Water,
Год журнала:
2023,
Номер
15(15), С. 2695 - 2695
Опубликована: Июль 26, 2023
Temperature
is
an
important
factor
influencing
the
treatment
effect
of
biological
aerated
filters
(BAFs).
In
this
study,
BAFs
incorporating
manganese
oxides
(BMOs)
were
used
to
treat
micro-polluted
source
water
containing
organic
masses
and
ammonia,
influence
temperature
on
removal
efficiency
pollutants
was
investigated.
The
results
showed
that
after
formation
biogenic
in
filter
layer,
CODMn
significantly
improved.
When
approximately
24
°C,
16
6~8
rates
CODMn,
60.64,
42.55,
20.48;
98.40,
95.58,
85.04;
98.70,
97.63,
96.38%,
respectively.
hierarchically
structured
as
follows:
>
ammonia
manganese.
Analysis
efficiencies
along
layer
had
been
eliminated
every
filtration
mainly
removed
0~0.4
m
0~0.8
regions
With
a
decreasing
temperature,
concentrations
increased.
manganese,
processes
all
first-order
kinetic
reactions.
constant
k
gradually
decreased,
reaction
half-life
(t1/2)
Water,
Год журнала:
2024,
Номер
16(3), С. 461 - 461
Опубликована: Янв. 31, 2024
The
riparian
zone
has
a
proven
ability
to
reduce
agricultural
nonpoint-source
nitrogen
pollution.
However,
prior
studies
have
only
assessed
nitrification
and
denitrification
their
influencing
factors,
such
as
hydrology,
climate,
vegetation,
soil
physicochemical
properties,
overlooked
the
role
of
pesticide
accumulation,
which
is
an
important
anthropogenic
pollutant.
This
study
investigated
response
microbial
cycle
in
zones
60
days
acetochlor
(ACE)
exposure
at
doses
0.5,
2.5,
5.0
mg/kg.
results
showed
that
ACE
inhibited
transformation
NH3-N,
NO3−-N,
NO2−-N
also
decreased
potential
rates
by
affecting
respective
enzyme
activities
related
communities.
Metagenomic
sequencing
revealed
expression
functional
genes
associated
with
NO3−-N
processes,
including
denitrification,
dissimilatory
nitrate
reduction
ammonium,
assimilatory
reduction,
declined
most.
recommended
field
dose
(0.5
mg/kg)
slight
effect
on
communities,
whereas
5
10
times
were
highly
inhibitory.
novel
exploring
effects
soils,
suggesting
accumulation
could
affect
health
aquatic
ecosystems.
Agronomy,
Год журнала:
2024,
Номер
14(5), С. 934 - 934
Опубликована: Апрель 30, 2024
To
reduce
pesticide
pollution
and
promote
sustainable
agricultural
development
in
China,
we
designed
a
pilot-scale
biofilter
system
to
treat
residual
imidacloprid
wastewater
an
orchard.
The
demonstrated
high
rate
of
removal
from
the
biodegradation
wastewater,
with
rates
outlet
exceeding
99%
at
different
concentrations
pesticides.
Among
environmental
factors,
concentration
inlet
biomixture
significantly
affected
activity
imidacloprid-degrading
bacteria.
dominant
microbial
communities
during
stable
operation
included
Firmicutes,
Actinobacteria,
Proteobacteria,
Bacteroidetes
phylum
level
Bacillus,
Methylobacter,
unclassified_f__Microbacteriaceae
genus
level.
In
future
initiatives
improve
performance
applicability,
increasing
attention
should
be
paid
communities,
number
units,
important
factors.
Orchard
workers
China
existing
treatment
mitigate
non-point
source
pollution.
