The Science of The Total Environment,
Journal Year:
2022,
Volume and Issue:
817, P. 152518 - 152518
Published: Jan. 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 Cleaner Production,
Journal Year:
2022,
Volume and Issue:
348, P. 131280 - 131280
Published: March 15, 2022
Preparing
sustainable
and
highly
efficient
biochars
as
adsorbents
remains
a
challenge
for
organic
pollutant
management.
Herein,
novel
nitrogen-doped
carbon
material
has
been
synthesized
via
facile
single-step
pyrolysis
method
using
wild
mixture
of
microalgae
precursor.
Phosphoric
acid
(H3PO4)
was
employed
activation
agent
to
generate
pores
in
the
material.
In
addition,
effect
melamine
(nitrogen
source)
evaluated
over
biochar
properties
by
N-doping
process.
The
results
showed
that
biochar's
specific
surface
area
(SSA)
increased
from
324
433
m2
g−1
with
process
percentage
micropores
structure.
Chemical
characterization
indicated
helped
increase
graphitization
contents
oxygen
nitrogen
groups
on
surface.
were
successfully
tested
adsorb
acetaminophen
treat
two
synthetic
effluents,
N-doped
presented
highest
efficiency.
kinetics
equilibrium
data
well
represented
General-order
model
Liu
isotherm
model,
respectively.
maximum
sorption
capacities
attained
101.4
120.7
mg
non-doped
doped
biochars,
adsorption
mechanism
suggests
pore-filling
dominant
uptake.
could
efficiently
remove
up
74%
contaminants
effluents.
