Polyethylene
terephthalate
(PET)
is
a
non-degradable
single-use
plastic
and
major
component
of
waste
in
landfills.
Chemical
recycling
one
the
most
widely
adopted
methods
to
transform
post-consumer
PET
into
PET's
building
block
chemicals.
Non-catalytic
depolymerization
very
slow
requires
high
temperatures
and/or
pressures.
Recent
advancements
field
material
science
catalysis
have
delivered
several
innovative
strategies
promote
under
mild
reaction
conditions.
Particularly,
heterogeneous
catalysts
assisted
monomers
other
value-added
chemicals
industrially
compatible
method.
This
review
includes
current
progresses
on
heterogeneously
catalyzed
chemical
PET.
It
describes
four
key
pathways
for
including,
glycolysis,
pyrolysis,
alcoholysis,
reductive
depolymerization.
The
catalyst
function,
active
sites
structure-activity
correlations
are
briefly
outlined
each
section.
An
outlook
future
development
also
presented.
Macromolecular Rapid Communications,
Год журнала:
2020,
Номер
42(3)
Опубликована: Сен. 30, 2020
Abstract
The
current
global
plastics
economy
is
highly
linear,
with
the
exceptional
performance
and
low
carbon
footprint
of
polymeric
materials
at
odds
dramatic
increases
in
plastic
waste.
Transitioning
to
a
circular
that
retains
its
highest
value
condition
essential
reduce
environmental
impacts,
promoting
reduction,
reuse,
recycling.
Mechanical
recycling
an
tool
environmentally
economically
sustainable
plastics,
but
mechanical
processes
are
limited
by
cost,
degradation
properties,
inconsistent
quality
products.
This
review
covers
methods
challenges
for
five
main
packaging
plastics:
poly(ethylene
terephthalate),
polyethylene,
polypropylene,
polystyrene,
poly(vinyl
chloride)
through
lens
economy.
Their
reprocessing
induced
mechanisms
introduced
strategies
improve
their
discussed.
Additionally,
this
briefly
examines
approaches
polymer
blending
mixed
waste
streams
applications
lower
recyclate.
Green Chemistry,
Год журнала:
2022,
Номер
24(23), С. 8899 - 9002
Опубликована: Янв. 1, 2022
This
paper
reviewed
the
entire
life
cycle
of
plastics
and
options
for
management
plastic
waste
to
address
barriers
industrial
chemical
recycling
further
provide
perceptions
on
possible
opportunities
with
such
materials.
Environmental Science & Technology Letters,
Год журнала:
2021,
Номер
8(11), С. 989 - 994
Опубликована: Сен. 22, 2021
Although
human
exposure
to
microplastics
(MPs)
and
the
health
effects
thereof
are
a
global
concern,
little
is
known
about
magnitude
of
exposure.
In
this
study,
we
quantitatively
determined
concentrations
polyethylene
terephthalate
(PET)
polycarbonate
(PC)
MPs
in
three
meconium
six
infant
10
adult
feces
samples
collected
from
New
York
State.
PET
PC
were
found
some
(at
concentration
ranges
below
limit
quantification
[
Chemical Reviews,
Год журнала:
2023,
Номер
123(9), С. 5612 - 5701
Опубликована: Март 14, 2023
Plastics
are
everywhere
in
our
modern
way
of
living,
and
their
production
keeps
increasing
every
year,
causing
major
environmental
concerns.
Nowadays,
the
end-of-life
management
involves
accumulation
landfills,
incineration,
recycling
to
a
lower
extent.
This
ecological
threat
environment
is
inspiring
alternative
bio-based
solutions
for
plastic
waste
treatment
toward
circular
economy.
Over
past
decade,
considerable
efforts
have
been
made
degrade
commodity
plastics
using
biocatalytic
approaches.
Here,
we
provide
comprehensive
review
on
recent
advances
enzyme-based
biocatalysis
design
related
processes
recycle
or
upcycle
plastics,
including
polyesters,
polyamides,
polyurethanes,
polyolefins.
