Minerals,
Journal Year:
2024,
Volume and Issue:
14(12), P. 1231 - 1231
Published: Dec. 3, 2024
Two
common
iron
oxide-bearing
wastes—a
drinking
water
treatment
residual
and
a
passive
mine
sludge
(MWTS)—were
utilised
with
without
modification
as
media
in
microcosm
experiments
to
treat
artificial
benzene,
toluene,
ethylbenzene,
xylene
(BTEX)-contaminated
wastewater.
In
all
cases,
the
removal
of
BTEX
was
observed
over
160-day
experiments,
benzene
being
most
recalcitrant.
The
solubilisation
observed,
which,
alongside
syntropic
relationship
between
methanogens
firmicutes,
allowed
several
anaerobic
processes
occur,
including
reduction
concert
biodegradation
BTEX.
Nitrogen
sparging
prior
establishment,
compared
aeration,
seen
lead
greater
subsequent
BTEX,
indicating
that
conditions
favoured
removal.
rates
indicated
these
wastes,
an
abundant
waste
stream,
may
be
interesting
candidate
for
cost-effective
remediation
applications
such
permeable
reactive
barriers.
Environments,
Journal Year:
2024,
Volume and Issue:
11(10), P. 221 - 221
Published: Oct. 11, 2024
This
study
was
conducted
to
investigate
the
presence
of
benzene
in
ground
and
drinking
water
eastern
Niger
Delta,
where
multiple
oil
gas
production
facilities
are
present.
Samples
from
wells
were
collected
for
measurements
benzene,
toluene,
ethylbenzene,
xylenes
(BTEX).
Additionally,
dissolved
organic
carbon
(DOC)
concentration
determined
first
time
establish
groundwater’s
total
hydrocarbon
non-hydrocarbon
load.
The
groundwater
BTEX
levels
up
3904
µg/L
3500
µg/L,
respectively.
DOC
concentrations
49
mg/L.
highest
detected
near
an
underground
petroleum
pipeline.
However,
decreased
with
distance
pipeline
less
than
0.1
µg/L.
Despite
contamination,
aquifer
has
shown
promising
aerobic
attenuation
potential,
having
a
7.5
(95%)
mg/L
DO
level
2.11
biodegradation
capacity
DO.
high
temperature
32.5
°C
may
weaken
attenuation.
point
rates
ranged
0.128
0.693
day−1
0.086
0.556
day−1,
Hence,
by
natural
alone,
66.5
85
years
would
be
required
reach
Nigeria’s
remediation
goals,
Water Research X,
Journal Year:
2024,
Volume and Issue:
26, P. 100290 - 100290
Published: Dec. 2, 2024
Hydrophobic
organic
pollutants
in
aqueous
environments
are
challenging
to
biodegrade
due
limited
contact
between
microorganisms,
the
and
electron
acceptor,
particularly
under
anaerobic
or
anoxic
conditions.
Here,
we
propose
a
novel
strategy
that
uses
inexpensive,
dual-function
elemental
sulfur
(S
Water,
Journal Year:
2023,
Volume and Issue:
15(3), P. 540 - 540
Published: Jan. 29, 2023
Polluted
aquifers
can
be
decontaminated
using
either
ZVI
(zero
valent
iron)
permeable
reactive
barriers
(PRB)
or
injected
ZVI.
The
placement
of
within
the
aquifer
may
take
several
decades
to
remediate
contaminant
plume.
Remediation
is
further
complicated
by
acting
as
an
adsorbent
remove
some
pollutants,
while
for
other
it
acts
a
remediation
catalyst.
This
study
investigates
alternative
decontamination
approach
PRB
construction
n-Fe0
injection.
reconstructs
potentiometric
surface
containing
contaminant.
reconstruction
confines
plume
stationary,
doughnut
shaped
hydrodynamic
mound.
Contaminated
water
from
mound
abstracted,
decontaminated,
and
then
reinjected,
until
all
confined
decontaminated.
At
this
point,
allowed
dissipate
into
surrounding
aquifer.
evaluated
potential
use
in
treating
following:
(i)
immiscible
liquid
plumes;
(ii)
miscible
ionic
solute
(iii)
naturally
contaminated
soils;
(iv)
salinized
soils.
results
indicate
that
approach,
when
compared
with
injection
accelerate
decontamination,
reducing
overall
amount
required.
Frontiers in Microbiology,
Journal Year:
2023,
Volume and Issue:
14
Published: Sept. 4, 2023
It
is
widely
acknowledged
that
conventional
mining
and
extraction
techniques
have
left
many
parts
of
the
world
with
depleting
coal
reserves.
A
sustainable
method
for
improving
recovery
natural
gas
from
coalbeds
involves
enhancing
production
biogenic
methane
in
mines.
By
taking
a
culture-independent
approach,
diversity
microbial
community
present
formation
water
an
Indian
reservoir
was
examined
using
16S
rRNA
gene
amplification
order
to
study
potential
microbial-enhanced
bed
(CBM)
deep
thermogenic
wells
at
depth
800-1200
m.
Physicochemical
characterization
samples
performed
aim
understanding
situ
conditions
are
most
favorable
CBM
production.
Microbial
analysis
showed
bacteria
were
more
abundant
than
archaea.
Proteobacteria,
Firmicutes,
Bacteroidetes
found
as
prevalent
phyla
all
samples.
These
play
crucial
role
providing
substrate
process
methanogenesis
by
performing
fermentative,
hydrolytic,
syntrophic
functions.
Considerable
variation
abundance
genera
observed
amongst
selected
wells,
potentially
due
variable
local
geochemical
within
reservoir.
The
results
our
provide
insights
into
impact
factors
on
distribution
Further,
demonstrates
lab-scale
enhancement
through
nutrient
amendment.
also
focuses
Raniganj
coalbed
block
amplicon
sequencing
further
recognizing
stimulation.
findings
will
help
reference
better
strategization
implementation
on-site
stimulation
enhanced
future.
Minerals,
Journal Year:
2024,
Volume and Issue:
14(12), P. 1231 - 1231
Published: Dec. 3, 2024
Two
common
iron
oxide-bearing
wastes—a
drinking
water
treatment
residual
and
a
passive
mine
sludge
(MWTS)—were
utilised
with
without
modification
as
media
in
microcosm
experiments
to
treat
artificial
benzene,
toluene,
ethylbenzene,
xylene
(BTEX)-contaminated
wastewater.
In
all
cases,
the
removal
of
BTEX
was
observed
over
160-day
experiments,
benzene
being
most
recalcitrant.
The
solubilisation
observed,
which,
alongside
syntropic
relationship
between
methanogens
firmicutes,
allowed
several
anaerobic
processes
occur,
including
reduction
concert
biodegradation
BTEX.
Nitrogen
sparging
prior
establishment,
compared
aeration,
seen
lead
greater
subsequent
BTEX,
indicating
that
conditions
favoured
removal.
rates
indicated
these
wastes,
an
abundant
waste
stream,
may
be
interesting
candidate
for
cost-effective
remediation
applications
such
permeable
reactive
barriers.
