Environmental Science & Technology,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 26, 2024
Industrial
activities
are
a
major
source
of
organophosphorus
flame
retardants
(OPFRs)
and
plasticizers
in
aquatic
environments.
This
study
investigated
the
distribution
40
OPFRs
river
impacted
by
industrial
manufacturing
plants
Eastern
China
target
analysis.
Nontarget
analysis
using
high-resolution
mass
spectrometry
was
further
employed
to
identify
novel
compounds
(NOPs).
Thirty-four
were
detected
water
samples,
with
total
concentrations
62.9–1.06
×
103
ng/L
(median:
455
ng/L).
Triphenylphosphine
oxide
diphenyl
phosphoric
acid
ubiquitously
up
620
127
ng/L,
respectively.
Among
26
identified
NOPs,
17
reported
for
first
time
environment,
including
14
organophosphate
esters
(especially
4
heterocycles
3
oligomers),
2
organophosphites,
an
organophosphonate.
Bis(2,4-di-tert-butylphenyl)
hydrogen
phosphate
2,2-dimethylpropoxy(propyl)phosphinic
high
predicted
persistence
or
toxicity
widely
detected,
semiquantified
990
1.0
Structurally
similar
exhibited
consistent
variation
trends,
suggesting
common
emission
source.
Estimated
annual
discharges
sea
20.6–37.0
kg/yr
30.8–161
NOPs.
These
findings
indicate
that
contribute
NOPs
catchment
its
estuary,
posing
ecological
risks
both
terrestrial
marine
Environmental Science & Technology,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 20, 2025
Greenhouses
offer
optimum
growth
conditions
for
plants
and
create
a
unique
microenvironment
workers
who
work
in
them.
Information
about
human
exposure
to
UVAs
particularly
those
employed
agricultural
greenhouses
remains
unknown.
In
the
present
study,
North
China
were
comprehensively
analyzed
screened.
The
geometric
mean
concentration
of
∑10UVAs
greenhouse
plastic
films
(132
ng/g)
was
found
significantly
higher
than
that
control
(27.1
(p
<
0.001),
with
UV-531
(35.9
UV-326
(24.9
as
dominant
components
used
films,
followed
by
soil
fine
particles,
indicating
elevated
levels
greenhouses.
Temperature
acquired
main
factor
release
Consistently,
relatively
high
UV-360
UV-P
identified
urine
workers.
quantitative
assessment
UVA
risks
conducted
using
Monte
Carlo
simulation,
which
contact
pathway,
accounting
88.22%
total
estimated
exposure.
Importantly,
integrating
environmental
assessment,
ADME
(absorption,
distribution,
metabolism,
excretion)
parameters,
urinary
biomonitoring
data,
UV-328
UV-234
highest-priority
congeners
occupational
health
monitoring
among
study
is
first
combine
metabolic
behavior
prioritization
risks,
emphasizing
urgent
need
early
intervention
toward
safety
Polymer Engineering and Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 27, 2025
ABSTRACT
The
demand
for
sustainable
resources
in
production
and
improvement
of
various
properties
polymer
materials
is
increasing.
In
this
study,
cellulose
sulfate
(CS)
was
synthesized
from
microcrystalline
used
as
an
additive
at
different
ratios
(5%
10%)
the
semirigid
polyurethane
foam
(SrPUF).
effects
CS
on
mechanical
properties,
combustion
behavior,
thermal
stability
SrPUF
were
extensively
investigated
by
rigorous
tests
such
tensile
strength,
flexural
UL
94
vertical
burn
test,
thermogravimetric
analysis
(TGA).
findings
indicate
that
incorporating
a
10%
contributed
to
considerable
advancement
with
increase
51.39%.
Additionally,
strength
improved
markedly,
rising
47
kPa
impressive
147
kPa.
test
showed
flame
spread
rate
containing
experienced
substantial
decrease,
while
maximum
degradation
temperature
(
T
dmax
)
increased
384°C
405°C.
char
yields
0%,
5%,
added
5.61%,
6.84%,
13.01%,
respectively.
conclusion,
study
demonstrates
doping
SrPU
significantly
enhances
its
durability
both
aspects.
