Environmental Science & Technology,
Journal Year:
2023,
Volume and Issue:
58(1), P. 510 - 521
Published: Dec. 15, 2023
Fluorinated
liquid
crystal
monomers
(FLCMs)
have
been
suggested
as
emerging
contaminants,
raising
global
concern
due
to
their
frequent
occurrence,
potential
toxic
effects,
and
endurance
capacity
in
the
environment.
However,
environmental
fate
of
FLCMs
remains
unknown.
To
fill
this
knowledge
gap,
we
investigated
aerobic
microbial
transformation
mechanisms
an
important
FLCM,
4-[difluoro(3,4,5-trifluorophenoxy)methyl]-3,
5-difluoro-4′-propylbiphenyl
(DTMDPB),
using
enrichment
culture
termed
BG1.
Our
findings
revealed
that
67.5
±
2.1%
initially
added
DTMDPB
was
transformed
10
days
under
optimal
conditions.
A
total
14
products
obtained
a
series
reactions
(e.g.,
reductive
defluorination,
ether
bond
cleavage,
demethylation,
oxidative
hydroxylation
aromatic
ring
opening,
sulfonation,
glucuronidation,
O-methylation,
thiolation)
were
identified.
Consortium
BG1
harbored
essential
genes
could
transform
DTMDPB,
such
dehalogenation-related
[e.g.,
glutathione
S-transferase
gene
(GST),
2-haloacid
dehalogenase
(2-HAD),
nrdB,
nuoC,
nuoD];
hydroxylating-related
hcaC,
ubiH,
COQ7;
opening-related
ligB
catE;
methyltransferase
ubiE
ubiG.
Two
DTMDPB-degrading
strains
isolated,
which
are
affiliated
with
genus
Sphingopyxis
Agromyces.
This
study
provides
novel
insight
into
FLCMs.
The
implications
for
development
bioremediation
strategies
aimed
at
addressing
sites
contaminated
Environmental Science & Technology,
Journal Year:
2023,
Volume and Issue:
58(1), P. 510 - 521
Published: Dec. 15, 2023
Fluorinated
liquid
crystal
monomers
(FLCMs)
have
been
suggested
as
emerging
contaminants,
raising
global
concern
due
to
their
frequent
occurrence,
potential
toxic
effects,
and
endurance
capacity
in
the
environment.
However,
environmental
fate
of
FLCMs
remains
unknown.
To
fill
this
knowledge
gap,
we
investigated
aerobic
microbial
transformation
mechanisms
an
important
FLCM,
4-[difluoro(3,4,5-trifluorophenoxy)methyl]-3,
5-difluoro-4′-propylbiphenyl
(DTMDPB),
using
enrichment
culture
termed
BG1.
Our
findings
revealed
that
67.5
±
2.1%
initially
added
DTMDPB
was
transformed
10
days
under
optimal
conditions.
A
total
14
products
obtained
a
series
reactions
(e.g.,
reductive
defluorination,
ether
bond
cleavage,
demethylation,
oxidative
hydroxylation
aromatic
ring
opening,
sulfonation,
glucuronidation,
O-methylation,
thiolation)
were
identified.
Consortium
BG1
harbored
essential
genes
could
transform
DTMDPB,
such
dehalogenation-related
[e.g.,
glutathione
S-transferase
gene
(GST),
2-haloacid
dehalogenase
(2-HAD),
nrdB,
nuoC,
nuoD];
hydroxylating-related
hcaC,
ubiH,
COQ7;
opening-related
ligB
catE;
methyltransferase
ubiE
ubiG.
Two
DTMDPB-degrading
strains
isolated,
which
are
affiliated
with
genus
Sphingopyxis
Agromyces.
This
study
provides
novel
insight
into
FLCMs.
The
implications
for
development
bioremediation
strategies
aimed
at
addressing
sites
contaminated
