Materials,
Journal Year:
2022,
Volume and Issue:
15(3), P. 1053 - 1053
Published: Jan. 29, 2022
The
remediation
of
water
streams,
polluted
by
various
substances,
is
important
for
realizing
a
sustainable
future.
Magnetic
adsorbents
are
promising
materials
wastewater
treatment.
Although
numerous
techniques
have
been
developed
the
preparation
magnetic
adsorbents,
with
effective
adsorption
performance,
reviews
that
focus
on
synthesis
methods
treatment
and
their
material
structures
not
reported.
In
this
review,
advancements
in
removal
substances
from
streams
has
comprehensively
summarized
discussed.
Generally,
categorized
into
five
groups,
as
follows:
direct
use
particles
attachment
pre-prepared
particles,
preprepared
co-synthesis
particles.
main
improvements
advanced
involved
making
conventional
less
energy
intensive,
more
efficient,
simpler
process,
while
maintaining
or
increasing
performance.
key
challenges,
such
enhancement
performance
design
sophisticated
structures,
discussed
well.
Water Research X,
Journal Year:
2019,
Volume and Issue:
4, P. 100029 - 100029
Published: April 6, 2019
Eutrophication
and
the
resulting
formation
of
harmful
algal
blooms
(HAB)
causes
huge
economic
environmental
damages.
Phosphorus
(P)
from
sewage
effluent
agricultural
run-off
has
been
identified
as
a
major
cause
for
eutrophication.
Phosphorous
concentrations
greater
than
100
μg
P/L
are
usually
considered
high
enough
to
The
strictest
regulations
however
aim
restrict
concentration
below
10
P/L.
Orthophosphate
(or
phosphate)
is
bioavailable
form
phosphorus.
Adsorption
often
suggested
technology
reduce
phosphate
less
even
with
advantages
low-footprint,
minimal
waste
generation
option
recover
phosphate.
Although
many
studies
report
on
adsorption,
there
insufficient
information
regarding
parameters
that
necessary
evaluate
its
application
large
scale.
This
review
discusses
main
affect
economics
adsorption
highlights
research
gaps.
A
scenario
sensitivity
analysis
shows
importance
adsorbent
regeneration
reuse.
cost
using
reusable
porous
metal
oxide
in
range
$
200/Kg
P
reducing
ultra-low
concentrations.
Future
needs
focus
capacity
at
low
concentrations,
reuse
both
liquid.
Environmental Science & Technology,
Journal Year:
2018,
Volume and Issue:
52(21), P. 12010 - 12025
Published: Oct. 2, 2018
Nanoscale
zerovalent
iron
(NZVI)
is
one
of
the
most
extensively
studied
nanomaterials
in
fields
wastewater
treatment
and
remediation
soil
groundwater.
However,
rapid
oxidative
transformations
NZVI
can
result
reduced
reactivity.
Indeed,
surface
passivation
considered
challenging
aspects
successfully
applying
to
contaminant
degradation.
The
oxidation
lead
formation
FeII-bearing
phases
(e.g.,
FeIIO,
FeII(OH)2,
FeIIFeIII2O4)
on
or
complete
ferric
(oxyhydr)oxides
FeIIIOOH).
This
corrosion
phenomenon
dependent
upon
various
factors
including
composition
itself,
type
concentration
aqueous
species,
reaction
time
oxic/anoxic
environments.
As
such,
coexistence
different
Fe
states
surfaces
may
also,
some
instances,
provide
a
unique
reactive
microenvironment
promote
adsorption
contaminants
their
subsequent
transformation
via
redox
reactions.
Thus,
an
understanding
chemistry,
its
related
mechanisms,
essential
not
only
for
effective
application
but
also
accurately
assessing
positive
negative
effects
passivation.
aim
this
review
discuss
nature
processes
that
occur
byproducts
form
In
particular,
presents:
(i)
strengths
limitations
state-of-the-art
techniques
electron
microscopies
X-ray-based
spectroscopies)
identify
byproducts;
(ii)
mechanisms
proposed
anoxic
oxic
environments;
(iii)
arising
from
synthesis
procedures
presence
inorganics/organics
form.
addition,
several
depassivation
strategies
assist
increasing
and/or
maintaining
reactivity
are
considered,
thereby
enhancing
effectiveness
