Energy Sources Part A Recovery Utilization and Environmental Effects,
Год журнала:
2023,
Номер
45(2), С. 5063 - 5080
Опубликована: Май 2, 2023
The
COVID-19
pandemic
has
created
a
new
type
of
waste
(surgical
mask
"WMs")
that
presents
major
challenge
now
and
in
the
future,
given
strong
possibilities
similar
epidemics
to
reoccur.
In
order
find
an
effective
industrial
solution
millions
WMs
produced
daily,
this
research
aims
develop
eco-friendly
strategy
convert
into
H2-CH4-rich
syngas,
carbon
nanoparticles
(CNPs),
benzene-rich
tar
using
updraft
gasifier
system.
experiments
started
with
preparation
WM
granules
shredding
followed
by
granulation
processes.
Subsequently,
were
processed
lab-scale
reactor
capacity
0.9–1
kg/h
consisted
continuous
feed
system,
gasifier,
sampling
system
for
syngas
tar,
ceramic
filtration
unit
separating
CNPs
against
synthesis
gas,
burner.
gasification
performed
ambient
air
different
air−fuel
equivalence
ratios
(ER:
0.21,
0.25,
0.29)
temperatures
(700°C,
800°C,
900°C)
determine
optimal
conditions
yield
maximum
amount
less
impurities.
chemical
composition
morphology
obtained
products
(syngas,
CNPs)
observed
GC-FID,
FTIR,
SEM.
results
showed
production
(4.29
±
0.16
HHV
3804
kJ/kg)
(0.14
0.011
kg/h)
accompanied
moderate
rate
(0.123
0.009
41,139.88
could
be
at
900°C
ER
=
0.29,
while
highest
H2
(16.93
1.7
vol.%)
CH4
(10.44
0.85
contents
product
synthesized
0.19.
Benzene
toluene
GC-FID
compounds
formulated
abundance
up
25.6%
11%,
respectively.
Meanwhile,
0.24
allowed
best
spherical-shaped
diameter
than
200
nm.
Cement and Concrete Composites,
Год журнала:
2023,
Номер
139, С. 105047 - 105047
Опубликована: Апрель 6, 2023
Surgical
face
mask
usage
has
rapidly
increased
in
the
last
two
years
due
to
COVID-19
pandemic.
This
generates
vast
amounts
of
plastic
waste,
causing
significant
risks
ecosystem.
Thus,
this
study
assesses
potential
using
recycled
fibre
from
waste
as
reinforcement
3D
concrete
printing
(3DCP)
applications
improve
printability
while
reducing
landfill
waste.
The
effect
masks
on
rheological
characteristics
printable
mixes
and
mechanical
performance
printed
elements
was
evaluated
for
different
contents
shredded
(i.e.,
1%
2%
by
vol).
properties
like
static
dynamic
yield
strengths,
apparent
viscosity,
thixotropic
behaviour,
along
with
compressive
flexural
strength,
were
specimens
compared
their
mould-cast
counterparts.
Further,
variation
interlayer
bond
strength
porosity
dosages
also
investigated.
In
addition,
a
comparative
fresh
hardened
performed
polypropylene
(PP)
fibres
masks.
addition
significantly
improved
good
extrudability
buildability
all
dosages.
Compared
masks,
PP
showed
poor
higher
41%
dosage
when
unreinforced
concrete.
Furthermore,
tested
weaker
interface,
an
increase
74%
82%
content.
content
21%
improvement
observed
have
highest
surface
moisture
are
be
comparable
dosage.
similar.
The Science of The Total Environment,
Год журнала:
2024,
Номер
919, С. 170469 - 170469
Опубликована: Фев. 2, 2024
The
COVID-19
pandemic
created
an
unprecedented
demand
for
PPE,
with
single-use
face
masks
emerging
as
a
critical
tool
in
containing
virus
transmission.
However,
the
extensive
use
and
improper
disposal
of
these
masks,
predominantly
composed
non-biodegradable
plastics,
has
exacerbated
environmental
challenges.
This
research
presents
innovative
method
mechanically
upcycling
PPEs
used
medical
sectors
i.e.
single
masks.
study
investigates
facile
approach
reclamation
infection-free
pure
polypropylene
(PP)
plastic
from
discarded
(W-PP)
blends
it
various
vegetable
oil
percentages
(5,
10
20
%),
resulting
versatile
material
suitable
applications.
Melt
flow
index,
rheological
behaviour,
DSC
FTIR
were
employed
to
investigate
effect
oil/radical
initiator
through
chemical
grafting
on
W-PP
properties.
results
demonstrate
significant
enhancements
tensile
strength
modulus
when
blended
radical
initiator.
There
was
marked
increase
(33
%)
strain
(55
compared
untreated
W-PP,
rendering
both
robust
flexible.
Furthermore,
we
this
upcycled
fabrication
glass
fibre-reinforced
composites,
notable
impact
resistance.
demonstrates
excellent
potential
applications,
such
sheet
forming
3D
printing,
where
non-brittleness
plastics
plays
pivotal
role
manufacturing
high-quality
products.
cost-benefit
analysis
underscores
PPE
waste
sustainable
solution
mitigate
pollution
conserve
valuable
resources.
applications
span
wide
range
industries,
including
automotive
packaging,
printing.
Case Studies in Chemical and Environmental Engineering,
Год журнала:
2021,
Номер
4, С. 100125 - 100125
Опубликована: Авг. 26, 2021
Single
use
personal
protective
equipment
(PPE)
has
played
a
major
role
in
preventing
COVID-19
infection.
Since
the
beginning
of
pandemic,
over
4
million
tonnes
polypropylene
PPE
waste
been
disposed
into
environment
uncontrolled
manner
causing
significant
and
long-term
ecological
damage.
This
work
also
highlights
several
effective
measures
to
alleviate
problem
waste.
Short-term
include
knowledge
sharing
minimise
single
adapt
innovative
recycling
technologies.
To
prepare
for
future
it
is
essential
phase
out
using
natural
based
polymers.
Environmental Technology & Innovation,
Год журнала:
2022,
Номер
28, С. 102837 - 102837
Опубликована: Июль 21, 2022
The
threat
of
epidemic
outbreaks
like
SARS-CoV-2
is
growing
owing
to
the
exponential
growth
global
population
and
continual
increase
in
human
mobility.
Personal
protection
against
viral
infections
was
enforced
using
ambient
air
filters,
face
masks,
other
respiratory
protective
equipment.
Available
facemasks
feature
considerable
variation
efficacy,
materials
usage
characteristic
properties.
Despite
their
widespread
use
importance,
masks
pose
major
potential
threats
due
uncontrolled
manufacture
disposal
techniques.
Improper
solid
waste
management
enables
propagation
increases
volume
associated
biomedical
at
an
alarming
rate.
Polymers
used
single-use
include
a
spectrum
chemical
constituents:
plasticisers
flame
retardants
leading
health-related
issues
over
time.
ample
research
this
field,
efficacy
personal
equipment
its
impact
post-disposal
yet
be
explored
satisfactorily.
following
review
assimilates
information
on
different
forms
currently
use.
Proper
techniques
pertaining
such
special
wastes
have
also
been
discussed.
study
features
holistic
overview
innovations
made
corresponding
health
environment.
Strategies
with
SDG3
SDG12,
outlining
safe
proper
waste,
Furthermore,
employing
CFD
paradigm,
3D
model
mask
created
based
fluid
flow
during
breathing
Lastly,
concludes
possible
future
advancements
promising
avenues
