Identifying Candidate Persistent, Mobile, and Toxic (PMT) and Very Persistent and Very Mobile (vPvM) Substances in Shale Gas Drilling Fluids by Combining Nontarget Analysis and Machine Learning Model
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.
Язык: Английский
Combining eDNA and morphological approaches to reveal the impacts of long-term discharges of shale gas wastewaters on receiving waters
Water Research,
Год журнала:
2022,
Номер
222, С. 118869 - 118869
Опубликована: Июль 15, 2022
Язык: Английский
Identifying and prioritizing organic toxicants in treated flowback and produced water from shale gas exploitation sites using an integrative effect-directed analysis and nontarget screening method
Water Research,
Год журнала:
2025,
Номер
unknown, С. 123311 - 123311
Опубликована: Фев. 1, 2025
Язык: Английский
Effect of laser powers on the mechanical properties 27SiMn steel with Inconel 718 cladding coatings
Materials Research Express,
Год журнала:
2022,
Номер
9(9), С. 096511 - 096511
Опубликована: Сен. 1, 2022
Abstract
In
order
to
know
the
influence
of
laser
power
on
steel
(27SiMn)
used
for
repairing
column
with
Inconel
718
powder
materials,
and
obtain
optimal
parameters
best
mechanical
properties
cladding
layer,
microstructure,
tensile
fracture
morphology
alloy
under
three
powers
(1800
W,
2100
W
2400
W)
were
investigated
by
using
single-factor
variable
method,
keeping
scanning
speed,
feeding
amount
spot
diameter
unchanged.
The
results
show
that
increase
coating
prepared
surface
gradually
decreased,
when
is
1800
W.
yield
strength
at
was
61.7%
higher
than
substrate,
its
value
970
MPa.
elongation
reduced
50%
compared
7%.
microstructure
27SiMn
(Ni,
Fe,
Cr)
phase
Ni
3
Fe
phase,
mainly
composed
uniform
cellular
crystals.
This
study
provides
a
valuable
reference
additive
manufacturing
industrial
materials
laser-cladding
coating.
Язык: Английский
Identifying persistent, mobile and toxic (PMT) organic compounds detected in shale gas wastewater
The Science of The Total Environment,
Год журнала:
2022,
Номер
858, С. 159821 - 159821
Опубликована: Ноя. 2, 2022
Shale
gas
exploitation
is
a
water-intensive
process,
generating
flowback
and
produced
water
(FPW)
with
complex
chemical
compositions.
Reuse,
disposal
treatment
of
FPW
are
increasing
concern,
because
the
potential
risk
contamination
to
surrounding
aquatic
environment
drinking
sources
when
emitted.
Among
numerous
organic
substances
present
in
FPW,
particular
concern
those
that
persistent,
mobile
toxic
(PMT)
very
persistent
(vPvM).
PMT
vPvM
have
greatest
spread
groundwater
hardest
remediate.
This
study
presents
outcome
literature
review
identify
compounds
were
previously
detected
FPW.
The
162
target
identified
from
this
assessed
see
if
they
can
be
considered
PMT/vPvM
based
on
their
substance
properties.
Our
results
indicated
most
"not
PMT",
accounting
for
108
(66.7
%)
compouds.
In
total
22
or
likely
meet
criteria
more
data
available.
Examples
include
anthracene,
1,4-dioxane
1,4-dichlorobenzene.
should
prioritized
management
measures
monitoring
order
protect
regional
resources.
Язык: Английский
Analysis of Potential Environmental Risks in the Hydraulic Fracturing Operation in the “La Luna” Formation in Colombia
Sustainability,
Год журнала:
2024,
Номер
16(5), С. 2063 - 2063
Опубликована: Март 1, 2024
This
article
presents
an
in-depth
analysis
of
potential
environmental
risks
associated
with
hydraulic
fracturing
operations
within
the
“La
Luna”
formation
in
Colombia.
Using
Conesa
methodology,
it
assesses
impacts
unconventional
reservoir
production
Colombia,
including
water
usage,
chemical
additives,
air
emissions,
and
for
groundwater
contamination.
study
incorporates
comprehensive
data
on
geological
characteristics,
operational
procedures,
conditions
specific
to
region.
highlights
need
a
proactive
approach
managing
The
findings
underscore
importance
implementing
robust
regulatory
measures,
monitoring
systems,
industry’s
best
practices
mitigate
prevent
adverse
impacts.
research
contributes
ongoing
global
dialogue
implications
regions
sensitive
ecological
conditions.
reservoirs
are
widely
recognized
as
general
consensus;
however,
absence
applied
studies
rigor
explicit
methodology
Andean
countries
this
addresses
gap
by
proposing
detailed
structured
assess
reservoirs.
