Molecules,
Journal Year:
2023,
Volume and Issue:
28(6), P. 2444 - 2444
Published: March 7, 2023
Resins
have
enormous
potential
in
the
removal
of
naphthenic
acids
(NAs)
from
transformer
oil
due
to
their
rich
porosity
and
high
mechanical
diversified
functionality,
whereas
poor
adsorption
capacity
limits
application.
In
this
work,
polystyrene-diethylamine
resin
(PS-DEA-x)
was
prepared
by
grafting
diethylamine
(DEA)
onto
chloromethylated
polystyrene
(PS-Cl)
efficiently
adsorb
cyclopentane
carboxylic
acid
for
first
time.
The
characterization
analysis
results
indicated
that
amine
contents
were
significantly
enhanced
with
increase
DEA.
Particularly,
a
molar
ratio
1:5
depending
on
chloromethyl
DEA
(PS-DEA-5)
exhibited
highest
efficient
(static
up
110.0
mg/g),
which
about
5
times
higher
than
pristine
PS-Cl.
thermodynamic
kinetic
studies
showed
behaviors
could
be
well
fitted
Langmuir
isotherm
equation
pseudo-second-order
rate
equation.
Moreover,
it
found
1
g
PS-DEA-5
can
decontaminate
760
mL
meet
reuse
standards
continuous
stream,
indicating
its
application
industry.
Energies,
Journal Year:
2022,
Volume and Issue:
15(20), P. 7765 - 7765
Published: Oct. 20, 2022
252
literature
sources
and
about
5000
crude
oil
assays
were
reviewed
in
this
work.
The
review
has
shown
that
the
petroleum
characterization
can
be
classified
three
categories:
assay;
SARA
characterization;
molecular
characterization.
It
was
found
range
of
property
variation
is
so
wide
same
cannot
measured
by
use
a
single
standard
method.
To
best
our
knowledge
for
first
time
application
additive
rule
to
predict
asphaltene
content
from
vacuum
residue
multiplied
TBP
yield
examined.
also
discovered
strong
linear
relation
between
contents
C5-,
C7-asphaltenes
derived
thereof
fraction
exists.
six
parameter
Weibull
extreme
function
showed
fit
data
all
types,
allowing
construction
correct
curve
detection
measurement
errors.
A
new
reconstitution
approach
proposed
overcome
poor
analysis
mass
balance
when
oils
with
lower
density
are
analyzed.
chemometric
combination
spectroscopic
very
helpful
extracting
information
composition
complex
matrices
consisting
large
number
components.
The Science of The Total Environment,
Journal Year:
2025,
Volume and Issue:
964, P. 178508 - 178508
Published: Jan. 25, 2025
Decades
of
research
demonstrated
that
microbes
can
remediate
petroleum-contaminated
environments
through
biodegradation
hydrocarbons.
Recent
studies
have
applied
signature
metabolite
analysis
to
investigate
hydrocarbon-contaminated
sites,
focusing
primarily
on
aquifer
systems
and
metabolites
relatively
water-soluble
monoaromatic
However,
the
number
involving
non-targeted
identification
individual
in
environmental
samples
is
limited.
In
addition,
patterns
crude
oil-contaminated
are
rarely
compared
those
unaltered
oils.
this
study,
we
identified
complex
oils
from
a
former
oil
sands
mining
site
using
gas
chromatography-mass
spectrometry.
Based
these
results,
suggest
potential
processes
may
account
for
formation
observed
metabolites.
The
non-target
results
water
contaminated
with
showed
aromatic
acids
were
dominant
We
arylacetic
particularly
abundant
when
found
formerly
produced
at
site,
as
well
soil
samples.
dominance
evidence
microbial
communities
limited
capacity
α-oxidation,
i.e.
an
enzymatic
attack
methylene
group,
which
necessary
further
degrade
compounds.
Therefore,
be
enriched
sites
long-term
exposure
oil.
Our
study
demonstrates
provide
insight
into
prevalent
pattern
carboxylic
acid
degradation
habitats.
Humic
acid
(HA)
enhances
colloidal
transport
in
porous
media,
yet
the
mechanisms
by
which
HA
adsorption
conformation
affects
colloid
remain
unclear.
This
study
investigated
influence
of
on
petroleum-hydrocarbon-contaminated
soil
colloids
(TPHs-SC)
saturated
sand
columns.
The
presence
TPHs
surface
occupied
sites,
hindering
from
forming
a
horizontal
conformation,
as
observed
uncontaminated
(SC).
Instead,
vertical
was
formed,
reducing
overall
HA.
Vertically
adsorbed
increased
diffuse
double-layer
potential
and
extended
Derjaguin-Landau-Verwey-Overbeek
energies
between
water-bearing
media.
evidenced
higher
ζ
potentials
(-28.5
to
-34.0
mV)
enhanced
TPHs-SC
compared
SC
(ζ
ranging
-25.2
-29.5
HA,
particularly
under
alkaline
conditions.
Additionally,
weak
van
der
Waals
electrostatic
interactions
near
surfaces
free
HA/TPHs
formed
zonal
distribution,
facilitating
cotransport
with
TPHs.
These
findings
underscore
significance
provide
insights
into
critical
an
environmental
structural
chemistry
perspective.
