South African Journal of Chemical Engineering,
Journal Year:
2022,
Volume and Issue:
41, P. 129 - 139
Published: June 9, 2022
Textile
wastewater
discharging
to
the
surface
water
body
is
a
great
concern
because
it
contains
different
pollutants
such
as
dyes,
organics,
surfactants,
inorganic
salt
and
heavy
metals.
An
effective
low-cost
treatment
technology
has
not
been
developed
yet.
The
objective
of
this
study
was
develop
biochar
adsorbent
from
novel
Citrus
macroptera
peels
(CMPs)
using
conventional
slow
pyrolysis
process
applied
for
methylene
blue
dye
in
an
aqueous
solution.
chemical
functionalities,
textures,
crystallinity
synthesized
were
characterized
by
Fourier
Transform-Infrared
(FTIR)
spectroscopy,
Field
Emission
Scanning
Electron
Microscope
(FESEM)
analysis,
X-ray
powder
Diffraction
(XRD),
respectively.
Different
functional
groups
-COOH,
OH,
R-OH,
randomized
porous
structures
with
tunnel-like
cracks
confirmed
FTIR
FESEM,
Typical
non-linear
disordered
3D
carbon
structure
predicted
XRD.
Response
methodology
(RSM)
performed
central
composite
design
(CCD)
technique,
analytical
tuning
variables,
e.g.,
pH,
contact
time,
concentration,
also
carried
out
validate
RSM
optimization.
adsorption
isotherms
kinetics
investigated,
where
isotherm
followed
Langmuir
pseudo
2nd
order
models.
results
at
pH
8
showed
85%
removal
within
75
min
time.
According
model,
maximum
capacity,
qm
139.7
mg/g,
which
aligned
experimental
value.
present
work
shows
that
CMPs-derived
potential
industrial
effluents.
npj Clean Water,
Journal Year:
2022,
Volume and Issue:
5(1)
Published: July 11, 2022
Abstract
The
chemical
regeneration
process
has
been
extensively
applied
to
reactivate
biochar,
supporting
its
reusability
and
leading
significant
operating
cost
reduction.
However,
no
recent
review
discusses
the
effectiveness
of
biochar
regeneration.
Thus,
this
article
comprehensively
reviews
contaminated
with
organic
inorganic
pollutants.
Performance
depends
on
adsorption
mechanism,
functional
groups,
adsorbent
pore
structure,
changes
in
active
sites.
Secondary
contamination
is
one
challenges
facing
sustainable
adaptation
industry.
paper
these
draws
a
roadmap
for
future
research
support
wastewater
treatment
by
biochar.
Carbon Research,
Journal Year:
2022,
Volume and Issue:
1(1)
Published: June 18, 2022
Abstract
Contamination
of
aquatic
and
soil
systems
by
organic
inorganic
pollutants
has
become
a
serious
issue
concern
worldwide.
Viable
cost-effective
solutions
are
urgently
needed
to
mitigate
the
negative
impacts
diverse
on
environment
human
health.
Biochar
emerged
as
an
effective
green
material
for
remediation
wide
spectrum
(in)organic
pollutants.
However,
applications
pristine
biochar
in
decontamination
have
encountered
bottlenecks
due
its
limited
properties
which
cannot
meet
desired
requirements.
Therefore,
multiple
modification
methods
been
developed
tailoring
physicochemical
enhance
effectiveness
environmental
decontamination.
This
work
provides
holistic
review
recent
advances
synthesis
engineered
using
physical,
chemical,
biological
methods.
Further
related
mechanisms
field
also
summarized
discussed.
In
addition,
existing
challenges
research
gaps
outlined,
future
needs
proposed.
summarizes
scientific
opportunities
comprehensive
understanding
biochars
materials
contaminated
water
soil.
Graphical
abstract
Environmental Chemistry Letters,
Journal Year:
2023,
Volume and Issue:
21(4), P. 2337 - 2398
Published: May 4, 2023
Access
to
drinkable
water
is
becoming
more
and
challenging
due
worldwide
pollution
the
cost
of
treatments.
Water
wastewater
treatment
by
adsorption
on
solid
materials
usually
cheap
effective
in
removing
contaminants,
yet
classical
adsorbents
are
not
sustainable
because
they
derived
from
fossil
fuels,
can
induce
secondary
pollution.
Therefore,
biological
sorbents
made
modern
biomass
increasingly
studied
as
promising
alternatives.
Indeed,
such
biosorbents
utilize
waste
that
would
otherwise
pollute
systems,
promote
circular
economy.
Here
we
review
biosorbents,
magnetic
sorbents,
other
cost-effective
with
emphasis
preparation
methods,
types,
mechanisms,
regeneration
spent
adsorbents.
Biosorbents
prepared
a
wide
range
materials,
including
wood,
bacteria,
algae,
herbaceous
agricultural
waste,
animal
waste.
Commonly
removed
contaminants
comprise
dyes,
heavy
metals,
radionuclides,
pharmaceuticals,
personal
care
products.
Preparation
methods
include
coprecipitation,
thermal
decomposition,
microwave
irradiation,
chemical
reduction,
micro-emulsion,
arc
discharge.
Adsorbents
be
classified
into
activated
carbon,
biochar,
lignocellulosic
clays,
zeolites,
peat,
humic
soils.
We
detail
isotherms
kinetics.
Regeneration
supercritical
fluid
desorption.
also
discuss
exhausted
adsorbent
management
disposal.
found
agro-waste
remove
up
68–100%
while
wooden,
herbaceous,
bacterial,
marine-based
55–99%
metals.
Animal
waste-based
1–99%
The
average
removal
efficiency
modified
around
90–95%,
but
some
treatments,
cross-linked
beads,
may
negatively
affect
their
efficiency.
Cleaner Materials,
Journal Year:
2022,
Volume and Issue:
6, P. 100137 - 100137
Published: Aug. 30, 2022
Biochar
is
a
carbon-rich
product
obtained
from
the
thermochemical
conversion
of
biomass.
Utilizing
biochar
essential
for
enhancing
economic
viability
and
maintaining
ecology
effectively.
This
work
reviews
techniques
producing
various
lignocellulosic
biomass
sources.
Pyrolysis
technology
converting
into
has
emerged
as
frontier
research
domain
pollutants
removal.
The
effects
feedstock
parameters,
production
techniques,
reaction
conditions
(temperature,
heating
rate,
etc.),
activation,
functional
group
modification
are
compared
on
biochar's
physical
chemical
properties.
review
also
focused
environmental
applications
in
several
domains,
such
agriculture
wastewater
treatment.
Considering
extensive
availability
feedstock,
excellent
physical/chemical
surface
properties,
inexpensive
cost,
remarkable
potential
removing
water
efficiently.
Studying
evolution
properties
by
in-situ
or
post-modification
great
significance
improving
utilization
value
valuable
resource,
yet
its
application
necessitates
additional
structure,
well
development
to
modify
those
factors.
