Materials,
Journal Year:
2024,
Volume and Issue:
17(11), P. 2636 - 2636
Published: May 29, 2024
Copper-containing
sludge
is
a
common
by-product
of
industrial
activities,
particularly
electroplating
and
metal
processing.
This
type
contains
high
concentrations
heavy
metals
such
as
copper,
which
can
pose
potential
threat
to
the
environment.
Therefore,
its
treatment
disposal
require
special
attention.
Due
efficient
mass
heat
transfer
characteristics,
suspended
state
technology
has
shown
significant
for
application
in
number
key
processes,
including
drying,
decomposition,
reduction
copper-containing
sludge.
paper
presents
an
in-depth
analysis
current
status
Based
on
this
analysis,
device
was
designed,
through
characteristics
oxidative
decomposition
phases
are
investigated.
The
research
objects
were
gas
concentration,
temperature,
contact
state,
particle
size
time.
Orthogonal
experiments
initially
employed
investigate
relationship
between
influencing
factors
conversion
rate
copper
oxides.
followed
by
single-factor
influence
study,
led
determination
optimal
process
parameters
Cu-containing
oxidizing
atmosphere.
100
μm
reacted
with
10%
O2
at
flow
1
m/s
3
min
under
condition
900
°C.
then
determined
follows:
rate.
experiments.
200
5
7%
carbon
monoxide
1.5
800
Environmental Chemistry Letters,
Journal Year:
2023,
Volume and Issue:
21(6), P. 3329 - 3350
Published: May 22, 2023
Abstract
The
global
transition
to
a
circular
economy
calls
for
research
and
development
on
technologies
facilitating
sustainable
resource
recovery
from
wastes
by-products.
Metal-bearing
materials,
including
electronic
wastes,
tailings,
metallurgical
by-products,
are
increasingly
viewed
as
valuable
resources,
with
some
possessing
comparable
or
superior
quality
natural
ores.
Bioleaching,
an
eco-friendly
cost-effective
alternative
conventional
hydrometallurgical
pyrometallurgical
methods,
uses
microorganisms
their
metabolites
extract
metals
unwanted
metal-bearing
materials.
performance
of
bioleaching
is
influenced
by
pH,
solid
concentration,
energy
source,
agitation
rate,
irrigation
aeration
inoculum
concentration.
Optimizing
these
parameters
improves
yields
encourages
the
wider
application
bioleaching.
Here,
we
review
microbial
diversity
specific
mechanisms
metal
recovery.
We
describe
current
operations
approaches
at
various
scales
summarise
influence
broad
range
operational
parameters.
Finally,
address
primary
challenges
in
scaling
up
applications
propose
optimisation
strategy
future
research.
Materials,
Journal Year:
2024,
Volume and Issue:
17(7), P. 1707 - 1707
Published: April 8, 2024
The
disposal
of
electroplating
sludge
(ES)
is
a
major
challenge
for
the
sustainable
development
industry.
ESs
have
significant
environmental
impact,
occupying
valuable
land
resources
and
incurring
high
treatment
costs,
which
increases
operational
expenses
companies.
Additionally,
concentration
hazardous
substances
in
ES
poses
serious
threat
to
both
environment
human
health.
Despite
extensive
scholarly
research
on
harmless
resource
utilization
ES,
current
technology
processes
are
still
unable
fully
harness
its
potential.
This
results
inefficient
potential
hazards.
article
analyzes
physicochemical
properties
discusses
ecological
hazards,
summarizes
progress
treatment,
elaborates
methods
such
as
solidification/stabilization,
heat
wet
metallurgy,
pyrometallurgy,
biotechnology,
material
utilization.
It
provides
comparative
summary
different
while
also
discussing
challenges
future
directions
technologies
aimed
at
effectively
utilizing
resources.
objective
this
text
provide
useful
information
how
address
issue
promote
Heliyon,
Journal Year:
2024,
Volume and Issue:
10(7), P. e29018 - e29018
Published: April 1, 2024
Biodiesel
production
processes,
such
as
gravity
settling,
have
limitations
in
terms
of
biodiesel
yield,
purification
efficiency,
operating
time
the
separation
process,
and
more
extensive
equipment.
Therefore,
this
study
has
focused
on
using
a
recently
developed
centrifuge
machine
for
to
address
these
challenges
due
its
compact
design,
high
simplicity.
Additionally,
aimed
optimize
efficiency
glycerol
from
machine,
employing
response
surface
methodology
(RSM)
with
central
composite
design
(CCD).
The
optimum
conditions
separating
via
are
rotation
speed
1800
rpm,
mixture
flow
rate
192.25
ml/min,
temperature
55
°C,
respectively.
In
conditions,
94.52%
was
achieved.
can
be
improved,
leading
higher
yields
greater
purity.
utilization
RSM
proved
valuable
determining
separation.
Furthermore,
successfully
separated
meet
ASTM
D6751
EN
14,214
standards.
results
highlight
potential
efficient
reliable
production,
contributing
advancement
industry.
