Electrophoresis,
Journal Year:
2020,
Volume and Issue:
42(7-8), P. 834 - 868
Published: Dec. 31, 2020
Electroosmotic
flow
(EOF),
a
consequence
of
an
imposed
electric
field
onto
electrolyte
solution
in
the
tangential
direction
charged
surface,
has
emerged
as
important
phenomenon
electrokinetic
transport
at
micro/nanoscale.
Because
their
ability
to
efficiently
pump
liquids
miniaturized
systems
without
incorporating
any
mechanical
parts,
electroosmotic
methods
for
fluid
pumping
have
been
adopted
versatile
applications-from
biotechnology
environmental
science.
To
understand
mechanism,
it
is
crucial
identify
role
ionically
polarized
layer,
so-called
electrical
double
layer
(EDL),
which
forms
vicinity
solid-liquid
interface,
well
characteristic
length
scale
conducting
media.
Therefore,
this
tutorial
review,
we
summarize
development
models
from
historical
point
view
elucidate
interplay
and
configuration
water
molecules
ions
interface.
Moreover,
discuss
physicochemical
phenomena
owing
interaction
when
media
decreased
microscale
nanoscale.
Finally,
highlight
pioneering
studies
most
recent
works
on
electro
osmotic
devoted
both
theoretical
experimental
aspects.
Water Research,
Journal Year:
2022,
Volume and Issue:
213, P. 118161 - 118161
Published: Feb. 3, 2022
Electrokinetic
techniques
represent
a
valuable
approach
to
enhance
solute
transport,
reactant
delivery
and
contaminant
degradation
in
complex
environmental
matrices,
such
as
contaminated
soil
groundwater,
have
great
potential
for
the
remediation
of
many
organic
inorganic
pollutants.
This
study
investigates
interplay
between
key
electrokinetic
transport
mechanisms,
electromigration
electroosmosis,
physically
heterogeneous
porous
media
its
impact
on
tracer
distribution,
mixing
efficiency.
We
perform
experiments
multidimensional
setup,
considering
different
types
heterogeneities,
injected
tracers
reactants,
well
background
electrolyte
pore
water
with
chemical
composition
pH.
show
that
EK
is
significantly
affected
by
physical
due
interaction
hydraulic
processes,
chemistry
plays
role
magnitude
spatial
distribution
electroosmotic
fluxes.
The
latter
affect
overall
charged
non-charged
species,
including
migration
velocity
plumes,
their
patterns,
spreading
extent
spatio-temporal
evolution
reactive
zones
media.
Process-based
numerical
modeling
allowed
us
interpret
experimental
observations
disentangle
coupled
effects
physical,
electrostatic
processes
multidimensional,
setups.
Besides
elucidating
mechanisms
controlling
results
this
also
important
implications
practical
field
implementation
approaches
intrinsically
subsurface
systems.
Environmental Modelling & Software,
Journal Year:
2021,
Volume and Issue:
145, P. 105199 - 105199
Published: Sept. 15, 2021
porousMedia4Foam
is
a
package
for
solving
flow
and
transport
in
porous
media
using
OpenFOAM®
-
popular
open-source
numerical
toolbox.
We
introduce
highlight
the
features
of
new
generation
hydro-geochemical
module
implemented
within
porousMedia4Foam,
which
relies
on
micro-continuum
concept
makes
it
possible
to
investigate
processes
occurring
at
multiple
scales
i.e.
pore-scale,
reservoir-scale
hybrid-scale.
Geochemistry
handled
by
third
party
(e.g.
PHREEQC)
that
coupled
solver
OpenFOAM®.
conducted
benchmarks
across
different
validate
accuracy
our
simulator.
further
looked
evolution
mineral
dissolution/precipitation
fractured
system.
Application
fields
this
include
investigation
hydro-bio-geochemical
critical
zone,
modelling
contaminant
aquifers,
as
well
assessment
confinement
performance
geological
barriers.
