Case Studies in Chemical and Environmental Engineering,
Год журнала:
2024,
Номер
10, С. 100878 - 100878
Опубликована: Авг. 3, 2024
This
study
presents
a
successful
synthesis
of
natural
magnetic
silica
(NMM@SiO2)
materials
modified
with
hydrophobic
groups
for
the
adsorption
two
antibiotics,
chloramphenicol
(CAP)
and
ciprofloxacin
(CIP).
The
NMM@SiO2
was
prepared
using
material
(NMM)
isolated
from
iron
sand,
extracted
quart
methyltrimethoxysilane
(MTMS)
as
precursor.
synthesized
were
characterized
various
analytical
techniques,
including
FTIR,
XRD,
VSM,
TGA,
TEM,
SEM-EDX-Mapping.
Subsequently,
used
to
adsorb
antibiotics
an
aqueous
solution
batch
system,
antibiotic
concentration
in
measured
UV-VIS
spectrophotometry.
characterization
results
confirmed
incorporation
MTMS
onto
NMM@SiO2.
studies
indicated
that
optimum
pH
CAP
CIP
5
6,
respectively,
contact
time
being
120
min
90
CIP,
initial
concentrations
200
mg
L−1.
(1.5
g)
0.4
g
(3.0
mmol)
obtain
NMM@SiO2/C1(3)
exhibit
highest
capacities
both
(58.46
g−1
106.81
CIP).
For
tested,
kinetics
isotherms
followed
pseudo-second-order
Freundlich
models,
respectively.
thermodynamic
negative
ΔH
(exothermic),
positive
ΔS
(increase
randomness),
ΔG
(spontaneous)
CIP.
These
highlight
performance
this
hydrophobic-based
adsorbent
demonstrate
its
potential
effective
aquatic
environments.
Frontiers in Ecology and Evolution,
Год журнала:
2024,
Номер
12
Опубликована: Апрель 3, 2024
Wetlands
are
badly
damaged
in
many
parts
of
the
world.
The
wetland
management
Minjiang
Estuary
has
achieved
remarkable
results.
This
provides
valuable
experience
for
other
areas.
can
achieve
effect,
mainly
because
adoption
water
quality
management,
ecological
restoration,
and
tourism
development.
However,
different
modes
have
their
own
scope
application.
In
order
to
spread
its
successes,
three
differential
game
related
constructed,
equilibrium
results
compared
analyzed.
Finally,
research
shows
that
amount
control
by
governments
is
directly
proportional
resilience
wetlands.
social
organization
culture
degree
better
quality.
development
government
organizations
decrease
investment
spontaneous
industry.
When
loss
caused
flood
or
restoration
effect
large,
should
adopt
mode.
increased
income
reputation
ecotourism
mode
be
adopted.
a
reference
how
manage
wetlands
promote
areas
more
effectively.
Frontiers in Microbiology,
Год журнала:
2024,
Номер
15
Опубликована: Июнь 6, 2024
Given
the
increasing
pressure
on
water
bodies,
it
is
imperative
to
explore
sustainable
methodologies
for
wastewater
treatment
and
reuse.
The
simultaneous
presence
of
multiples
contaminants
in
complex
wastewater,
such
as
liquid
effluents
from
biogas
plants,
can
compromise
biological
effectiveness
reclaiming
water.
Vertical
subsurface
flow
constructed
wetlands
were
established
low-cost
decentralized
technologies
treat
fraction
digestate
municipal
organic
waste
with
metals,
antibiotics,
antibiotic
resistance
genes,
allow
its
reuse
irrigation.
Twelve
lab-scale
planted
assembled
gravel,
light
expanded
clay
aggregate
sand,
testing
four
different
treating
conditions
(liquid
spiked
oxytetracycline,
sulfadiazine,
or
ofloxacin,
at
100
μg/
L,
without
dosing)
during
3
months.
Physicochemical
parameters
(pH,
chemical
oxygen
demand
(COD),
nutrients,
antibiotics),
microbial
communities
dynamics
(through
16S
high-throughput
sequencing)
genes
removal
(qPCR)
monitored
influents
effluents.
Systems
removed
85.8%–96.9%
matter
(as
COD),
over
98.1%
ammonium
phosphate
ions,
69.3%–99.4%
nitrate
nitrite
no
significant
differences
between
absence
antibiotics.
Removal
Fe,
Mn,
Zn,
Cu,
Pb
Cr
exceeded
82%
all
cycles.
also
sulfadiazine
ofloxacin
99%,
decreased
intl1,
tetA,
tetW
,
sul1
qnrS
gene
copies.
Nonetheless,
after
months
dosing,
started
being
detected.
processes
relied
high
HRT
(14
days)
various
mechanisms
including
sorption,
biodegradation,
precipitation.
Microbial
community
diversity
changed
significantly
a
decrease
initial
Firmicutes
dominance,
but
clear
effect
antibiotics
structure.
Removals
above
85%
94%
observed
Streptococcus
Clostridium,
respectively.
Results
suggest
that
vertical
suitable
technology
irrigation
agricultural
systems,
contributing
circular
bioeconomy
concept.
However,
more
profound
understanding
effective
strategies
needed
avoid
dissemination.
