Environmental Science & Technology Letters,
Год журнала:
2024,
Номер
11(2), С. 114 - 121
Опубликована: Янв. 22, 2024
Shale
gas
extraction
has
raised
environmental
concerns
on
regional
water
resources.
Horizontal
drilling
is
a
process
in
which
fluids
containing
complex
organic
and
inorganic
chemicals
are
intensively
applied.
Accidental
spill
improper
disposal
of
related
wastes
might
pose
risks
to
surrounding
groundwater
environment.
Given
ground
quality,
persistent,
mobile,
toxic
(PMT)
very
persistent
mobile
(vPvM)
substances
should
be
particular
attention.
However,
recent
research
rarely
focused
chemical
compositions
fluids,
the
harmful
PMT/vPvM
remain
unknown.
In
this
study,
we
utilized
nontarget
screening
strategy
detect
identify
compounds
collected
southwest
China.
Specifically,
total
number
371
were
detected
main
fraction
was
alicyclic
compounds.
Later,
an
original
machine
learning
model
developed
by
us
applied
candidate
among
Our
study
identified
29
substances,
thus
providing
list
prioritized
for
early
warning
risk
assessment
contamination.
Environmental Science & Technology,
Год журнала:
2023,
Номер
57(44), С. 17022 - 17031
Опубликована: Окт. 24, 2023
Cooking
emission
is
known
to
be
a
significant
anthropogenic
source
of
air
pollution
in
urban
areas,
but
its
toxicities
are
still
unclear.
This
study
addressed
the
fine
particulate
matter
(PM2.5)
and
gaseous
organics
by
combining
chemical
fingerprinting
analysis
with
cellular
assessments.
The
cytotoxicity
reactive
oxygen
species
activity
were
∼1.9
∼8.3
times
higher
than
those
PM2.5,
respectively.
Moreover,
these
values
per
unit
mass
PM2.5
∼7.1
∼15.7
collected
from
ambient
Shanghai.
total
oleic
acid
equivalent
quantities
for
carcinogenic
toxic
respiratory
effects
organics,
as
estimated
using
predictive
models
based
on
quantitative
structure-property
relationships,
1686
±
803
430
176
μg/mg
Both
predicted
consistent
assessment.
These
health
risks
primarily
attributed
high
relative
content
equivalency
factor
organic
compounds
present
gas
phase,
including
7,9-di-tert-butyl-1-oxaspiro(4,5)deca-6,9-diene-2,8-dione,
2-ethylhexanoic
acid,
2-phenoxyethoxybenzene.
Furthermore,
fatty
acids
identified
prominent
markers
cooking-related
emissions.
obtained
results
highlight
importance
control
measures
cooking-emitted
reduce
personal
exposure
risks.
Environmental Science & Technology,
Год журнала:
2023,
Номер
57(15), С. 6052 - 6062
Опубликована: Апрель 3, 2023
Oxidizing
triplet
excited
states
of
organic
matter
(3C*)
drive
numerous
reactions
in
fog/cloud
drops
and
aerosol
liquid
water
(ALW).
Quantifying
oxidizing
concentrations
ALW
is
difficult
because
3C*
probe
loss
can
be
inhibited
by
the
high
levels
dissolved
(DOM)
copper
particle
water,
leading
to
an
underestimate
concentrations.
In
addition,
illuminated
contains
singlet
molecular
oxygen
(1O2*),
which
interfere
with
probes.
Our
overarching
goal
find
a
that
has
low
inhibition
DOM
Cu(II)
sensitivity
1O2*.
To
this
end,
we
tested
12
potential
probes
from
variety
compound
classes.
Some
are
strongly
DOM,
while
others
react
rapidly
One
candidates,
(phenylthiol)acetic
acid
(PTA),
seems
well
suited
for
conditions,
mild
fast
rate
constants
triplets,
but
it
also
weaknesses,
including
pH-dependent
reactivity.
We
evaluated
performance
both
PTA
syringol
(SYR)
as
aqueous
extracts
particulate
matter.
While
less
sensitive
than
SYR,
results
lower
concentrations,
possibly
reactive
weakly
triplets.
Frontiers in Microbiology,
Год журнала:
2021,
Номер
12
Опубликована: Окт. 29, 2021
Ocean
aerobiology
is
defined
here
as
the
study
of
biological
particles
marine
origin,
including
living
organisms,
present
in
atmosphere
and
their
role
ecological,
biogeochemical,
climate
processes.
Hundreds
trillions
microorganisms
are
exchanged
between
ocean
daily.
Within
a
few
days,
tropospheric
transport
potentially
disperses
over
continents
oceans.
There
need
to
better
identify
quantify
aerobiota,
characterize
time
spans
distances
microorganisms'
atmospheric
transport,
determine
whether
acclimate
conditions
remain
viable,
or
even
grow.
Exploring
microbial
habitat
fundamental
for
understanding
consequences
dispersal
will
expand
our
knowledge
biodiversity,
biogeography,
ecosystem
connectivity
across
different
environments.
Marine
organic
matter
chemically
transformed
atmosphere,
remineralization
back
CO2.
The
magnitude
these
transformations
insignificant
context
annual
carbon
cycle,
but
may
be
significant
sink
recalcitrant
long
(∼104
years)
timescales.
In
addition,
sea
spray
aerosol
plays
Earth's
radiative
budget
by
scattering
solar
radiation,
indirectly
affecting
cloud
properties.
generally
poor
source
condensation
nuclei
(CCN),
ice
nucleating
(INPs),
formation
mixed-phase
clouds.
This
review
show
that
biogenic
an
impactful,
poorly
constrained,
ecosystems,
biogeochemical
processes,
system.
Further
work
needed
feedbacks
ecosystems
order
integrate
this
complexity
into
Earth
System
models,
facilitating
future
predictions.
Environmental Science & Technology,
Год журнала:
2022,
Номер
56(9), С. 5409 - 5420
Опубликована: Апрель 8, 2022
Volatile
organic
compound
(VOC)
emissions
from
pyrolysis
of
widely
used
biomass
are
expected
to
increase
significantly
under
the
carbon
neutrality
target.
However,
dynamic
and
evolution
mechanism
biomass-VOCs
remain
unclear,
hindered
by
complex
reactions
offline
measurements.
Here,
we
propose
a
novel
covariant
interpret
emission
heterogeneities,
sequential
temperature
responses,
evolved
correlations
both
VOCs
residual
functional
groups
(RFGs)
during
corn
straw
(CS),
wood
pellet
(WP),
semibituminous
coal
(SBC)
pyrolysis.
An
innovative
combination
online
thermogravimetric–Fourier
transform
infrared–gas
chromatography/mass
spectrometry
two
dimensional-correlation
spectroscopy
was
applied.
The
relative
percentages
CS/WP-VOCs
were
higher
than
those
SBC-VOCs,
most
tended
have
relatively
small
skeletons
as
average
oxidation
state
increased.
With
increased
low
high
CS/WP
pyrolysis,
primary
response
(acids
→
phenols/esters
alcohols/ethers/aldehydes/ketones
hydrocarbons/aromatics)
corresponded
RFG
(hydroxyl
−CH3/–CH2–/–CH
aliphatic
ethers
conjugated
ketones).
Compared
with
regularity
for
gas–solid
products
SBC
exhibited
temperature-dependent
responses
oxidation-induced
variability.
These
insights
provide
favorable
strategies
monitoring
system
facilitate
priority
removal
fuels–VOCs.
