Biotechnology Advances,
Год журнала:
2022,
Номер
60, С. 107991 - 107991
Опубликована: Май 31, 2022
The
global
production
of
plastics
has
continuously
been
soaring
over
the
last
decades
due
to
their
extensive
use
in
our
daily
life
and
industries.
Although
synthetic
offer
great
advantages
from
packaging
construction
electronics,
low
biodegradability
induce
serious
plastic
pollution
that
damage
environment,
human
health
make
irreversible
changes
ecological
cycle.
In
particular,
containing
only
carbon-carbon
(C-C)
backbone
are
less
susceptible
degradation
lack
hydrolysable
groups.
representative
polyethylene
(PE)
polystyrene
(PS)
account
for
about
40%
total
production.
Various
chemical
biological
processes
with
potential
have
developed
recycle
reuse,
but
biodegradation
seems
be
most
attractive
eco-friendly
method
combat
this
growing
environmental
problem.
review,
we
first
summarize
current
advances
PE
PS
biodegradation,
including
isolation
microbes
degrading
enzymes
different
sources.
Next,
state-of-the-art
techniques
used
evaluating
monitoring
degradation,
scientific
toolboxes
enzyme
discovery
as
well
challenges
strategies
intensively
discussed.
return,
it
inspires
a
further
technological
exploration
expanding
diversity
species
enzymes,
disclosing
essential
pathways
developing
new
approaches
utilize
waste
feedstock
recycling
upcycling.
ChemSusChem,
Год журнала:
2021,
Номер
14(19), С. 4137 - 4151
Опубликована: Май 18, 2021
The
massive
generation
of
plastic
wastes
without
satisfactory
treatment
has
induced
severe
environmental
problems
and
gained
increasing
attentions.
In
this
Minireview,
recent
progresses
in
the
chemical
upcycling
by
using
various
methods
(mainly
past
three
to
five
years)
is
summarized.
points
out
a
"plastic-based
refinery"
concept,
which
use
as
platform
feedstocks
produce
highly
valuable
monomeric
or
oligomeric
compounds,
putting
back
into
circular
economy.
different
upcycle
wastes,
including
hydrogenolysis,
photocatalysis,
pyrolysis,
solvolysis,
others,
are
introduced
each
section
valorize
diverse
value-added
chemicals,
materials,
fuels.
addition,
other
emerging
technologies
well
new
thermosets
covered.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2021,
Номер
9(35), С. 11661 - 11666
Опубликована: Июль 27, 2021
Catalytic
depolymerization
of
polyolefins
is
a
promising
chemical
recycling
strategy
to
create
value-added
products
from
waste
plastics,
which
are
accumulating
in
landfills
and
the
natural
environment
at
unsustainable
rates.
The
cleavage
strong
C–C
bonds
can
be
performed
using
noble
metal
hydrogen
via
hydrogenolysis
mechanism.
Previously,
we
identified
ruthenium
nanoparticles
supported
on
carbon
(Ru/C)
as
highly
active
heterogeneous
catalyst
for
conversion
polyethylene
into
liquid
gaseous
n-alkanes
under
mild
conditions.
In
present
study,
investigated
catalytic
polypropylene
(PP)
conditions
(200–250
°C,
20–50
bar
H2).
We
demonstrate
that
Ru/C
produces
C5–C32
iso-alkane
yields
above
68%
absence
solvent
identify
trade-offs
between
product
yield
temperature,
pressure,
reaction
time.
apply
rigorous
analytical
method
quantify
all
alkane
products.
characterized
was
found
recyclable
after
complete
high
molecular
weight
PP
(Mw
∼
340,000
Da)
hydrocarbons
postconsumer
centrifuge
tube.
Further,
shown
effective
depolymerizing
mixture
high-density
produce
linear
branched
alkanes,
demonstrating
feasibility
streams
mixed
polyolefin
waste.
Biotechnology Advances,
Год журнала:
2022,
Номер
60, С. 107991 - 107991
Опубликована: Май 31, 2022
The
global
production
of
plastics
has
continuously
been
soaring
over
the
last
decades
due
to
their
extensive
use
in
our
daily
life
and
industries.
Although
synthetic
offer
great
advantages
from
packaging
construction
electronics,
low
biodegradability
induce
serious
plastic
pollution
that
damage
environment,
human
health
make
irreversible
changes
ecological
cycle.
In
particular,
containing
only
carbon-carbon
(C-C)
backbone
are
less
susceptible
degradation
lack
hydrolysable
groups.
representative
polyethylene
(PE)
polystyrene
(PS)
account
for
about
40%
total
production.
Various
chemical
biological
processes
with
potential
have
developed
recycle
reuse,
but
biodegradation
seems
be
most
attractive
eco-friendly
method
combat
this
growing
environmental
problem.
review,
we
first
summarize
current
advances
PE
PS
biodegradation,
including
isolation
microbes
degrading
enzymes
different
sources.
Next,
state-of-the-art
techniques
used
evaluating
monitoring
degradation,
scientific
toolboxes
enzyme
discovery
as
well
challenges
strategies
intensively
discussed.
return,
it
inspires
a
further
technological
exploration
expanding
diversity
species
enzymes,
disclosing
essential
pathways
developing
new
approaches
utilize
waste
feedstock
recycling
upcycling.
