Environmental Pollutants and Bioavailability,
Journal Year:
2024,
Volume and Issue:
36(1)
Published: Aug. 14, 2024
Chromium
exists
from
both
natural
geological
processes
and
human
actions,
it
has
a
substantial
impact
on
health
ecosystems.
This
study
addresses
the
major
challenges
in
using
biochar
as
an
environmentally
friendly,
sustainable,
economical
sorbent
for
removing
chromium
hexavalent
throughout
remediation
process.
The
results
exhibited
that
produced
non-woody
feedstocks
pyrolyzed
at
(300°C
−700°C)
significantly
large
amount
of
various
functional
groups,
higher
pH
(7
to
11.10)
CEC
(27
21.70
cmol
kg−1),
greater
surface
area
(2–300
m2g−1),
O/C
H/C
ratios
with
increasing
carbonization
temperature,
adsorption
capacities
(1.63
435
mg
g)
superior
performance
removal
compared
biochars
woody-biomass.
use
equilibrium
isotherm,
thermodynamic,
kinetic
models
aids
comprehending
interactions
between
biochar,
well
their
processes.
Water,
Journal Year:
2024,
Volume and Issue:
16(14), P. 2050 - 2050
Published: July 19, 2024
Microplastics
are
omnipresent
in
aquatic
environments
and
can
act
as
vectors
to
carry
other
pollutants,
modifying
their
pathway
through
the
systems.
In
this
study,
differences
adsorption
capacity
mechanism
for
Cr(VI)
sorption
with
polyethylene
(PE,
a
conventional
microplastic)
polylactic
acid
(PLA,
biodegradable
were
investigated
via
characterization
of
MPs,
determination
kinetic
behavior
(pseudo-first-
second-order
model,
Elovich
model),
degree
fit
Langmuir
Freundlich
isothermal
models;
was
also
studied
under
different
solution
conditions.
The
results
indicated
that
when
dose
MPs
1
g/L,
on
reached
highest
value,
capacities
PLA(0.415
mg/g)
>
PE(0.345
mg/g).
PE
followed
isotherm
while
PLA
had
stronger
model.
Sorption
both
cases
pseudo-first-order
kinetics
maximum
(0.54
is
higher
than
(0.38
addition,
could
reach
equilibrium
about
8
h
adsorb
72.3%
total
within
4
h,
required
16
equilibrium,
suggesting
adsorbs
at
significantly
faster
rate
PE.
Thus,
like
may
serve
superior
carrier
environments.
When
pH
increased
from
2
6,
by
decreased
0.49
mg/g
0.52
0.27
0.26
mg/g,
respectively.
concentration
sodium
dodecyl
sulfate
nil
300
mg/L,
3.66
3.05
times,
temperature
presence
Cu2+
photoaging
promoted
salinity
inhibited
adsorption.
desorption
efficiencies
PLA(57.8%)
PE(46.4%).
further
confirmed
be
attributed
electrostatic
attraction,
hydrogen
bonding,
surface
complexation.
sum,
potentially
better
PE,
but
risk
associated
might
Environmental Pollutants and Bioavailability,
Journal Year:
2024,
Volume and Issue:
36(1)
Published: Aug. 14, 2024
Chromium
exists
from
both
natural
geological
processes
and
human
actions,
it
has
a
substantial
impact
on
health
ecosystems.
This
study
addresses
the
major
challenges
in
using
biochar
as
an
environmentally
friendly,
sustainable,
economical
sorbent
for
removing
chromium
hexavalent
throughout
remediation
process.
The
results
exhibited
that
produced
non-woody
feedstocks
pyrolyzed
at
(300°C
−700°C)
significantly
large
amount
of
various
functional
groups,
higher
pH
(7
to
11.10)
CEC
(27
21.70
cmol
kg−1),
greater
surface
area
(2–300
m2g−1),
O/C
H/C
ratios
with
increasing
carbonization
temperature,
adsorption
capacities
(1.63
435
mg
g)
superior
performance
removal
compared
biochars
woody-biomass.
use
equilibrium
isotherm,
thermodynamic,
kinetic
models
aids
comprehending
interactions
between
biochar,
well
their
processes.
