Environmental Science & Technology,
Journal Year:
2021,
Volume and Issue:
55(13), P. 8464 - 8483
Published: June 25, 2021
2021
marks
10
years
since
controlled
abiotic
synthesis
of
sulfidated
nanoscale
zerovalent
iron
(S-nZVI)
for
use
in
site
remediation
and
water
treatment
emerged
as
an
area
active
research.
It
was
then
expanded
to
microscale
ZVI
(S-mZVI)
together
with
S-nZVI,
they
are
collectively
referred
S-(n)ZVI.
Heightened
interest
S-(n)ZVI
stemmed
from
its
significantly
higher
reactivity
chlorinated
solvents
heavy
metals.
The
extremely
promising
research
outcomes
during
the
initial
period
(2011-2017)
led
renewed
(n)ZVI-based
technologies
treatment,
explosion
new
last
four
(2018-2021)
that
is
building
understanding
novel
complex
role
sulfides
enhancing
(n)ZVI.
Numerous
studies
have
focused
on
exploring
different
approaches,
colloidal,
surface,
(electrochemistry,
contaminant
selectivity,
corrosion)
properties.
This
review
provides
a
critical
overview
recent
milestones
technology
development:
(i)
clear
insights
into
transformation
long-term
aging,
(ii)
impact
sulfidation
methods
particle
characteristics
reactivity,
(iii)
broader
range
treatable
contaminants,
(iv)
complete
decontamination,
(v)
ecotoxicity,
(vi)
field
implementation.
In
addition,
this
discusses
major
knowledge
gaps
future
avenues
opportunities.
Carbon Research,
Journal Year:
2022,
Volume and Issue:
1(1)
Published: June 18, 2022
Abstract
With
social
progress
and
industrial
development,
heavy
metal
pollution
in
water
soils
environment
is
becoming
more
serious.
Although
biochar
a
low-cost
environmentally
friendly
adsorbent
for
ions,
its
adsorption
immobilization
efficiency
still
need
to
be
improved.
As
an
upgraded
version
of
biochar,
modified
has
attracted
extensive
attention
the
scientific
community.
This
review
summarized
recent
research
on
treatment
methods
pollutants
using
biochar.
The
features
advantages
modification
techniques
such
as
physical
modification,
chemical
biological
other
categories
were
discussed.
mechanism
removing
metals
from
soil
by
was
summarized.
It
found
that
had
better
performance
after
which
provided
higher
surface
areas
functional
groups,
enough
binding
sites
combine
ions.
Biochar
very
promising
candidate
environment.
Furthermore,
some
high
valent
ions
could
reduced
low
metals,
Cr(VI)
reduction
Cr(III),
form
precipitates
in-situ
sorption-reduction-precipitation
strategy.
However,
it
direction
efforts
develop
high-efficiency
with
low-cost,
sorption
capacity,
photocatalytic
performance,
no
secondary
future.
Water,
Journal Year:
2021,
Volume and Issue:
13(2), P. 215 - 215
Published: Jan. 18, 2021
Wastewater
generation
and
treatment
is
an
ever-increasing
concern
in
the
current
century
due
to
increased
urbanization
industrialization.
To
tackle
situation
of
increasing
environmental
hazards,
numerous
wastewater
approaches
are
used—i.e.,
physical,
chemical,
biological
(primary
tertiary
treatment)
methods.
Various
techniques
being
used
have
risks
producing
secondary
pollutants.
The
most
promising
technique
use
different
materials
as
adsorbents
that
a
higher
efficacy
treating
wastewater,
with
minimal
production
Biosorption
key
process
highly
efficient
cost-effective.
This
method
majorly
uses
adsorption
process/mechanism
for
toxicant
removal
from
wastewater.
review
elaborates
major
agricultural
non-agricultural
materials-based
sorbents
been
their
possible
mechanisms
pollutant
removal.
Moreover,
this
creates
better
understanding
how
these
can
be
enhanced
by
modification
or
treatments
other
substances.
also
explains
re-usability
and/or
disposal
safe
environmentally
friendly
way,
along
highlighting
research
gaps
potential
future
directions.
Additionally,
cost
benefit
ratio
elucidated.
