Journal of Hazardous Materials Letters,
Год журнала:
2021,
Номер
2, С. 100029 - 100029
Опубликована: Май 29, 2021
Subsurface
soil
naturally
experiences
dry-wet
and
freeze-thaw
cycles,
which
could
affect
the
leaching
of
previously
adsorbed
pollutants.
A
slow
release
poly-
perfluoroalkyl
substances
(PFAS)
from
impacted
subsurface
may
serve
as
a
long-term
diffuse
source
PFAS
to
groundwater.
Yet,
extent
these
weathering
conditions
is
unknown.
We
subjected
columns
packed
with
pre-adsorbed
perfluorooctanoic
acid
(PFOA)
cycles
observed
spike
in
PFOA
concentration
leachate
following
each
treatment
compared
no
treatment.
Weathering
released
high
colloids,
were
confirmed
by
particle-size
distribution
analysis,
SEM-EDS,
XRD.
Fractionation
water
sample
reveals
that
up
36
%
leached
was
associated
colloids.
Thus,
previous
studies
did
not
account
for
colloids
might
have
underestimated
soil.
Overall,
results
indicate
natural
can
enhance
colloid-associated
PFOA.
Therefore,
current
conceptual
site
models
quantify
zones
should
contribution
Water,
Год журнала:
2023,
Номер
15(14), С. 2534 - 2534
Опубликована: Июль 10, 2023
Given
the
prevailing
arid
climate
and
rapid
population
growth,
groundwater
resources
face
unprecedented
challenges
globally,
including
depletion,
seawater
intrusion,
contamination.
Managed
aquifer
recharge
(MAR)
technologies
have
emerged
as
valuable
solutions
to
address
these
pressing
issues.
However,
identifying
suitable
regions
for
MAR
activities
is
a
complex
task,
particularly
at
country
level.
Therefore,
in
this
study,
we
propose
robust
approach
that
combines
fuzzy
analytical
hierarchy
process
(AHP)
technique
order
of
preference
by
similarity
ideal
solution
(TOPSIS)
delineate
sites
structures.
The
proposed
model
was
applied
Djibouti,
hot,
dry,
water-stressed
country.
We
identified
set
nine
decision
criteria
conducted
pairwise
comparison
survey
determine
their
relative
importance.
Additionally,
TOPSIS
method
employed
integrate
layers
prioritize
study
area.
results
highlight
significance
rainfall,
slope,
NDVI
most
influential
parameters,
while
drainage
density
has
least
impact.
A
suitability
analysis
reveals
16.38%,
17.96%,
30.41%
very
high,
moderate
potential
activities,
respectively.
Furthermore,
sensitivity
demonstrates
stability
model,
affirming
usefulness
generated
map.
Wiley Interdisciplinary Reviews Water,
Год журнала:
2024,
Номер
11(5)
Опубликована: Май 23, 2024
Abstract
In
the
last
three
decades,
world
has
experienced
a
rapid
emergence
of
megacities.
The
increasing
demographics,
urbanization,
and
water
demand
brought
severe
undesired
effects
on
quantity
quality
their
resources.
A
prime
example
is
Lagos
(Nigeria,
West
Africa),
which
projected
to
become
world's
largest
city
by
2100,
faces
scarcity
challenges
common
other
megacities
developing
countries.
literature
review
reveals
vast
gap
between
regulated
supply,
inadequate
knowledge
information
current
state
(re)sources,
major,
yet
unregulated,
use
groundwater.
It
further
highlights
impacts
uncontrolled
wastewater
discharge
into
surface
waters
aquifers,
role
paved
surfaces
blocked
drainages
flooding,
supply
potable
water,
unsustainable
abstraction
Here,
we
examine
potential
managed
aquifer
recharge
(MAR)
address
these
recurrent
across
megacity.
analysis
opportunities
risks
associated
with
capture
wastewater,
storm
brackish
for
MAR.
These
waters,
after
appropriate
treatment
subsurface
storage
may
bridge
growing
supply–demand
mitigate
groundwater
(over)exploitation,
including
depletion,
saltwater
intrusion
land
subsidence.
Immediate
efforts
should
focus
improving
conceptual
quantitative
Lagos'
hydrogeology
resources
through
comprehensive
spatial–temporal
monitoring
socio‐economic
studies
access
use.
insights
provided
inform
fast‐growing
coastal
in
Africa
wider
world.
This
article
categorized
under:
Science
Water
>
Environmental
Change
Engineering
Water,
Health,
Sanitation
Human
Value
Hydrological
Processes
International Journal of River Basin Management,
Год журнала:
2024,
Номер
unknown, С. 1 - 15
Опубликована: Июнь 11, 2024
Groundwater
abstraction
has
increased
tremendously
due
to
population
growth,
urbanization,
and
industrial
expansions.
Managed
Aquifer
Recharge
(MAR)
been
a
promising
technique
for
increasing
freshwater
availability
in
response
water
demand
different
consumptions.
This
study
aimed
identify
suitable
zones
MAR
the
Diredawa
catchment,
eastern
Ethiopia
using
multi-criteria
decision
analysis
(MCDA).
The
seven
parameters
processed
were
soil
texture,
lithology,
slope,
land
use
cover,
drainage
density,
transmissivity,
quality
(NO3).
Each
criterion
was
evaluated
with
analytical
hierarchy
process
(AHP)
mapped
by
GIS.
sensitivity
conducted
map
removal
technique,
potential
validated
borehole
yield
data.
suitability
assorted
into
very
high,
moderate,
low,
low
classes,
representing
15.8%,
25.8%,
28.8%,
13.1%,
16.3%
areas.
mapping
is
highly
affected
lithological
variation.
alluvial
sediment,
upper
sandstone,
fractured
limestone
sandy
loam
texture
are
areas
implementing
MAR.
highest
site
located
western,
southwestern,
northern
parts
of
catchment.
will
serve
as
foundation
future
selection
structures,
aiming
enhance
groundwater
supply
sources,
improve
quality,
manage
urban
flooding
water-stressed
flood-prone
Journal of Hazardous Materials Letters,
Год журнала:
2021,
Номер
2, С. 100029 - 100029
Опубликована: Май 29, 2021
Subsurface
soil
naturally
experiences
dry-wet
and
freeze-thaw
cycles,
which
could
affect
the
leaching
of
previously
adsorbed
pollutants.
A
slow
release
poly-
perfluoroalkyl
substances
(PFAS)
from
impacted
subsurface
may
serve
as
a
long-term
diffuse
source
PFAS
to
groundwater.
Yet,
extent
these
weathering
conditions
is
unknown.
We
subjected
columns
packed
with
pre-adsorbed
perfluorooctanoic
acid
(PFOA)
cycles
observed
spike
in
PFOA
concentration
leachate
following
each
treatment
compared
no
treatment.
Weathering
released
high
colloids,
were
confirmed
by
particle-size
distribution
analysis,
SEM-EDS,
XRD.
Fractionation
water
sample
reveals
that
up
36
%
leached
was
associated
colloids.
Thus,
previous
studies
did
not
account
for
colloids
might
have
underestimated
soil.
Overall,
results
indicate
natural
can
enhance
colloid-associated
PFOA.
Therefore,
current
conceptual
site
models
quantify
zones
should
contribution
