Water Resources Research,
Год журнала:
2023,
Номер
59(1)
Опубликована: Янв. 1, 2023
Abstract
We
present
a
methodology
to
quantify
the
impact
of
model
structure
and
parametric
uncertainty
on
formulations
targeting
biotransformation
processes
Emerging
Contaminants
in
subsurface
water
resources.
The
study
is
motivated
by
recognizing
that
modeling
bio‐mediated
reactions
recalcitrant
compounds
soil
aquifers
plagued
uncertainty.
At
same
time,
process‐based
models
often
require
parameterization
complex
physico‐chemical
processes,
situation
which
exacerbated
paucity
direct
observations.
Thus,
assessment
formulation
tools
capable
balance
complexity
reliability
key
challenge.
strategy
proposed
here
aims
at
pairing
applying
suite
quantitative
starting
from
prior
diagnosis
multiple
sources
leading
parameter
estimation
selection
presence
limited
number
illustrated
through
application
multi‐step,
reactive
scenario
involving
pharmaceutical
diclofenac
(DCF)
groundwater.
Our
framework
includes
four
plausible
models.
These
are
obtained
successive
simplifications
recently
developed
highly
model.
Such
accomplished
consistent
with
results
comprehensive
Multi‐Model
Global
Sensitivity
Analysis.
latter
allows
ranking
levels
influence
system
outputs
incorporating
effects
uncertainties.
kinetic
loop‐initiating
process
(DCF
nitrosation,
linked
temporal
evolution
N‐cycle
components)
documented
as
dominating
explaining
variability
environmental
interest.
Model
discrimination
criteria
suggest
simplified
counterpart
reference
favored
interpret
available
data.
approach
can
assist
interpretation
prototyping
wide
range
contaminant
objective
also
for
purpose
developing
credible
(environmental)
risk
designing
experimental
sampling
campaigns.
The Science of The Total Environment,
Год журнала:
2021,
Номер
811, С. 152471 - 152471
Опубликована: Дек. 14, 2021
Groundwater
is
a
critical
resource
enabling
adaptation
due
to
land
use
change,
population
growth,
environmental
degradation,
and
climate
change.
It
can
be
driver
of
change
adaptation,
as
well
effectively
mitigate
impacts
brought
about
by
range
human
activities.
quality
key
assessing
groundwater
resources
we
need
improve
our
understanding
coverage
threats
if
are
sustainably
not
further
burden
future
generations
limiting
and/or
increasing
treatment
or
abstraction
costs.
Good
progress
on
Sustainable
Development
Goals,
but
achievement
those
goals
most
affected
contamination
often
hindered
lack
enable
adaptation.
A
exist,
both
natural
anthropogenic,
which
may
constrain
use.
However,
provides
good
water
for
purposes
the
important
in
many
settings.
This
special
issue
explores
some
challenges
face
today
opportunities
solutions
bring
enhance
safe
Legacy
anthropogenic
contaminants
geogenic
documented
certain
places,
such
N
America,
Europe
parts
Asia.
there
real
data
accessibility
regions,
even
more
common
contaminants.
paucity
information
restrict
ability
manage
protect
sources.
Compared
surface
quality,
large
scale
assessments
still
scarce
rely
inadequate
sets.
Better
access
existing
sets
research
needed
threats.
Identification
quantification
these
will
support
wise
protection
this
subsurface
resource,
allow
society
adequately
address
challenges,
help
communities
realise
full
potential
groundwater.
Environmental Pollution,
Год журнала:
2023,
Номер
327, С. 121626 - 121626
Опубликована: Апрель 11, 2023
The
presence
and
distribution
of
emerging
organic
contaminants
(EOCs)
in
freshwater
environments
is
a
key
issue
India
globally,
particularly
due
to
ecotoxicological
potential
antimicrobial
resistance
concerns.
Here
we
have
investigated
the
composition
spatial
EOCs
surface
water
along
∼500
km
segment
iconic
River
Ganges
(Ganga)
tributaries
middle
Gangetic
Plain
Northern
India.
Using
broad
screening
approach,
11
samples,
identified
51
EOCs,
comprising
pharmaceuticals,
agrochemicals,
lifestyle
industrial
chemicals.
Whilst
majority
detected
were
mixture
pharmaceuticals
chemicals
(and
sucralose)
occurred
at
highest
concentrations.
Ten
are
priority
compounds
(e.g.
sulfamethoxazole,
diuron,
atrazine,
chlorpyrifos,
perfluorooctane
sulfonate
(PFOS),
perfluorobutane
sulfonate,
thiamethoxam,
imidacloprid,
clothianidin
diclofenac).
In
almost
50%
sulfamethoxazole
concentrations
exceeded
predicted
no-effect
(PNECs)
for
ecological
toxicity.
A
significant
downstream
reduction
was
observed
Ganga
between
Varanasi
(Uttar
Pradesh)
Begusarai
(Bihar),
likely
reflecting
dilution
effects
associated
with
three
major
tributaries,
all
considerably
lower
EOC
than
main
channel.
Sorption
and/or
redox
controls
some
clopidol),
as
well
relatively
high
degree
mixing
within
river.
We
discuss
environmental
relevance
persistence
several
parent
(notably
carbamazepine,
metribuzin
fipronil)
transformation
products.
Associations
other
hydrochemical
parameters
including
excitation
emission
matrix
(EEM)
fluorescence
indicated
positive,
significant,
compound-specific
correlations
tryptophan-,
fulvic-
humic-like
fluorescence.
This
study
expands
baseline
characterization
Indian
contributes
an
improved
understanding
sources
on
large
river
systems.
The Science of The Total Environment,
Год журнала:
2023,
Номер
888, С. 164161 - 164161
Опубликована: Май 15, 2023
The
objectives
of
this
study
are
to
identify
per-
and
polyfluoroalkyl
substances
(PFAS)
in
Pennsylvania
surface
waters,
corresponding
associations
with
potential
sources
PFAS
contamination
(PSOC)
other
parameters,
compare
raw
water
concentrations
human
ecological
benchmarks.
Surface
samples
from
161
streams
were
collected
September
2019
analyzed
for
33
target
chemistry.
Land
use
physical
attributes
upstream
catchments
geospatial
counts
PSOC
local
summarized.
hydrologic
yield
the
sum
(∑PFAS)
each
stream
was
computed
by
normalizing
site's
load
drainage
area
catchment.
Utilizing
conditional
inference
tree
analysis,
percentage
development
(>7.58
%)
identified
as
a
primary
driver
∑PFAS
yields.
When
removed
yields
closely
related
chemistry
associated
landscape
alteration
(e.g.,
or
agricultural
cropland),
such
total
nitrogen,
chloride,
ammonia,
but
also
count
pollution
control
facilities
(agricultural,
industrial,
stormwater,
and/or
municipal
waste
abatement
facilities).
In
oil
gas
regions,
combined
sewage
outfalls.
Sites
surrounded
≥2
electronic
manufacturing
had
elevated
(median
=
241
ng/s/km2).
Study
results
critical
guide
future
research,
regulatory
policy,
best
practices
that
will
mitigate
contamination,
communication
health
risks
exposure
waters.
