Ecotoxicology and Environmental Safety,
Journal Year:
2023,
Volume and Issue:
269, P. 115758 - 115758
Published: Dec. 20, 2023
Aminolysis
is
widely
recognized
as
a
valuable
chemical
route
for
depolymerizing
polymeric
materials
containing
ester,
amide,
or
urethane
functional
groups,
including
polyurethane
foams.
Bio-based
foams,
pristine
and
reinforced
with
40
wt%
of
sustainable
fillers,
were
depolymerized
in
the
presence
bio-derived
butane-1,4-diamine,
BDA.
A
process
comparison
was
made
using
fossil-derived
ethane-1,2-diamine,
EDA,
by
varying
amine/polyurethane
ratio
(F/A,
1:1
1:0.6).
The
obtained
systems
analyzed
FTIR
NMR
characterizations
to
understand
effect
both
diamines
on
degradation
pathway.
use
bio-based
BDA
seemed
be
more
effective
respect
conventional
owing
its
stronger
basicity
(and
thus
higher
nucleophilicity),
corresponding
faster
depolymerization
rates.
BDA-based
then
employed
prepare
second-generation
composite
foams
partial
replacement
isocyanate
components
(20
wt%).
morphological,
mechanical,
thermal
conductivity
properties
evaluated.
best
performances
(σ10
%=71
±
9
kPa,
λ
=
0.042
0.015
W∙
m
Sustainability,
Journal Year:
2024,
Volume and Issue:
16(7), P. 2615 - 2615
Published: March 22, 2024
The
development
of
simple,
effective,
economical,
and
environmentally
friendly
methods
for
removing
hazardous
substances
anthropogenic
origin
from
aquatic
systems
is
currently
one
the
greatest
challenges,
among
others,
due
to
variety
pollutants
transformations
they
may
undergo
in
environment.
In
recent
years,
there
has
been
an
increased
interest
adsorption
based
on
use
natural
polymers,
including
non-toxic
chitosan
(CS),
which
characterized
by
good
coating
properties,
biocompatibility,
biodegradability.
This
review
concerns
latest
developments
(since
2019)
application
novel
chitosan-based
materials
removal
(e.g.,
metal
metalloid
ions,
synthetic
dyes,
pharmaceuticals)
aqueous
solutions,
with
particular
emphasis
their
most
important
advantages
limitations,
as
well
potential
impact
sustainability.
Heliyon,
Journal Year:
2024,
Volume and Issue:
10(3), P. e24730 - e24730
Published: Jan. 21, 2024
Mining
wastewater
can
have
adverse
effects
on
the
ecosystem;
thus,
treatment
before
discharging
into
environment
is
of
utmost
importance.
This
manuscript
reports
effect
mining
environment.
Moreover,
currently
used,
effective
and
commercialised
mine
technologies
such
as
SAVMIN®,
SPARRO®,
Biogenic
sulphide,
DESALX®
are
reported
in
this
study.
These
integrate
two
or
more
separation
processes,
which
been
proven
to
be
for
high
recovery
salts
water
reuse.
Some
significantly
recover
>95%
water.
Modern
pilot-stage
laboratory-scale
systems
used
removal
metals
also
herein.
Since
some
generate
highly
toxic
sludge
other
waste
products,
management
generated
was
considered.
studies
focused
at
laboratory
level
using
adsorption
process.
Most
adsorbents
exhibit
promising
results;
however,
there
insufficient
research
reusability,
management,
economic
analysis
systems.
implementation
necessary.
Furthermore,
integration
precious
low
concentrations
desirable
addition
reclamation
achieve
circular
Materials,
Journal Year:
2024,
Volume and Issue:
17(23), P. 5770 - 5770
Published: Nov. 25, 2024
Chitosan,
a
natural
biopolymer
with
excellent
biocompatibility,
biodegradability,
and
modifiable
structure,
has
broad
applications
in
regenerative
medicine,
tissue
engineering,
food
packaging,
environmental
technology.
Its
abundance,
solubility
acidic
solutions,
capacity
for
chemical
modification
make
it
highly
adaptable
creating
specialized
derivatives
enhanced
properties.
Recent
advances
have
demonstrated
chitosan's
efficacy
composite
systems
regeneration,
drug
delivery,
antimicrobial
applications.
This
review
examines
unique
properties,
focus
on
its
antibacterial
activity
as
influenced
by
factors
like
pH,
concentration,
molecular
weight,
deacetylation
degree.
Additionally,
potential
sustainable,
non-toxic
material
eco-friendly
packaging
water
treatment
is
explored,
highlighting
the
growing
interest
chitosan
composites
other
polymers
metallic
nanoparticles
biomedical
