IntechOpen eBooks,
Год журнала:
2023,
Номер
unknown
Опубликована: Март 22, 2023
Arsenic,
either
in
(III)
or
(V)
oxidation
states
forms,
is
a
hazardous
element
to
humans;
thus,
its
removal
from
aqueous
environments
of
the
utmost
priority
countries
where
this
problem
arises.
From
various
separation
technologies,
arsenic
via
biosorption
processing
attracted
an
interest,
because
besides
element,
allows
recycle
materials
that
many
cases
are
considered
as
wastes.
The
present
chapter
reviewed
most
recent
proposals
(2022
year)
about
using
biosorbents
remove
toxic
element.
Applied Water Science,
Год журнала:
2022,
Номер
13(1)
Опубликована: Ноя. 27, 2022
Abstract
The
contamination
of
environmental
waters
with
heavy
metals
and
radionuclides
is
increasing
because
rapid
industrial
population
growth.
removal
these
contaminants
from
water
via
adsorption
onto
metal
nanoparticles
an
efficient
promising
technique
to
abate
the
toxic
effects
associated
pollutants.
Among
nanoparticle
adsorbents,
zinc
oxide
(ZnONPs)
have
received
tremendous
attention
owing
their
biocompatibility,
affordability,
long-term
stability,
surface
characteristics,
nontoxicity,
powerful
antibacterial
activity
against
microbes
found
in
water.
In
this
review,
we
considered
ZnONPs.
We
examined
isotherm,
kinetic,
thermodynamic
modeling
process
as
well
mechanism
provide
significant
insights
into
interactions
between
pollutants
nanoparticles.
ZnONPs
areas
(3.93
58.0
m
2
/g)
synthesized
by
different
methods
exhibited
capacities
(0.30
1500
mg/g)
for
Langmuir
Freundlich
isotherms
were
most
suitable
process.
separation
factor
indicated
favorable
all
on
pseudo-second-order
kinetics
presented
best
adsorbates
regression
values
range
0.986–1.000.
Spontaneous
was
obtained
studies
involving
endothermic
exothermic
processes.
complexation,
precipitation,
ion
exchange,
electrostatic
are
probable
mechanisms
a
predominance
complexation.
desorption
process,
reusability
direction
future
investigations
also
presented.
Total Environment Research Themes,
Год журнала:
2023,
Номер
6, С. 100029 - 100029
Опубликована: Фев. 11, 2023
Cassava
production
and
consumption
in
its
raw
or
processed
form
have
experienced
a
rise
recent
times
globally,
with
Nigeria
being
the
major
producer
of
cassava
world.
However,
increased
this
crop
has
resulted
an
increase
peels,
which
if
not
properly
disposed
recycled,
would
burden
environment.
Previous
studies
only
been
able
to
engage
electrically-powered
reactors
for
thermochemical
conversion
these
is
challenge
as
cannot
be
used
regions
insufficient
supply
electricity.
In
study,
authors
utilized
top-lit
updraft
reactor
retort
heating
waste
peels
into
biochar.
The
reactor,
relatively
cheap,
simple
use,
environmentally
friendly
modified
biochar
production,
biomass-powered.
carbonization
process,
lasted
160
minutes,
obtained
peak
temperature
338
℃,
gave
yield
55.13%.
FTIR
analysis
revealed
that
peel
consists
similar
functional
groups
relation
precursor,
but
more
oxygenated
groups.
BET
surface
area
BJH
pore
diameter
were
319.784
m2/g
2.447
nm,
respectively.
EDX
showed
majorly
made
up
carbon
(56.93%)
silver
(22.97%).
SEM
micrographs
rough
porous
surface.
DTA/TGA
results
process
improved
thermal
efficiency
material.
Biotechnology Reports,
Год журнала:
2023,
Номер
39, С. e00805 - e00805
Опубликована: Июнь 16, 2023
Sugarcane
bagasse
is
an
abundant
and
renewable
agricultural
waste
material
generated
by
the
sugar
industry
worldwide.
The
use
of
sugarcane
as
a
bio-coagulant
precursor
in
water
treatment
eco-friendly
cost-effective
approach
that
has
shown
great
potential.
This
article
reviewed
prospects
challenges
utilizing
for
treatment.
past
studies
explored
properties
chemical
composition
bioactive
compounds
can
be
extracted
from
it,
well
their
potential
coagulation
performance
It
was
observed
there
are
few
have
been
published
on
subject.
effectiveness
bagasse-based
coagulants
varies
depending
several
factors,
such
pH,
temperature,
quality
parameters.
However,
lack
standardization
production
challenge
needs
to
addressed.
Additionally,
optimization
extraction
processing
methods
enhance
investigated
further.
In
conclusion,
holds
promise
future
sustainable
used
highlights
importance
exploring
alternative
materials
