Environmental Science & Technology,
Год журнала:
2021,
Номер
55(14), С. 9691 - 9710
Опубликована: Июнь 30, 2021
Excessive
emissions
of
gaseous
pollutants
such
as
SO2,
NOx,
heavy
metals
(Hg,
As,
etc.),
H2S,
VOCs,
etc.
have
triggered
a
series
environmental
pollution
incidents.
Sulfate
radical
(SO4•–)-based
advanced
oxidation
technologies
(AOTs)
are
one
the
most
promising
removal
because
they
can
not
only
produce
active
free
radicals
with
strong
ability
to
simultaneously
degrade
pollutants,
but
also
their
reaction
processes
environmentally
friendly.
However,
so
far,
special
review
focusing
on
using
SO4•–-based
AOTs
is
reported.
This
reports
latest
advances
in
(e.g.,
Hg,
and
VOCs)
AOTs.
The
performance,
mechanism,
species
identification
advantages/disadvantages
these
reviewed.
existing
challenges
further
research
suggestions
commented.
Results
show
that
possess
good
development
potential
pollutant
control
field
due
simple
reagent
transportation
storage,
low
product
post-treatment
requirements
degradation
refractory
pollutants.
Each
AOT
possesses
its
own
advantages
disadvantages
terms
cost,
reliability,
post-treatment.
Low
yield,
poor
capacity,
unclear
mechanism/contribution
species,
unreliable
technology
high
cost
still
main
problems
this
field.
combined
use
multiactivation
strategies
overcome
defects
since
it
may
make
up
for
shortcomings
independent
technology.
In
order
improve
yield
enhancement
mass
transfer
optimization
design
reactor
critical
issues.
Comprehensive
consideration
catalytic
materials,
chemistry,
route
solve
problems.
clarify
essential
select
suitable
sacrificial
agents,
probes
spin
trapping
which
selectivity
target
specie,
solubility
water,
little
effect
activity
catalyst
itself
transfer/diffusion
parameters.
reduce
investment
operating
costs,
necessary
carry
out
related
studies
simultaneous
more
ACS Catalysis,
Год журнала:
2020,
Номер
10(24), С. 14857 - 14870
Опубликована: Дек. 3, 2020
Manganese
oxides
and
carbon
materials
are
both
desirable
catalysts
for
persulfate
(PS)
advanced
oxidation
processes
in
environmental
remediation.
Nevertheless,
manganese
suffer
from
low
reusability
while
face
the
problem
of
limited
catalytic
efficiency.
For
purpose
making
full
use
advantages
two
as
well
avoiding
their
shortcomings,
carbon-coated
Mn3O4
composites
(Mn3O4/C)
with
a
regular
nanocube
structure
were
designed
to
activate
PS
removal
organics,
deeply
investigated.
The
catalyst
prepared
at
400
°C
precursor
ratio
(glucose/KMnO4)
0.5
exhibited
best
performance
along
satisfactory
owing
protection
outer
layer.
According
experimental
results
density
functional
theory
calculation,
there
van
der
Waals
interaction
part
strong
attraction
between
interface
Mn3O4/C,
which
could
be
enhanced
by
inner
thus
promoted
electron
transfer
shell,
defective
edges
layer
hydroxyl
(C–OH)
groups
act
active
sites
activation.
Radical
(SO4•–,
•OH)
nonradical
(1O2)
participated
degradation
2,4-dichlorophenol,
•OH
was
dominating.
This
study
not
only
proposed
promising
pollutants
but
also
expanded
research
ideas
future
activation
mechanism
studies
integrating
experiment
simulation.
ACS ES&T Engineering,
Год журнала:
2022,
Номер
2(4), С. 527 - 546
Опубликована: Март 8, 2022
Heterogeneous
photocatalytic
persulfate
(PS)
activation
technologies
are
being
intensively
studied
for
water
treatment
due
to
their
friendly
environmental
benefits
and
photosynergistic
effect
in
comparison
with
traditional
PS
systems.
Previous
reviews
have
summarized
diverse
methods
the
role
of
light
systems,
but
it
is
still
urgent
provide
a
comprehensive
review
on
deep
understanding
rational
design
heterogeneous
PS-based
advanced
oxidation
processes
(AOPs).
This
intends
thoroughly
address
in-depth
fundamentals
mechanisms
PS-AOPs.
Challenges
improvement
strategies
PS-AOPs
also
critically
discussed.
On
basis
detailed
survey
published
studies,
PS-AOPs,
including
Fe-based,
TiO2-based,
other
metal
based,
bimetallic,
metal-free
carefully
clarified.
Finally,
engineering
implications
prospects
enumerated
developing
efficient
environmentally
treatment.
It
expected
that
this
will
motivate
researchers
construct
novel
promising
Metal-organic
frameworks
(MOFs)
have
potential
applications
in
removing
pollutants
such
as
heavy
metals,
oils,
and
toxins
from
water.
However,
due
to
the
intrinsic
fragility
of
MOFs
their
fine
powder
form,
there
are
still
technical
barriers
practical
application
blockage
pipes,
difficulty
recovery,
environmental
toxicity.
Therefore,
attention
has
focused
on
approaches
convert
nanocrystalline
into
macroscopic
materials
overcome
these
limitations.
Recently,
strategies
for
shaping
beads
(0D),
nanofibers
(1D),
membranes
(2D),
gels/sponges
(3D)
with
macrostructures
developed
including
direct
mixing,
situ
growth,
or
deposition
polymers,
cotton,
foams
other
porous
substrates.
In
this
review,
successful
fabrication
water
adsorption,
separation,
advanced
oxidation
processes,
discussed.
The
relationship
between
performance
microstructure
materials,
how
range
0D
3D
can
be
used
treatment
also
outlined.
