Research Square (Research Square),
Год журнала:
2023,
Номер
unknown
Опубликована: Сен. 26, 2023
Abstract
The
ubiquitous
proximity
of
the
commonly
used
microplastic
(MP)
particles
particularly
polyethylene
(PE),
polypropylene
(PP),
and
polystyrene
(PS)
poses
a
serious
threat
to
environment,
human
health
globally.
Biological
treatment
as
an
environment-friendly
approach
MPs
pollution
has
recent
interest
when
bio-agent
beneficial
functions
in
their
ecosystem.
This
study
aimed
utilize
floc-forming
bacteria
B.
cereus
SHBF2
isolated
from
aquaculture
farm
reducing
(PE,
PP,
PS)
environment.
were
inoculated
for
60
days
media
containing
sole
carbon
source.
On
different
incubation
(DOI),
bacterial
growth
analysis
was
monitored
harvested
examine
weight
loss,
surface
changes,
alterations
chemical
properties.
After
DOI,
highest
loss
recorded
PE,
6.87
±
0.92%,
which
further
evaluated
daily
reduction
rate
(k),
0.00118
gday
−
1
,
half-life
(t
1/2
),
605.08
138.52
days.
OD
value
(1.38
0.18
Abs.)
indicated
higher
efficiency
PE
utilization,
whereas
colony-forming
unit
showed
growing
at
while
utilizing
PP
(1.04
×
10
11
CFU/mL).
Biofilm
formation,
erosions,
cracks,
fragments
evident
changes
observed
using
scanning
electron
microscopy
(SEM)
resulted
formation
carbonyl
alcohol
group
due
oxidation
hydrolysis
confirmed
Fourier
transform
infrared
spectroscopic
(FTIR)
analysis.
results
degree
biodegradation
all
selected
types.
Thus,
this
revealed
that
bacteria,
high
potential
be
effective
degrading
bacteria.
The
use
of
artificial
substrates
and
biofloc
technology
can
favor
fish
culture
improve
water
quality.
aim
this
study
was
to
evaluate
whether
carbon
source
additions
modify
the
microbial
activity
bodies.
diversity
structure
microflora
in
after
adding
sources
ponds
were
analyzed
using
high-throughput
sequencing
based
on
V3-V4
region
16S
rRNA
genes.
results
showed
that
there
no
difference
richness
intestinal
between
control
experimental
groups.
Principal
coordinate
analysis
(PCoA)
nonmetric
multidimensional
scaling
(NMDS)
substrate
addition
changed
microflora.
a
linear
discriminant
(LDA)
effect
size
(LefSe)
indicated
11
biomarkers
EGˍst
group.
Spearman
correlation
heatmap
environmental
factors
affected
bacterial
communities,
redundancy
chemical
oxygen
demand
critical
factor
controlling
communities
water.
These
provide
an
understanding
community
composition
Research Square (Research Square),
Год журнала:
2024,
Номер
unknown
Опубликована: Янв. 10, 2024
Abstract
The
ubiquitous
proximity
of
the
commonly
used
microplastic
(MP)
particles
particularly
polyethylene
(PE),
polypropylene
(PP),
and
polystyrene
(PS)
poses
a
serious
threat
to
environment,
human
health
globally.
Biological
treatment
as
an
environment-friendly
approach
counter
MPs
pollution
has
recent
interest
when
bio-agent
beneficial
functions
in
their
ecosystem.
This
study
aimed
utilize
floc-forming
bacteria
B.
cereus
SHBF2
isolated
from
aquaculture
farm
reducing
(PE,
PP,
PS)
environment.
were
inoculated
for
60
days
media
containing
sole
carbon
source.
On
different
incubation
(DOI),
bacterial
growth
analysis
was
monitored
harvested
examine
weight
loss,
surface
changes,
alterations
chemical
properties.
After
DOI,
highest
loss
recorded
PE,
6.87
±
0.92%,
which
further
evaluated
daily
reduction
rate
(k),
0.00118
gday−
1,
half-life
(t1/2),
605.08
138.52
days.
OD
value
(1.74
0.008
Abs.)
indicated
higher
efficiency
PP
utilization,
so
colony
formation
per
define
volume
(1.04
×
1011
CFU/mL).
Biofilm
formation,
erosions,
cracks,
fragments
evident
during
observation
tested
using
scanning
electron
microscope
(SEM).
carbonyl
alcohol
group
due
oxidation
hydrolysis
by
strain
confirmed
Fourier
transform
infrared
spectroscopic
(FTIR)
analysis.
Additionally,
pH
CO2
evolution
each
type
ensures
activity
mineralization
particles.
findings
this
have
degree
biodegradation
all
selected
SHBF2,
aquaculture,
demonstrated
great
potential
use
efficient
degrading
bacterium
biofloc
farming
system
near
future
guarantee
sustainable
green
production.
Royal Society of Chemistry eBooks,
Год журнала:
2024,
Номер
unknown, С. 162 - 202
Опубликована: Окт. 4, 2024
Over
the
last
decade,
a
range
of
studies
have
demonstrated
that
various
fitness-related
behaviours
are
vulnerable
to
disruption
induced
by
contaminants
emerging
concern
(CECs)
and
legacy
pollutants.
However,
behavioural
responses
animals
when
exposed
pollutants/contaminants
rarely
included
in
discussions
about
regulation
chemicals.
Thus,
improve
our
understanding
opportunities
challenges
for
ecotoxicology,
this
chapter
presents
synthesis
endpoints
experimental
procedures
used
evaluate
response
Nile
tilapia
(Oreochromis
niloticus
–
non-conventional
species
ecotoxicology)
different
CECs
By
focusing
on
methodological
possibilities
be
evaluating
behaviour
Neotropical
species,
we
shed
light
feasibility
reasonableness
using
animal
model
as
complement
or
alternative
use
traditionally
toxicology.
