Minerals,
Journal Year:
2025,
Volume and Issue:
15(2), P. 138 - 138
Published: Jan. 30, 2025
The
raspberry-red
grossular,
discovered
in
the
Sierra
de
Cruces
Coahuila,
Mexico,
is
characterized
by
its
zoned
coloration,
featuring
a
pink
rim
and
black
mantle
with
sharp
color
transition
at
border.
However,
there
notable
lack
of
definitive
systematic
identification
characteristics
pertaining
to
special
zones.
mineral
chemical
composition
chromogenic
mechanism
remain
unsupported
empirical
validation
derived
from
specific
experimental
data.
In
this
study,
gemological
properties,
composition,
spectral
are
systematically
analyzed
explore
formation
zonal
genesis.
results
X-ray
diffraction
pattern,
Raman
spectrum,
major
elements’
show
that
grossular
samples
high
purity.
Mn
ions
direct
coloring
factor
samples,
while
Fe
elements
mantle.
MnO
content
ranges
0.15
wt%
1.72
wt%.
FeO
3.11
5.09
wt%,
which
generally
higher
than
other
parts.
trace
element
compositions
reveal
core
were
formed
an
oxidative
environment
(δEu
=
0.43–2.41),
could
be
hydrothermal
metasomatic
skarn
(δ18O
11.03–12.14);
mantles
reducing
0.42–0.85),
consistent
magmatic
11.40–11.66).
They
also
surrounding
rocks
provide
part
compositional
sources
for
interact
mantle,
affects
rim.
This
study
offers
geological
insights,
addressing
significant
void
lays
foundation
follow-up
investigations.
ACS Catalysis,
Journal Year:
2024,
Volume and Issue:
14(6), P. 4040 - 4052
Published: Feb. 29, 2024
Environmental
decontamination
relies
on
low-cost,
sustainable
materials
to
drive
diverse
catalytic
redox
reactions.
In
this
work,
we
used
low-cost
biomass
develop
nanocomposites
of
N-doped
carbon-supported
zinc
oxide
(ZNC400)
at
a
low
temperature
(400
°C),
which
exhibited
ultrahigh
activity
in
heterogeneous
ozonation
(HCO)
for
organic
water
decontamination.
Our
experimental
and
computational
studies
revealed
the
collaborative
functions
dual
active
centers
defective
carbons
oxygen
vacancies
(OVs)-containing
(ZnO)
composite
interface
successive
ozone
(O3)
adsorption
decomposition,
respectively.
Inspiringly,
OVs
ZnO
will
spontaneously
dissociate
molecules
(H2O)
form
surface
hydroxyl
groups
(–OH)
as
key
intermediates
accelerate
O3
decomposition.
This
synergistic
interplay
results
continuous
generation
radicals
(•OH)
maintains
over
90.2%
atrazine
(ATZ)
removal
five
cycles,
endowing
ZNC400
with
substantial
reusability.
Furthermore,
four
ATZ
degradation
pathways
were
proposed,
corresponding
toxicity
was
evaluated
by
embryonic
development
zebrafish
treated
water.
Overall,
engineered
dual-function
catalyst
effectively
addresses
long-standing
issue
poor
stability
carbon
HCO
offers
high-performance,
cheap,
green
catalysts
advanced
purification.
The Journal of Chemical Physics,
Journal Year:
2025,
Volume and Issue:
162(1)
Published: Jan. 2, 2025
Amorphous-dominated
magnesium
oxide
hollow
spheres
(A-MgO)
were
prepared
using
a
spray-drying
method
in
this
study.
These
exhibited
excellent
sphericity,
large
specific
surface
areas,
and
abundant
porosity.
A-MgO
outstanding
fluoride
adsorption
properties,
with
maximum
capacity
of
260.4
mg/g.
When
the
pH
value
was
less
than
8,
removal
percentage
remained
more
87.4%.
Moreover,
above
75%
even
after
five
application
cycles.
In
addition,
research
revealed
that
SO42-,
CO32-,
PO43-
exerted
pronounced
effect
on
removal,
whereas
coexisting
ions
such
as
Br-,
Cl-,
NO3-,
HCO3-
had
minimal
impact
process.
An
in-depth
analysis
mechanism
demonstrated
process
by
involves
various
synergistic
mechanisms,
electrostatic
adsorption,
ion
exchange,
oxygen
vacancy
physical
pore
filling.
To
predict
performance
under
complex
conditions,
high-performance
machine
learning
model,
GBDT-S,
developed
hyperparameter
optimization.
The
R2
0.99
0.80
for
training
testing
datasets,
respectively,
RMSE
3.26
3.89.
Interpretative
SHapley
Additive
exPlanations
technology
indicated
reaction
time,
concentration,
key
factors
influencing
percentage.
