Circular Economy,
Год журнала:
2024,
Номер
3(1), С. 100073 - 100073
Опубликована: Янв. 28, 2024
The
recycling
of
waste
printed
circuit
boards
(WPCBs)
generates
nonmetallic
fractions
(NMFs);
due
to
the
complex
components
NMFs
and
limited
nature
economic
benefits
treating
NMFs,
treatment
is
challenging.
In
this
study,
two
types
NMFs—dry-NMFs
(D-NMFs)
wet-NMFs
(W-NMFs)—derived
from
dry
wet
separation
processes
WPCBs,
respectively,
were
investigated.
These
used
as
fillers
reinforce
polyethylene
(PE)
matrix,
their
effects
on
composite
properties
examined.
Thermal
property
studies
revealed
that
incorporating
both
improved
thermal
stability
prepared
samples.
When
neat
PE
was
filled
with
15
wt.%
D-NMFs
W-NMFs,
final
decomposition
temperature
(Tf)
increased
475
°C
482
487
°C,
respectively.
Mechanical
addition
sample,
particularly
enhanced
stiffness
samples,
although
at
expense
some
reduction
in
toughness
values.
tensile
strength,
modulus,
flexural
modulus
values
9.41,
121.80,
5.89,
99.15
MPa
for
11.15,
521.82,
17.94,
597.29
MPa,
composites
containing
25
W-NMFs.
Furthermore,
introduction
shellfish
wastes
NMF/PE
blend,
especially
clam
shell,
further
overall
composite.
After
adding
8
shell
Tf
498
°C.
11.37,
355.13,
16.06,
443.31
12.26,
466.73,
18.71,
568.46
shell.
Thus,
study
contributes
WPCB
literature
promotes
circular
economy
development.
Environmental Science & Technology,
Год журнала:
2024,
Номер
58(3), С. 1423 - 1440
Опубликована: Янв. 10, 2024
Plastic
waste
has
emerged
as
a
serious
issue
due
to
its
impact
on
environmental
degradation
and
resource
scarcity.
recycling,
especially
of
halogen-containing
plastics,
presents
challenges
potential
secondary
pollution
lower-value
implementations.
Chemical
recycling
via
pyrolysis
is
the
most
versatile
robust
approach
for
combating
plastic
waste.
In
this
Review,
we
present
recent
advancements
in
halogen-plastic
utilization
pathways
from
"reducing
upcycling"
halogens.
We
emphasize
advanced
management
halogen-plastics
through
copyrolysis
with
solid
wastes
(waste
polymers,
biomass,
coal,
etc.),
which
an
efficient
method
dealing
mixed
obtain
high-value
products
while
reducing
undesirable
substances.
Innovations
catalyst
design
reaction
configurations
catalytic
are
comprehensively
evaluated.
particular,
tandem
catalysis
system
promising
route
halogen
removal
selective
conversion
targeted
products.
Furthermore,
propose
novel
insights
regarding
upcycling
halogens
halogen-plastics.
This
includes
preparation
halogen-based
sorbents
elemental
mercury
removal,
halogenation–vaporization
process
metal
recovery,
development
halogen-doped
functional
materials
new
energy
applications.
The
reutilization
facilitates
halogen-plastics,
but
many
efforts
needed
mutually
beneficial
outcomes.
Overall,
future
investigations
catalyst-driven
technologies
highlighted.