Emphasizing
knowing
characteristics
fluids,
that
critical
information
is
only
revealed
drilling
exploration
wells
PVT
(pressure,
volume,
temperature)
analysis.
Obtaining
crucial
shaping
mitigation
thus
allowing
formulation
management
plan
tailored
precise
contextualized
closing
knowledge
promotes
more
sustainable
exploitation
geographical
context.
used
proved
its
effectiveness
accurately
quantifying
each
alterations
inherent
process
La
Luna
formation.
results
obtained
allowed
identification
points
most
susceptible
impacts,
serving
solid
basis
elaboration
plan.
strategic
not
enabled
delineation
measures
but
also
facilitated
selection
appropriate
locations
implementation
plan,
maximizing
corrective
actions.
It
noteworthy
successful
application
context
evidences
versatility
applicability
approach,
consolidating
valuable
tool
assessment
effective
planning
industry.
Язык: Английский
Biodegradation of Aromatic Compounds Under Hypersaline Conditions: Comparing Aerobic Biofilm Reactors with Conventional Activated Sludge
Environmental Engineering Science,
Год журнала:
2023,
Номер
40(11), С. 514 - 523
Опубликована: Июль 27, 2023
Biofilm
formation
can
help
to
mitigate
the
stress
placed
on
organisms
during
biological
treatment
of
high-salinity
wastewaters,
such
as
“produced
water”
resulting
from
oil
and
gas
extraction.
This
study
investigated
implementation
two
different
biofilm-based
reactors,
activated
carbon
an
adsorptive
biofilm
surface
(Bio-GAC)
aerobic
granular
sludge
(AGS),
a
conventional
(CAS)
reactor
for
synthetic
produced
water
(PW)
under
hypersaline
conditions
(85,000
mg/L
NaCl).
A
mixture
benzyl
alcohol,
o-cresol,
phenol
were
used
source
with
concentrations
100,
250
mg/L,
respectively.
The
performance
Bio-GAC
was
higher
than
AGS,
overall
removal
efficiencies
aromatic
compounds
100%
93%.
presence
catechol
in
all
three
reactors
reaction
cycle
confirmed
that
biodegradation
occurring.
CAS
significantly
lower
terms
efficiency
(73%)
resilience
high
salinity.
Scanning
electron
microscopy
showed
biosystems
establish
stronger
texture.
Microbial
community
analysis
biosystem
type
played
crucial
role
selecting
microbiome
structure.
These
findings
show
be
successfully
biodegrade
toxic
organic
contaminants
environment,
hybrid
process
is
particularly
promising
treating
PW.
Язык: Английский
Effects of high pressure and temperature conditions on the chemical fate of flowback water related chemicals
The Science of The Total Environment,
Год журнала:
2023,
Номер
888, С. 163888 - 163888
Опубликована: Май 8, 2023
Environmental
risk
assessment
is
generally
based
on
atmospheric
conditions
for
the
modelling
of
chemical
fate
after
entering
environment.
However,
during
hydraulic
fracturing,
chemicals
may
be
released
deep
underground.
This
study
therefore
focuses
effects
high
pressure
and
temperature
in
flowback
water
to
determine
whether
current
environmental
models
need
adapted
context
downhole
activities.
Crushed
shale
were
mixed
exposed
different
(25–100
°C)
(1–450
bar)
investigate
they
have
fate.
Samples
analysed
using
LC-HRMS
non-target
screening.
The
results
show
that
both
can
impact
fracturing
related
by
increasing
or
decreasing
concentrations
via
processes
transformation,
sorption,
degradation
and/or
dissolution.
Furthermore,
degree
direction
change
specific.
lower
equal
a
factor
five,
but
few
individual
compounds
exceed
this
five.
suggests
surface
used
an
approximation
under
applying
additional
five
account
these
uncertainties.
More
accurate
insight
into
gained
studying
fluid
known
composition
increased
variability
including
concentration,
salinity
pH
as
variables.
Язык: Английский