The Science of The Total Environment,
Год журнала:
2022,
Номер
817, С. 152518 - 152518
Опубликована: Янв. 4, 2022
This
work
provides
a
screening
of
organic
contaminants
and
characterization
the
dissolved
matter
in
sewer
network
until
municipal
wastewater
treatment
plant
(WWTP),
identifying
areas
with
higher
degree
contamination
their
impact
on
WWTP
performance,
particularly
activated
sludge
reactor.
Three
monitoring
campaigns
were
carried
out
at
six
selected
locations
sewage
system
(PVZ-1,
PVZ-2,
PS-F,
PS-VC,
CP-VC,
PS-T),
influent
(WWTPINF)
effluent
(WWTPEFF)
WWTP.
Advanced
analytical
techniques
employed,
namely
excitation/emission
matrix
fluorescence-parallel
factor
analysis
(EEM-PARAFAC),
size
exclusion
chromatography
carbon
detector
(SEC-OCD),
liquid
high-resolution-mass
spectrometric
detection
(LC-HRMS).
EEM-PARAFAC
showed
fluorescence
intensity
for
protein-like
component
(C2),
CP-VC
(near
seafood
industries)
associated
presence
surfactants
(~50
mg/L).
SEC-OCD
highlighted
efficiency
removing
low
molecular
weight
acids
neutrals.
LC-HRMS
tentatively
identified
108
compounds
emerging
concern
(CEC)
similar
patterns
obtained
all
samples,
except
PVZ-2
(lower
detection),
many
which
occurred
effluent.
Eight
CECs
included
relevant
Watch-Lists
detected
WWTPEFF
samples.
Furthermore,
111
detected,
classes
more
frequently
found
being
alcohol
ethoxylates
(AEOs),
nonylphenol
polyethoxylates
(NPEOs)
linear
alkylbenzene
sulphonates
(LAS).
The
continuous
LAS
NPEOs
allied
to
concentrations
WWTPINF
15-20
mg/L,
location
(linked
food
as
an
important
contributor,
explain
morphological
changes
high
content
dewatered
sludge,
may
have
impacted
performance.
Journal of Molecular Liquids,
Год журнала:
2022,
Номер
368, С. 120789 - 120789
Опубликована: Ноя. 13, 2022
The
substitution
of
conventional
organic
solvents
for
others
with
less
environmental
impact
is
one
the
basic
premises
green
chemistry.
To
carry
this
out
optimally,
tools
based
on
similarity
thermophysical
behaviour
are
being
developed.
Thus,
characterization
new
a
key
step
in
any
field
application.
In
work,
we
studied
eutectic
hydrophobic
thymol
+
l-menthol
system.
solid–liquid
equilibrium
system
and
several
properties
three
its
mixtures
close
to
composition
were
measured
discussed.
Calculations
correlations
performed
obtain
interest
such
as
internal
pressure,
critical
temperature,
solubility
parameter,
among
others.
predict
under
operating
conditions,
PC-SAFT
equation
state
was
validated.
Considering
problem
presence
drugs
micro
pollutants
environment,
ability
both
dissolve
remove
them
from
contaminated
water
also
analysed.
results
showed
strong
thymol-l-menthol
interaction,
higher
ratio
made
liquid
more
compact
structured
but
polar
viscous.
difference
densities
respect
that
moderate
viscosity
values
indicated
can
be
an
adequate
solvent
liquid–liquid
extraction
processes.
solubilities
quercetin
(Q),
nitrofurantoin
(NF)
tetracycline
(TC)
enhanced
mixtures;
Q,
10000-fold
than
water.
Finally,
could
used
traces
Q
NF
water,
efficiency
up
81
%.
