Environment International,
Год журнала:
2024,
Номер
190, С. 108809 - 108809
Опубликована: Июнь 8, 2024
Microplastics,
as
a
type
of
anthropogenic
pollution
in
aquatic
ecosystems,
affect
the
carbon
cycle
organic
matter.
Although
some
studies
have
investigated
effects
microplastics
on
dissolved
matter
(DOM),
impact
alterations
chemical
properties
refractory
DOM
and
release
remains
unclear.
Here,
we
observed
that
microplastic
treatments
(e.g.,
polystyrene,
PS)
altered
composition
function
microbial
community,
notably
increasing
abundance
families
involved
consuming
easily
degradable
During
process
which
community
decomposed
into
DOM,
PS
underwent
surface
oxidation.
The
oxidized
aggregated
with
microorganisms
through
electrostatic
interactions
bonds.
Moreover,
these
between
utilization
matter,
resulting
significant
decrease
CO
Environmental Science & Technology,
Год журнала:
2023,
Номер
58(1), С. 534 - 544
Опубликована: Дек. 18, 2023
A
symbiotic
microalgal–bacterial
biofilm
can
enable
efficient
carbon
(C)
and
nitrogen
(N)
removal
during
aeration-free
wastewater
treatment.
However,
the
contributions
of
microalgae
bacteria
to
C
N
remain
unexplored.
Here,
we
developed
a
baffled
oxygenic
reactor
(MBBfR)
for
nonaerated
treatment
greywater.
hydraulic
retention
time
(HRT)
6
h
gave
highest
biomass
concentration
thickness
as
well
maximum
chemical
oxygen
demand
(94.8%),
linear
alkylbenzenesulfonates
(LAS,
99.7%),
total
(97.4%).
An
HRT
4
caused
decline
in
all
performance
metrics
due
LAS
biotoxicity.
Most
(92.6%)
(95.7%)
removals
were
ultimately
associated
with
newly
synthesized
biomass,
only
minor
fractions
transformed
into
CO2
(2.2%)
N2
(1.7%)
on
function
multifarious-related
enzymes
biofilm.
Specifically,
photosynthesis
contributed
at
75.3
79.0%,
respectively,
which
accounted
17.3%
16.7%
by
assimilation.
Oxygen
produced
favored
organics
mineralization
supply
bacteria.
The
system
achieved
stable
greywater
treatment,
thus
providing
novel
technology
achieve
low-energy-input
reuse,
resource
recovery.
Environmental Science & Technology,
Год журнала:
2024,
Номер
58(6), С. 2870 - 2880
Опубликована: Янв. 5, 2024
Researchers
and
engineers
are
committed
to
finding
effective
approaches
reduce
dissolved
organic
nitrogen
(DON)
meet
more
stringent
effluent
total
limits
minimize
eutrophication
potential.
Here,
we
provided
a
promising
approach
by
adding
specific
doses
of
2-hydroxy-1,4-naphthoquinone
(HNQ)
postdenitrification
bioreactors.
This
small
dosage
0.03–0.1
mM
HNQ
effectively
reduced
the
concentrations
DON
in
(ANOVA,
p
<
0.05)
up
63%
reduction
with
dosing
0.1
when
compared
control
Notably,
an
algal
bioassay
indicated
that
played
dominant
role
stimulating
phytoplankton
growth,
thus
potential
bioreactors
using
dramatically
decreased
The
microbe-DON
correlation
analysis
showed
modified
microbial
community
composition
both
weaken
production
promote
uptake
labile
DON,
minimizing
concentration.
toxic
assessment
demonstrated
ecological
safety
from
strategy
addition.
Overall,
is
redox
mediator
concentration
purpose
meeting
low
levels
remarkably
effects.
