Environmental Technology,
Journal Year:
2023,
Volume and Issue:
45(25), P. 5233 - 5243
Published: Nov. 21, 2023
The
study
proposed
a
method
for
determining
total
nitrogen
(TN)
content
in
activated
sludge
by
ultrasound
pre-treatment
assisted
wet
method.
Based
on
the
single-factor
experiment,
with
TN
as
response
value,
surface
methodology
was
employed
to
examine
individual
and
interactive
effects
of
three
factors:
dilution
multiple
mixture,
ultrasonic
time,
power.
At
same
physico-chemical
parameters
digestion-oxidation
were
optimised.
results
indicated
that
optimal
follows;
225
times,
stirring
rate
400
r/min,
time
22
minutes,
power
720
W,
added
volume
potassium
persulfate
at
8
mL
digestion
40
minutes.
relative
standard
deviation
(RSD)
parallel
determination
samples
using
≤2.77%,
spike
recovery
98.49-101.43%.
method,
determine
concentration
sludge,
simpler
operate,
more
accurate.
Sustainable Horizons,
Journal Year:
2024,
Volume and Issue:
10, P. 100084 - 100084
Published: Jan. 10, 2024
Heavy
metal
pollution
leads
to
severe
soil
contamination
and
raises
environmental
concerns.
Phosphorus-bearing
minerals
have
been
identified
as
effective
environmentally
friendly
agents
for
remediating
contaminated
soil.
However,
using
recycled
phosphorus
remediation
remains
limited.
In
this
study,
we
investigated
the
potential
use
of
recovered
magnesium
ammonium
phosphate
(MAP),
potassium
hydrate
(KMP),
hydroxyapatite
(HAP)
immobilize
lead
(Pb)
cadmium
(Cd)
in
The
effectiveness
MAP,
KMP,
HAP
modifying
chemical
composition
Pb
Cd
reducing
their
mobility
was
demonstrated
by
results.
When
added
at
dosages
5:1
10:1,
extractable
fraction
decreased
0.43–13.43
%
control
group.
Similarly,
49.18–76.44
group
same
dosages.
Moreover,
application
these
products
resulted
an
increase
pH
value,
urease
activity,
bacterial
Shannon
index,
thereby
enhancing
properties.
immobilization
effects
were
more
significant
Pb-contaminated
compared
Cd-contaminated
soil,
MAP
KMP
exhibited
a
stronger
passivation
effect
on
comparison
HAP.
For
fertility
improvement,
molar
ratio
10:1
recommended,
whereas
effectively
passivated
These
findings
provide
evidence
feasibility
utilizing
heavy
metals
polluted
The Canadian Journal of Chemical Engineering,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 27, 2025
Abstractas
The
agricultural
sector
is
experiencing
a
surge
in
waste
generation
due
to
population
growth,
creating
an
urgent
need
convert
byproducts
into
value‐added
products.
Maize
(
Zea
mays
L.),
leading
global
crop,
produces
significant
byproducts,
such
as
corn
cob,
which
are
often
undervalued.
Biomass,
including
promising
carbon‐neutral
energy
source.
While
combustion
commonly
used,
pyrolysis
gaining
traction
its
ability
generate
solid
(biochar),
liquid
(bio‐oil),
and
gaseous
products,
each
with
various
applications.
This
study
presents
systematic
literature
review
on
the
of
utilizing
three
databases:
Scopus,
Web
Science,
Springer.
search
resulted
portfolio
composed
409
research
papers.
Normalized
Index
for
Ranking
Papers
(NIRP)
method
was
employed
rank
selected
papers,
followed
by
bibliometric
analyses.
identifies
key
trends,
publication
dynamics,
influential
works
field.
It
highlights
China's
role
output
citation
impact
provides
insights
evolution
topics
methodologies.
emphasizes
significance
biomass
viable
alternative
fossil
fuels,
commercial
adsorbents,
catalyst
supports,
fertilizers,
providing
both
economic
environmental
benefits.
By
examining
current
state
research,
this
work
seeks
inform
future
studies
promote
advancement
efficient
eco‐friendly
conversion
technologies.
findings
aim
encourage
further
exploration
pyrolysis,
highlighting
potential
contribute
sustainable
resource
management
reduce
reliance
non‐renewable
resources.
ACS Sustainable Chemistry & Engineering,
Journal Year:
2024,
Volume and Issue:
12(47), P. 17319 - 17327
Published: Nov. 13, 2024
Biochar
offers
a
potential
sustainable
pathway
for
recovering
phosphorus
from
wastewater
to
agriculture.
Magnesium-modified
biochar
has
demonstrated
an
enhanced
phosphate
adsorption
capacity
and
excellent
bioavailability.
This
study
aims
identify
the
life
cycle
environmental
hotspots
in
recovery
using
magnesium-modified
biochars
derived
bamboo,
corn,
wood
compared
them
with
common
fertilizers.
The
results
show
that
biomass
supply
stage
modification
are
main
most
impact
categories.
As
load
of
decreases,
could
become
hotspot.
Although
phosphate-loaded
base
case
do
not
have
better
overall
performance
than
fertilizers
(especially
those
without
nitrogen),
they
significantly
lower
mineral
resource
scarcity
ecotoxicity.
sensitivity
analysis
suggests
sensitive
background
inventory
selected.
indicates
yield,
biochars,
source
chemical,
feedstock
key
areas
technological
improvement.
In
future,
comprehensive
field
application
diverse
set
needed
assess
this
sorption-based
pathway.
