SSRN Electronic Journal,
Год журнала:
2022,
Номер
unknown
Опубликована: Янв. 1, 2022
The
removal
of
contaminants
emerging
concern
and
antibiotic
resistance
genes
(ARGs)
were
investigated
at
pilot-scale
with
partially
saturated
vertical
flow
constructed
wetland
bioaugmented
or
not
the
Trichoderma
asperellum
T34
strain
by
means
non-target
liquid
chromatography
high-resolution
mass
spectrometry
SmartChip™
Real-Time
PCR
methodological
approaches.
High
variability
in
efficiency
along
a
four-week
experiment
precluded
to
statically
conclude
that
bioaugmentation
was
able
significantly
improve
treatment
performances
for
most
CECs
except
diclofenac
benzotriazole.
Trichodermasp.
grew
fed
secondary
treated
domestic
wastewater
but
quick
wash-out
external
secreted
laccase
peroxidase
enzymes
likely
occurred.
In
contrast,
there
clear
relationship
between
biodegradability
as
well
sorption
capacity
identified
compounds.
As
expected,
biodegradation
main
driver
accounting
moderate
when
log
Dow
<
3.
However,
types
reaction
(hydrolysis
vs
oxidation
reactions)
key
determinant
rates
rather
substituents
functional
groups
chemical
structures
leading
different
levels
electronic
steric
hindrances.
Sorption
prevailed
over
only
hydrophobic
(log
>
3)
slowly
biodegradable
fate
selected
transformation
products
(TPs)
could
also
be
first
time
such
treatments.
formation
persistence
N-oxide
TPs
highlighted
while
which
prone
undergo
further
N-dealkylation
hydroxylation
partly
eliminated.
Noteworthy
exception
14-hydroxyclarithromycin
tended
accumulate
preserving
an
antimicrobial
activity.
Investigated
treatments
did
reduce
overall
bacterial
load
flowing
water.
may
have
cause
shift
ARGs
composition
no
statistical
difference
average
rates.
Industrial & Engineering Chemistry Research,
Год журнала:
2023,
Номер
62(26), С. 10184 - 10194
Опубликована: Июнь 6, 2023
The
hydrophilic
ionic
liquid
(IL)
[EMIM][BF4]
was
adopted
to
absorb
two
chlorinated
volatile
organic
compounds
(CVOCs),
named
1,2-dichloroethane
and
1,1,2-trichloroethane.
First,
screened
out
as
the
optimal
absorbent
from
69
IL
candidates
by
COSMO-RS
model.
Then,
CVOC
absorption
experiments
were
conducted
using
[EMIM][TF2N].
shows
highest
rate
for
both
(95.81%)
1,1,2-trichloroethane
(84.91%).
Quantum
chemical
calculations
show
that
strong
intermolecular
electrostatic
interaction
van
der
Waals
promote
of
CVOCs
[EMIM][BF4].
Subsequently,
industrial-scale
capture
processes,
simulation
optimization,
carried
with
TEG
absorbents,
attain
goal
reducing
concentration
in
gas
stream
500
ppm
(in
mole
fraction).
result
has
a
higher
processing
capacity
lower
heat
duty
under
operating
conditions.
Water Science & Technology Water Supply,
Год журнала:
2022,
Номер
22(5), С. 5589 - 5602
Опубликована: Март 11, 2022
Abstract
As
a
kind
of
refractory
chlorinated
hydrocarbon,
1,2-dichloroethane
(1,2-DCA)
has
been
frequently
detected
in
contaminated
groundwater,
and
it
is
hard
for
common
technology
to
degrade
due
its
stability.
Moreover,
the
existence
1,2-DCA
can
do
harm
human
organs.
Hence,
urgent
develop
an
effective
remediation
1,2-DCA-contaminated
groundwater.
In
this
study,
calcium
peroxide
(CaO2)
system
activated
by
Fe(III)
was
applied
degradation
83.3%
could
be
effectively
removed
within
3
h
when
molar
ratio
CaO2/Fe(III)/1,2-DCA
30/120/1.
The
results
probe
experiments,
electron
paramagnetic
resonance
(EPR)
detection,
scavenging
tests
demonstrated
that
both
HO•
O2−•
were
key
factors
degradation.
released
amount
Cl−
(84.1%)
revealed
most
chlorine
dechlorinated.
GC-MS
detection
intermediates
during
possible
pathway
proposed
first
reduced
vinyl
chloride
(VC)
then
oxidized
CO2
H2O.
Finally,
73.4%
removal
achieved
actual
groundwater
100/400/1,
demonstrating
CaO2/Fe(III)
remarkable
prospect
remediation.
