Journal of Materials Research and Technology,
Год журнала:
2023,
Номер
27, С. 6900 - 6911
Опубликована: Ноя. 1, 2023
The
decrease
in
the
total
iron
grade
of
pellets
due
to
bentonite
has
prompted
search
for
a
non-polluting
and
alternative
binder.
while
organic
binders
are
considered
potential
substitutes
bentonite,
they
cannot
fully
replace
it
complete
decomposition
failure
during
pellet
hardening.
Thus,
production
utilizing
composite
binder
gained
significant
attention
academia
industry.
In
this
study,
novel
polymer-type
(PTB)
was
introduced
minimize
consumption
green
preparation.
By
regulating
ratio,
addition
just
0.01
%
PTB
can
reduce
usage
by
1.0
under
optimal
conditions,
all
maintaining
excellent
quality.
Further
investigations
revealed
that
molecules
adsorbed
on
surfaces
concentrate
(predominantly
magnetite)
through
hydrogen
bonding,
electrostatic
repulsion,
coordination,
monodentate
chelation
surface
complexation,
dissolved
into
fibrous
structure
bridge
particles
together.
Moreover,
abundant
hydrophilic
groups
(-OH,
–COOH)
substantially
enhanced
water-holding
capacity
pellets,
resulting
reduced
rate
drying
dehydration
an
elevated
shock
temperature.
This
comprehensive
study
provides
valuable
scientific
insights
development
application
binders.
Environmental Technology & Innovation,
Год журнала:
2024,
Номер
34, С. 103560 - 103560
Опубликована: Фев. 1, 2024
Amorphous
nanometer
alumina
(nano-Al2O3)
was
prepared
by
inverse
microemulsion
method
in
the
presence
of
aluminum
sulfate
octadecahydrate
as
source,
poly(ethylene
glycol)
octyl-phenyl
ether
and
cetyl
trimethyl
ammonium
bromide
emulsifiers,
n-butanol
co-surfactant.
The
optimal
condition
for
preparing
nano-Al2O3
investigated
relation
to
effect
stirring
rate
on
morphology
adsorption
performance
product;
capacity
mechanism
AsO43-
ion
aqueous
solution
were
explored
based
simulations
with
conventional
isothermal
models.
Findings
indicate
that
absence
emulsifiers
co-surfactant
exhibits
a
high
149.76
mg·g-1
towards
ion,
higher
than
reported
literature.
is
dependent
pH
value
temperature
well
coexisting
ions;
maximum
occurs
at
6.
Moreover,
obeys
Langmuir
model
pseudo-second-order
kinetic
equation,
referring
monolayer
chemical
adsorption.
process
governed
both
membrane
diffusion
internal
diffusion;
dominated
diffusion.
In
summary,
has
strong
stability
could
be
promising
nano-adsorbent
removing
heavy
metal
like
therefrom.
Molecules,
Год журнала:
2023,
Номер
28(5), С. 2292 - 2292
Опубликована: Март 1, 2023
Cadmium
(Cd)
and
lead
(Pb)
are
global
environmental
pollutants.
In
this
study,
Nostoc
sp.
MK-11
was
used
as
an
environmentally
safe,
economical,
efficient
biosorbent
for
the
removal
of
Cd
Pb
ions
from
synthetic
aqueous
solutions.
identified
on
a
morphological
molecular
basis
using
light
microscopic,
16S
rRNA
sequences
phylogenetic
analysis.
Batch
experiments
were
performed
to
determine
most
significant
factors
solutions
dry
MK1
biomass.
The
results
indicated
that
maximum
biosorption
found
under
conditions
1
g
biomass,
100
mg/L
initial
metal
concentrations,
60
min
contact
time
at
pH
4
5
Cd,
respectively.
Dry
biomass
samples
before
after
characterized
FTIR
SEM.
A
kinetic
study
showed
pseudo
second
order
model
well
fitted
rather
than
first
order.
Three
isotherm
models
Freundlich,
Langmuir,
Temkin
explain
isotherms
by
Langmuir
isotherm,
which
explains
existence
monolayer
adsorption,
process.
Considering
model,
capacity
(qmax)
calculated
75.757
83.963
mg
g-1
Pb,
respectively,
agreement
with
obtained
experimental
values.
Desorption
investigations
carried
out
evaluate
reusability
recovery
ions.
It
desorption
above
90%.
proven
be
cost-effective
removing
especially
solutions,
process
is
eco-friendly,
feasible,
reliable.
