
community,
increasing
diversity.
Under
treatment,
residual
microorganisms,
including
cyanobacteria,
had
high
potential
DNA
damage
repair
more
likely
survive
being
subjected
oxidative
stress.
In
meanwhile,
genes
involved
genetic
information
processing,
signal
transduction,
photosynthesis
indicating
microbiome
week
proliferation
light
energy
harvesting.
destruction
colonies,
function
cyanobacteria
phycosphere
microbiome,
further
hindering
development.
These
findings
illustrate
can
regulate
optimize
microbial
structure
through
ecosystems.
Scientific Reports,
Год журнала:
2025,
Номер
15(1)
Опубликована: Янв. 29, 2025
Abstract
The
utilization
of
cyanobacteria
toxin-producing
blooms
for
metal
ions
adsorption
has
garnered
significant
attention
over
the
last
decade.
This
study
investigates
efficacy
dead
cells
from
Microcystis
aeruginosa
blooms,
collected
agricultural
drainage
water
reservoir,
in
removing
cadmium,
lead,
and
zinc
aqueous
solutions,
simultaneously
addressing
mitigation
M.
bloom.
Some
physical
characterization
biomass
was
performed,
including
scanning
electron
microscope
(SEM)
which
revealed
that,
form
a
dense,
amorphous
cluster,
energy-dispersive
X-ray
(EDX)
spectroscopy
confirmed
that
carbon,
oxygen,
nitrogen
are
predominant
elements
biomass,
Fourier
transformation
infrared
(FTIR)
identified
several
active
function
groups,
hydroxyl,
aliphatic
C–H
amide
I
II
bands,
carboxylate
carbonyl
(C=O).
Key
factors
influencing
process
were
examined.
Under
optimal
conditions—pH
6,
biosorbent
dose
0.3
g,
contact
time
90
min,
primary
level
100
mg/L
temperature
35
°C
(313K)—a
maximum
removal
efficiency
exceeding
90%
achieved.
Isothermal
analysis
Cd(II),
Pb(II),
Zn(II)
followed
Langmuir
isotherm
model
(R
2
=
0.96,
q
max
>
67
mg/g).
Kinetic
studies
indicated
pseudo-second-order
best
described
0.94
e
81.3
mg/g.),
suggesting
dominant
chemisorption
mechanism.
Thermodynamic
is
spontaneous
endothermic.
findings
highlight
potential
as
low-cost,
sustainable
heavy
wastewater
treatment
applications.
Ecological Indicators,
Год журнала:
2024,
Номер
163, С. 112100 - 112100
Опубликована: Май 8, 2024
The
alarming
increase
in
the
frequency
of
blooms
Microcystis
freshwater
lakes
and
reservoirs
occurs
worldwide,
with
major
implications
for
their
ecosystem
functioning
water
quality.
dominance
is
tightly
related
to
colonial
formation
by
Microcystis.
However,
studies
development
morphospecies
are
rare.
This
research
applied
FlowCAM-based
imaging
flow
cytometry
analyze
mesocosms
mimicking
eutrophic
shallow
effect
temperature
changes.
A
significant
positive
association
was
found
between
M.
ichtyoblabe,
aeruginosa,
smithii
colonies,
particularly
high-temperature
tanks,
suggesting
that
these
belong
one
ecocluster,
which
supports
hypothesis
central
transition
pathways
small
clusters
cells
represented
an
important
stage
sequence
bloom
were
associated
forms.
correlation
analysis
showed
higher
pH
positively
correlated
abundance
M.wesenbergii
independently
sheaths'
abundances
increased
following
a
maximum
abundance,
reaching
numbers
(thousands),
majority
sheaths
contained
at
least
some
cells.
We
hypothesize
may
be
crucial
spp.
dispersal
represent
obligatory
colonies
development.
protect
against
environmental
stress
factors,
improve
cell
survival
low
nutrient
levels,
participate
spreading.
Our
findings
can
applicable
early
CyanoHAB
detection
management
dispersal.
