Applied Physics Letters,
Год журнала:
2024,
Номер
124(13)
Опубликована: Март 25, 2024
Plasma
bullets
in
atmospheric
pressure
plasma
jets
have
drawn
much
scholarly
attention
the
past
decade,
especially
its
shape.
This
Letter
reports
formation
and
evolution
mechanism
of
a
solid-in-hollow
structured
bullet.
At
high
pulse
repetition
frequency
(≥20
kHz)
long
rising
time
(≥200
ns),
traditional
hollow
ring
bullet
turns
into
structure,
plume
correspondingly
appears
as
purple
external
with
an
extra
internal
filamentary
red
core
under
bare
eyes.
An
image
process
method
based
on
color
recognition
decoupling
is
designed
to
separate
images
then
used
analyze
discharge
together
intensified
charge-coupled
device
imaging
spectrum
measurement.
Analyses
reveal
that
dominant
ionization
sources
for
are
N2
He,
respectively,
can
be
enhanced
by
increasing
frequency,
which
might
explained
electron
oscillating
heating
frequency.
Finally,
studied,
initially
well
when
it
just
exits
tube
end,
making
hollow-in-hollow
but
quickly
contracts
solid
due
Coulomb
repulsion
between
two
rings.
Environmental Pollution,
Год журнала:
2023,
Номер
342, С. 123041 - 123041
Опубликована: Ноя. 30, 2023
Wastewater
decontamination
in
pharmaceuticals
is
crucial
to
prevent
environmental
and
health
risks
from
API
residues
other
contaminants.
Advanced
oxidation
processes
(AOPs)
combined
with
cavitational
treatments
offer
effective
solutions.
Challenges
include
designing
reactors
on
a
large
scale
monitoring
the
effectiveness
synergies
of
hybrid
technology.
In
present
work,
pilot-scale
treatment
real
high
COD
(485
g/L)
pharmaceutical
wastewater
(PW)
was
investigated
using
hydrodynamic
cavitation
(HC)
operated
individually
at
330
L/h
or
combination
oxidants
electrical
discharge
(ED)
cold
plasma
(15
kV
48
kHz).
The
first
approach
consisted
PW
alone
7
L
1:100
diluted
HC-induced
pressure
60
bar
flow
rate
L/h.
However,
this
strategy
did
not
provide
satisfactory
results
for
(∼15%
less),
only
when
HC
extended
more
than
30
min
recirculation
mode,
encouraging
were
obtained
(∼45%
reduction).
Consequently,
combining
ED-cold
chosen
treat
high-COD
PW.
Aiming
establish
an
efficient
flow-through
process,
after
optimising
all
parameters
(45
10
kHz
ED
frequency),
best
abatement
∼50
%
recorded
1:50
subsequent
adsorption
step
over
activated
carbon
required
achieve
almost
quantitative
reduction
(95%+).
Our
integrated
physicochemical
process
proved
be
extremely
treating
industrial
resulted
remarkable
value.
addition,
residual
surfactants
content
also
drastically
reduced
(98%+)
small
amount
added
HC/ED
treatment.
Applied Sciences,
Год журнала:
2023,
Номер
13(23), С. 12631 - 12631
Опубликована: Ноя. 23, 2023
Owing
to
current
global
water
scarcity,
there
is
an
urgent
need
for
advanced
treatment
technologies
be
invested
in
wastewater
processes.
Additionally,
growing
concern
that
some
anthropogenic
contaminants
have
been
detected
finished
drinking
and
slated
reuse,
such
as
organic
chemicals,
pharmaceuticals,
industrial
dyes
even
viruses,
their
health
effects
are
poorly
understood
at
low
concentrations.
Atmospheric
pressure
plasma
(APP)
a
kind
of
oxidation
technology
with
high
efficiency,
energy
consumption,
little
environmental
impact.
In
recent
decades,
new
method
pollution
abatement,
APP
has
proven
able
decompose
completely
eliminate
stubborn
contaminants.
This
paper
focuses
on
the
application
different
types
purification,
containing
perfluorinated
compounds,
pesticides,
dyes,
phenols,
viruses.
