Reviews in Environmental Science and Bio/Technology,
Год журнала:
2024,
Номер
23(3), С. 699 - 737
Опубликована: Авг. 21, 2024
Abstract
Biogas
contains
significant
quantities
of
undesirable
and
toxic
compounds,
such
as
hydrogen
sulfide
(H
2
S),
posing
severe
concerns
when
used
in
energy
production-related
applications.
Therefore,
biogas
needs
to
be
upgraded
by
removing
H
S
increase
their
bioenergy
application
attractiveness
lower
negative
environmental
impacts.
Commercially
available
upgradation
processes
can
expensive
for
small
medium-scale
production
plants,
wastewater
treatment
facilities
via
anaerobic
digestion
process.
In
addition,
an
all-inclusive
review
detailing
a
comparison
biochar
hydrochar
removal
is
currently
unavailable.
the
current
study
aimed
critically
systematically
biochar/hydrochar
from
biogas.
To
achieve
this,
first
part
discussed
technologies
properties
vs.
hydrochar.
exisiting
adsorption
mechanisms,
namely
physical
adsorption,
reactive
chemisorption,
responsible
with
char
materials
were
discussed.
Also,
factors,
including
feedstock
type,
activation
strategies,
reaction
temperature,
moisture
content,
other
process
parameters
that
could
influence
behaviour
are
summarised.
Finally,
synergy
trade-offs
between
sectors
techno-economic
feasibility
using
presented.
Biochar’s
excellent
structural
coupled
alkaline
pH
high
metal
facilitate
physisorption
chemisorption
pathways
removal.
case
hydrochar,
occurs
mainly
which
attributed
well-preserved
surface
functional
groups.
Challenges
commercial
adsorbents
stream
highlighted
perspectives
future
research
provided.
Graphical
abstract
Agronomy,
Год журнала:
2025,
Номер
15(4), С. 778 - 778
Опубликована: Март 22, 2025
The
accumulation
of
copper
(Cu)
and
zinc
(Zn)
from
piglet
feed,
coupled
with
inadequate
compost
maturation,
hinders
the
safe
land
application
pig
manure
(PM).
This
study
employed
self-organizing
maps
(SOMs)
integrated
three-dimensional
excitation–emission
matrix
fluorescence
spectroscopy
(3D-EEM)
parallel
factor
analysis
(PARAFAC)
to
evaluate
PM
maturity
Cu/Zn
passivation
under
different
biochar
(BC)
dosages
(0%,
8%,
10%,
12%).
results
revealed
that
SOM
clustering
effectively
distinguished
composting
phases
organic
matter
transformation
trends,
while
network
identified
key
microbial
modules
(M5,
M6)
linked
passivation.
Moreover,
12%
BC
accelerated
maximizing
humic
content
(C1:
anthropogenic;
C4:
terrestrial)
by
increasing
Luteimonas
abundance
(241.98%)
reducing
Terrisporobacter
(92%).
It
also
achieved
highest
Cu
(36.36%)
Zn
(32.34%)
Although
10%
promoted
C4
synthesis
but
inhibited
C1
formation,
it
ultimately
reached
a
similar
level
BC.
Additionally,
demonstrated
comparable
(34.85%)
(27.89%)
passivation,
making
more
cost-effective
alternative.
These
findings
highlight
as
robust
tool
for
evaluation,
optimizing
improving
efficiency.
Chemical Engineering & Technology,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 15, 2025
Abstract
In
this
study,
naproxen
(NPX),
one
of
the
emerging
contaminants
was
removed
by
green
synthesizing
Fe
3
O
4
coated
magnetic
biochar
nanocomposites
(
Ct
‐BMNCs)
synthesized
from
Crataegus
tanacetifolia
Lam.
)
wastes.
The
characteristics
‐BMNCs
examined
x‐ray
diffraction
(XRD),
scanning
electron
microscopy
(SEM),
energy
dispersive
(EDX),
Fourier
transform
infrared
spectroscopy
(FTIR),
thermogravimetry‐differential
thermal
analysis
(TGA‐DTA),
dynamic
light
scattering
(DLS),
zetasizer,
Brunauer‐Emmett‐Teller
(BET)
UV–Vis
spectroscopy,
and
pH
point
zero
charge
(pH
pzc
).
With
batch
adsorption
tests,
effects
(4–11),
amount
adsorbent
(2.5–80
g
L
−1
),
time,
initial
concentration
(3.125–200
mg
thermodynamic
performed.
Also,
kinetic
isotherm
models
error
functions
were
used.
Accordingly,
average
surface
5.68
+11.7
mV,
respectively.
Moreover,
reaction
exothermic,
most
suitable
Pseudo‐second‐order
Freundlich
R
2
:0.999).
q
max
30.12
mgNPX/g
‐BMNCs.
Ct‐BMNCs
are
quite
effective
in
removing
NPX.