We
also
discuss
scope
limitations,
challenges,
opportunities
this
field
research.
An
important
message
from
that
polymer-assimilating
enzymes
very
likely
part
solution
reaching
Joule,
Год журнала:
2021,
Номер
5(9), С. 2479 - 2503
Опубликована: Июль 15, 2021
Esterases
have
emerged
as
important
biocatalysts
for
enzyme-based
polyester
recycling
of
poly(ethylene
terephthalate)
(PET)
to
terephthalic
acid
(TPA)
and
ethylene
glycol
(EG).
Here,
we
present
process
modeling,
techno-economic,
life-cycle,
socioeconomic
impact
analyses
an
enzymatic
PET
depolymerization-based
process,
which
compare
with
virgin
TPA
manufacturing.
We
predict
that
enzymatically
recycled
(rTPA)
can
be
cost-competitive
highlight
key
areas
achieve
this.
In
addition
favorable
long-term
benefits,
rTPA
reduce
total
supply
chain
energy
use
by
69%–83%
greenhouse
gas
emissions
17%–43%
per
kg
TPA.
An
economy-wide
assessment
the
US
estimates
environmental
impacts
up
95%
while
generating
45%
more
also
relative
production.
Sensitivity
impactful
research
opportunities
pursue
toward
realizing
biological
upcycling.
Microplastics
are
an
emergent
yet
critical
issue
for
the
environment
because
of
high
degradation
resistance
and
bioaccumulation.
Unfortunately,
current
technologies
to
remove,
recycle,
or
degrade
microplastics
insufficient
complete
elimination.
In
addition,
fragmentation
mismanaged
plastic
wastes
in
have
recently
been
identified
as
a
significant
source
microplastics.
Thus,
developments
effective
removal
methods,
well
as,
plastics
recycling
strategies
crucial
build
microplastics-free
environment.
Herein,
this
review
comprehensively
summarizes
eliminating
from
highlights
two
key
aspects
achieve
goal:
1)
Catalytic
into
environmentally
friendly
organics
(carbon
dioxide
water);
2)
catalytic
upcycling
monomers,
fuels,
valorized
chemicals.
The
mechanisms,
catalysts,
feasibility,
challenges
these
methods
also
discussed.
Novel
such
photocatalysis,
advanced
oxidation
process,
biotechnology
promising
eco-friendly
candidates
transform
benign
valuable
products.
future,
more
effort
is
encouraged
develop
conversion
products
with
efficiency,
product
selectivity,
low
cost
under
mild
conditions.
ACS Catalysis,
Год журнала:
2022,
Номер
12(6), С. 3382 - 3396
Опубликована: Фев. 28, 2022
Polyethylene
terephthalate
(PET)
is
the
most
widespread
synthetic
polyester,
having
been
utilized
in
textile
fibers
and
packaging
materials
for
beverages
food,
contributing
considerably
to
global
solid
waste
stream
environmental
plastic
pollution.
While
enzymatic
PET
recycling
upcycling
have
recently
emerged
as
viable
disposal
methods
a
circular
economy,
only
handful
of
benchmark
enzymes
thoroughly
described
subjected
protein
engineering
improved
properties
over
last
16
years.
By
analyzing
specific
material
reaction
mechanisms
context
interfacial
biocatalysis,
this
Perspective
identifies
several
limitations
current
degradation
approaches.
Unbalanced
enzyme-substrate
interactions,
limited
thermostability,
low
catalytic
efficiency
at
elevated
temperatures,
inhibition
caused
by
oligomeric
intermediates
still
hamper
industrial
applications
that
require
high
efficiency.
To
overcome
these
limitations,
successful
studies
using
innovative
experimental
computational
approaches
published
extensively
recent
years
thriving
research
field
are
summarized
discussed
detail
here.
The
acquired
knowledge
experience
will
be
applied
near
future
address
contributed
other
mass-produced
polymer
types
(e.g.,
polyamides
polyurethanes)
should
also
properly
disposed
biotechnological