Then,
discharge
parameters
(discharge
power,
electrode
distance,
gas
flow
rate
working
composition)
degradation
efficiency
were
summarized.
Finally,
existing
challenges
future
prospects
plasma-based
purification
outlined.
Water Practice & Technology,
Год журнала:
2024,
Номер
19(7), С. 2645 - 2654
Опубликована: Май 27, 2024
ABSTRACT
Per-
and
polyfluoroalkyl
substances
(PFASs)
can
be
found
ubiquitously
in
the
environment
due
to
their
large-scale
use,
they
pose
risks
both
ecosystems
human
health.
These
pollutants
are
highly
persistent,
making
them
difficult
or
impossible
break
down
with
standard
processing
methods.
Therefore,
focus
of
this
research
is
explore
an
alternative
approach
reduce
PFAS-contaminated
water
by
investigating
breakdown
these
using
atmospheric
non-thermal
plasma
(NTP)
technology.
The
experiments
tested
PFOA
solutions
varying
parameters,
including
different
oxygen
nitrogen
ratios
as
feeding
air,
without
a
cooling
system,
at
time
exposures.
process
showed
energy
efficiency
being
ranged
from
0.31
15.31
mg/kWh.
Chemical
analysis
treated
samples
confirmed
reactor's
suitability
for
PFAS
degradation,
achieving
63.75%
reduction
initial
concentration
after
2
h
treatment.
Furthermore,
degradation
products
such
PFHpA,
PFHxA,
PFPeA,
PFBA
were
identified
Overall,
results
suggest
that
plasma-based
technology
promising
treating
water.
Cleaner Water,
Год журнала:
2024,
Номер
1, С. 100018 - 100018
Опубликована: Май 29, 2024
The
world
is
facing
an
alarming
situation
in
terms
of
pollution,
with
water
contamination
being
a
critical
concern
for
scientists
aiming
to
protect
the
ecosystem.
Contaminants
produced
from
municipal,
industrial,
commercial,
and
agricultural
processes,
along
domestic
activities,
pose
serious
threats
aquatic
life
human
welfare.
Addressing
these
pollutants
requires
attention.
Various
physical,
chemical,
biological
approaches
are
used
purification,
each
showing
different
levels
efficacy.
Recent
advancements
wastewater
treatment
techniques,
such
as
Non-Thermal
Plasma
Discharge,
Genetic
Engineering,
Nanotechnology,
CRISPR-Cas9,
Elimination
Emerging
Organic
Pollutants
(EOPs),
use
durable
substrates
Metal-Organic
Frameworks
(MOFs)
covalent
organic
frameworks,
have
shown
promising
results.
For
example,
Nanotechnology
has
demonstrated
removal
efficiency
up
95%
heavy
metals,
while
MOFs
achieved
over
90%
pollutant
degradation.
effectiveness
techniques
varies
depending
on
type
environmental
factors.
Consequently,
selecting
appropriate
method
crucial
achieving
better
cost-effective
outcomes
treatment.
Applied Physics Letters,
Год журнала:
2024,
Номер
124(13)
Опубликована: Март 25, 2024
Plasma
bullets
in
atmospheric
pressure
plasma
jets
have
drawn
much
scholarly
attention
the
past
decade,
especially
its
shape.
This
Letter
reports
formation
and
evolution
mechanism
of
a
solid-in-hollow
structured
bullet.
At
high
pulse
repetition
frequency
(≥20
kHz)
long
rising
time
(≥200
ns),
traditional
hollow
ring
bullet
turns
into
structure,
plume
correspondingly
appears
as
purple
external
with
an
extra
internal
filamentary
red
core
under
bare
eyes.
An
image
process
method
based
on
color
recognition
decoupling
is
designed
to
separate
images
then
used
analyze
discharge
together
intensified
charge-coupled
device
imaging
spectrum
measurement.
Analyses
reveal
that
dominant
ionization
sources
for
are
N2
He,
respectively,
can
be
enhanced
by
increasing
frequency,
which
might
explained
electron
oscillating
heating
frequency.
Finally,
studied,
initially
well
when
it
just
exits
tube
end,
making
hollow-in-hollow
but
quickly
contracts
solid
due
Coulomb
repulsion
between
two
rings.
