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.
Nature Communications,
Год журнала:
2021,
Номер
12(1)
Опубликована: Авг. 17, 2021
Abstract
Plastic
wastes
represent
a
largely
untapped
resource
for
manufacturing
chemicals
and
fuels,
particularly
considering
their
environmental
biological
threats.
Here
we
report
electrocatalytic
upcycling
of
polyethylene
terephthalate
(PET)
plastic
to
valuable
commodity
(potassium
diformate
terephthalic
acid)
H
2
fuel.
Preliminary
techno-economic
analysis
suggests
the
profitability
this
process
when
ethylene
glycol
(EG)
component
PET
is
selectively
electrooxidized
formate
(>80%
selectivity)
at
high
current
density
(>100
mA
cm
−2
).
A
nickel-modified
cobalt
phosphide
(CoNi
0.25
P)
electrocatalyst
developed
achieve
500
1.8
V
in
membrane-electrode
assembly
reactor
with
>80%
Faradaic
efficiency
selectivity
formate.
Detailed
characterizations
reveal
in-situ
evolution
CoNi
P
catalyst
into
low-crystalline
metal
oxy(hydroxide)
as
an
active
state
during
EG
oxidation,
which
might
be
responsible
its
advantageous
performances.
This
work
demonstrates
sustainable
way
implement
waste
value-added
products.
Single-use
plastics
impose
an
enormous
environmental
threat,
but
their
recycling,
especially
of
polyolefins,
has
been
proven
challenging.
We
report
a
direct
method
to
selectively
convert
polyolefins
branched,
liquid
fuels
including
diesel,
jet,
and
gasoline-range
hydrocarbons,
with
high
yield
up
85%
over
Pt/WO
ACS Sustainable Chemistry & Engineering,
Год журнала:
2021,
Номер
9(47), С. 15722 - 15738
Опубликована: Ноя. 12, 2021
Over
the
years,
petrochemical
industry
has
developed
a
plethora
of
polymers
that
are
contributing
to
well-being
humanity.
Irresponsible
disposal
used
plastics
has,
however,
led
buildup
litter,
which
is
fouling
environment,
harming
wildlife,
and
wasting
valuable
resources.
This
paper
critically
reviews
challenge
opportunities
in
converting
plastic
waste
into
feedstock
for
industry.
It
discusses
(a)
amount,
quality,
sorting
waste;
(b)
mechanical
recycling
extraction
or
dissolution/precipitation;
(c)
chemical
monomers
other
chemicals;
(d)
by
incineration,
biodegradation,
landfill,
microplastics.
will,
finally,
broaden
circularity
discussion
with
life-cycle
analyses
(LCA),
design
recycling,
future
role
renewable
carbon
as
feedstock.
Science,
Год журнала:
2021,
Номер
374(6563), С. 71 - 76
Опубликована: Сен. 30, 2021
Reducing
net
emission
The
great
majority
of
plastics
in
current
use
are
sourced
from
fossil
fuels,
with
additional
fuels
combusted
to
power
their
manufacture.
Substantial
research
is
focused
on
finding
more
sustainable
building
blocks
for
next-generation
polymers.
Meys
et
al
.
report
a
series
life
cycle
analyses
suggesting
that
even
the
varieties
commercial
monomers
could
potentially
be
manufactured
and
polymerized
no
greenhouse
gas
emissions.
relies
combining
recycling
plastic
waste
chemical
reduction
carbon
dioxide
captured
incineration
or
derived
biomass.
—JSY
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.
Science,
Год журнала:
2021,
Номер
373(6556), С. 783 - 789
Опубликована: Авг. 12, 2021
Identifying
plastics
capable
of
chemical
recycling
to
monomer
(CRM)
is
the
foremost
challenge
in
creating
a
sustainable
circular
plastic
economy.
Polyacetals
are
promising
candidates
for
CRM
but
lack
useful
tensile
strengths
owing
low
molecular
weights
produced
using
current
uncontrolled
cationic
ring-opening
polymerization
(CROP)
methods.
Here,
we
present
reversible-deactivation
CROP
cyclic
acetals
commercial
halomethyl
ether
initiator
and
an
indium(III)
bromide
catalyst.
Using
this
method,
synthesize
poly(1,3-dioxolane)
(PDXL),
which
demonstrates
strength
comparable
some
commodity
polyolefins.
Depolymerization
PDXL
strong
acid
catalysts
returns
near-quantitative
yield
even
proceeds
from
waste
mixture.
Our
efficient
method
affords
tough
thermoplastic
that
can
undergo
selective
depolymerization
monomer.
