Chemical Engineering Journal,
Journal Year:
2021,
Volume and Issue:
431, P. 134238 - 134238
Published: Dec. 20, 2021
Mass
transfer
and
oxidant
utilization
are
perhaps
two
of
the
most
critical
issues
in
sulfate
radical
(SO4•−)
based
advanced
oxidation
technologies
(AOTs)
their
scaled-up
implementation.
In
this
study,
we
propose
using
hydrodynamic
cavitation
(HC),
considered
a
green,
effective
method,
to
promote
both
mass
zero-valent
iron
(Fe0)
activated
persulfate
(PS)
system.
Whilst
BET
surface
area
Fe0
was
increased
by
8
times
after
HC
treatment,
concentration
Fe2+
derived
from
is
greatly
for
PS
activation.
The
reappearance
ensured
good
reusability
catalyst.
Likewise,
impact
pH
revealed
that
TC
adsorption
on
catalyst
at
acidic
favored
its
degradation
compared
with
higher
pH.
With
respect
utilization,
it
observed
even
high
dosage
(2.8
mM)
completed
converted
within
30
min
HC-Fe0/PS
According
SEM,
TEM,
analysis,
conclude
microjets
induced
bubbles
or
direct
abrasion
agitation
have
contributed
removal
hydroxide/oxide
layers
surface,
thus
reactivating
catalytic
activity.
Given
these
reasons,
up
97.80%
Tetracycline
(TC),
model
pollutant,
synergistic
coefficient
as
2.62.
After
confirming
SO4•−
dominant
reactive
species,
five
pathways
were
proposed
given
intermediate
evidence
LC-MS/MS
analysis
density
functional
theory
(DFT)
calculations.
Results
study
could
provide
new
insights
into
role
activation
shed
light
potential
implementation
SO4•−-based
AOTs
wastewater
treatments.
Soil Use and Management,
Journal Year:
2021,
Volume and Issue:
38(1), P. 14 - 38
Published: May 31, 2021
Abstract
Engineered
biochars
are
promising
candidates
in
a
wide
range
of
environmental
applications,
including
soil
fertility
improvement,
contaminant
immobilization,
wastewater
treatment
and
situ
carbon
sequestration.
This
review
provides
systematic
classification
these
novel
biochar
composites
identifies
the
future
trends
composite
research
application.
It
is
proposed
that
metals,
minerals,
layered
double
hydroxides,
carbonaceous
nanomaterials
microorganisms
enhance
performances
via
distinct
mechanisms.
In
this
review,
four
identified
assessed
critically.
Firstly,
facile
synthesis
methods,
particular
ball
milling
co‐pyrolysis,
have
emerged
as
popular
fabrication
strategies
suitable
for
large‐scale
applications.
Secondly,
modification
with
green
materials,
such
natural
clay
minerals
microorganisms,
align
well
on‐going
sustainable
remediation
(GSR)
movement.
Furthermore,
new
applications
health
improvement
climate
change
mitigation
support
realization
United
Nation's
Sustainable
Development
Goals
(SDGs).
Finally,
importance
field
studies
getting
more
attention,
since
evidence
success
critically
needed
before