Environments,
Год журнала:
2022,
Номер
9(11), С. 139 - 139
Опубликована: Ноя. 8, 2022
Many
agricultural
areas
are
contaminated
by
heavy
metals
to
such
a
level
that
the
growth
of
plants
is
drastically
reduced.
Based
on
site’s
specific
characteristics,
feasibility
studies
were
carried
out
choose
most
effective
technologies.
Feasibility
tests
showed
soil
washing
and
phytoremediation
technologies
could
be
used
at
site
under
study.
The
efficiency
highly
dependent
which
determine
chemical
form
metals.
results
indicate
water-based
can
successfully
with
possibility
reaching
remediation
objectives
quickly.
However,
technology
in
first
step
essentially
breaks
down
soil.
Moreover,
cannot
directly
overcome
toxicity
derived
from
very
high
bioavailability
Still,
there
need
use
“assisted”
adding
compost
reduces
metal
bioavailability,
allowing
phytoextraction.
In
this
case,
longer
time
needed
reach
target.
provide
preliminary
scenario
for
decision-makers
stakeholders
assess
possible
applicable
scheme
applied
similar
cases
polluted
areas.
Water,
Год журнала:
2023,
Номер
15(8), С. 1463 - 1463
Опубликована: Апрель 8, 2023
Wastewater
from
factories
producing
polysulfone-based
membranes
mainly
contains
the
used
organic
solvent,
i.e.,
dimethylacetamide
(DMAc).
Due
to
environmental
impact
of
DMAc,
wastewater
treatment
is
mandatory.
Several
biological
options
based
on
activated
sludge
process
are
described
in
literature.
artificial
aeration,
these
techniques
have
high
energy
requirements.
Near-nature
processes
such
as
vertical
flow
constructed
wetlands
(VF
wetlands)
a
low
demand,
tolerance
load
fluctuations,
and
maintenance
Therefore,
high-loaded,
two-stage
VF
an
efficient
option
for
treating
wastewater.
However,
so
far
only
been
limited
extent
industrial
In
present
study,
ability
laboratory-scale,
high-load,
treat
DMAc
was
investigated.
This
included
their
degradation
efficiency
corresponding
pathways,
removal
total
carbon
(TOC),
nitrification
denitrification
nitrogen,
well
ecotoxicological
effects
(mutagenicity,
genotoxicity,
reactive
oxygen
species)
untreated
treated
The
focus
determine
effect
different
grain
size
distributions
rates,
maximum
inflow
loading,
concentrations
effluent
concentrations.
general,
completely
degraded
using
wetlands,
with
dimethylamine
(DMA)
identified
main
intermediate.
TOC
rates
reached
more
than
99%.
nitrogen
bound
nitrified.
start-up
without
seeded
filter
material
temporarily
leads
nitrite
accumulation.
may
affect
mutagenicity
results
show
that
effective
containing
higher
comparable
processes.
SSRN Electronic Journal,
Год журнала:
2022,
Номер
unknown
Опубликована: Янв. 1, 2022
The
removal
of
contaminants
emerging
concern
and
antibiotic
resistance
genes
(ARGs)
were
investigated
at
pilot-scale
with
partially
saturated
vertical
flow
constructed
wetland
bioaugmented
or
not
the
Trichoderma
asperellum
T34
strain
by
means
non-target
liquid
chromatography
high-resolution
mass
spectrometry
SmartChip™
Real-Time
PCR
methodological
approaches.
High
variability
in
efficiency
along
a
four-week
experiment
precluded
to
statically
conclude
that
bioaugmentation
was
able
significantly
improve
treatment
performances
for
most
CECs
except
diclofenac
benzotriazole.
Trichodermasp.
grew
fed
secondary
treated
domestic
wastewater
but
quick
wash-out
external
secreted
laccase
peroxidase
enzymes
likely
occurred.
In
contrast,
there
clear
relationship
between
biodegradability
as
well
sorption
capacity
identified
compounds.
As
expected,
biodegradation
main
driver
accounting
moderate
when
log
Dow
<
3.
However,
types
reaction
(hydrolysis
vs
oxidation
reactions)
key
determinant
rates
rather
substituents
functional
groups
chemical
structures
leading
different
levels
electronic
steric
hindrances.
Sorption
prevailed
over
only
hydrophobic
(log
>
3)
slowly
biodegradable
fate
selected
transformation
products
(TPs)
could
also
be
first
time
such
treatments.
formation
persistence
N-oxide
TPs
highlighted
while
which
prone
undergo
further
N-dealkylation
hydroxylation
partly
eliminated.
Noteworthy
exception
14-hydroxyclarithromycin
tended
accumulate
preserving
an
antimicrobial
activity.
Investigated
treatments
did
reduce
overall
bacterial
load
flowing
water.
may
have
cause
shift
ARGs
composition
no
statistical
difference
average
rates.