Environmental Science & Technology,
Journal Year:
2022,
Volume and Issue:
56(8), P. 5049 - 5061
Published: April 4, 2022
The
dissolution
of
sulfide
minerals
can
lead
to
hazardous
arsenic
levels
in
groundwater.
This
study
investigates
the
oxidative
natural
As-bearing
and
related
release
under
flow-through
conditions.
Column
experiments
were
performed
using
reactive
(arsenopyrite
löllingite)
embedded
a
sandy
matrix
injecting
oxic
solutions
into
initially
anoxic
porous
media
trigger
mineral
dissolution.
Noninvasive
oxygen
measurements,
analyses
ionic
species
at
outlet,
scanning
electron
microscopy
allowed
tracking
propagation
fronts,
progress,
change
surface
composition.
Process-based
transport
simulations
quantitatively
interpret
geochemical
processes.
experimental
modeling
outcomes
show
that
pore-water
acidity
exerts
key
control
on
since
it
determines
precipitation
secondary
phases
causing
sequestration
passivation
surfaces.
impact
strongly
depends
flow
velocity
spatial
distribution
minerals.
These
results
highlight
fundamental
interplay
hydrochemical
hydrodynamic
conditions
mobilization
from
systems.
Water Resources Research,
Journal Year:
2024,
Volume and Issue:
60(1)
Published: Jan. 1, 2024
Abstract
An
accurate
mechanistic
understanding
of
solute
diffusion
in
partially
saturated
clays
is
critical
for
assessing
the
safety
deep
geological
repositories
radioactive
waste.
In
this
study,
a
pore‐scale
numerical
framework
developed
to
simulate
water
and
ion
clays.
First,
two‐phase
Shan‐Chen
Lattice
Boltzmann
method
employed
establish
liquid‐gas
distribution
reconstructed
three‐dimensional
pore
geometry
clay.
equivalent
also
validated
improve
stability
solution
at
liquid/gas
interface
corresponding
steep
variations
concentration
coefficient
tracer.
By
using
mobility‐distance
relationship
from
molecular
simulations,
Fick's
law
numerically
solved
nanopores,
while
coupled
Poisson‐Boltzmann‐Nernst‐Planck
equations
are
under
influence
electrical
double
layer
(EDL).
Our
model
reveals
that
decrease
relative
effective
coefficients
during
desaturation
more
pronounced
ions
than
water,
due
additional
transport
pathway
tracers
gas
phase.
The
obtained
tritiated
agree
well
with
reported
data
compacted
sedimentary
rocks.
comparing
local
electric
potential
concentrations
single
pores,
simulation
results
suggest
EDL
unsaturated
has
complex
on
fully
water‐saturated
conditions.
This
study
provides
insights
into
processes
solutes
Water Resources Research,
Journal Year:
2021,
Volume and Issue:
57(8)
Published: Aug. 1, 2021
Abstract
Advanced
reactive
transport
models
of
fluid
flow
and
solute
in
subsurface
porous
media
are
instrumental
for
the
assessment
contaminant
environmental
fate
design
situ
remediation
interventions.
However,
increasing
complexity
process‐based
simulators
often
leads
to
long
runtimes,
which
poses
severe
restrictions
tasks
that
require
numerous
model
evaluations.
To
overcome
this
limitation,
we
demonstrate
how
machine
learning
surrogate
models,
trained
on
outputs
a
limited
number
simulations,
can
predict
evolution
complex
systems.
We
focus
electrokinetic
enhanced
bioremediation
chlorinated
solvents
low‐permeability
media,
is
an
technology
entailing
suite
coupled
physical,
chemical,
biological
processes.
A
process‐based,
multicomponent
model,
capable
describing
key
mechanisms
transport,
setup
two‐dimensional
domain.
The
accounts
electromigration
electroosmosis,
electrostatic
interactions
between
charged
species,
chemistry
pore
water
solution,
microbially
mediated
degradation
organic
compounds,
dynamics
different
degraders.
develop
response
surface
framework
using
artificial
neural
network
as
approximation
function
show
has
capability
flexibility
capture
allows
computationally
efficient
exploration,
sensitivity
analysis,
uncertainty
quantification.
