The
impact
of
the
pandemic
caused
by
COVID-19
on
urban
pollution
in
our
cities
is
a
proven
fact,
although
its
mechanisms
are
not
known
great
detail.
change
mobility
patterns
due
to
restrictions
imposed
population
during
lockdown
phenomenon
that
can
be
parameterized
and
studied
from
perspective
spatial
analysis.
This
study
proposes
an
analysis
guiding
parameters
these
changes
To
do
so,
case
city
Cartagena,
medium-sized
Spain,
has
been
analyzed
throughout
period
COVID-19.
By
means
geostatistical
analysis,
modal
distribution
transport
have
correlated
with
evolution
environmental
air
quality
indicators
city.
results
show
despite
positive
effect
beginnings
mobility,
generated
behavior
current
users
favor
most
polluting
modes
travel
cities.
Environmental and Sustainability Indicators,
Год журнала:
2023,
Номер
21, С. 100319 - 100319
Опубликована: Дек. 5, 2023
In
the
face
of
rapid
urbanization,
understanding
and
managing
changes
in
Land
Use
Cover
(LULC)
is
crucial
for
sustainability
resilience
urban
ecosystems.
Rapid
growth
resulting
from
LULC,
can
lead
to
fragmentation
degradation
Ecosystem
Services
(ES),
including
habitat
provision,
water
regulation,
air
purification.
This
study
investigates
LULC
Dhaka
City,
Bangladesh,
2010
2021
forecasts
their
future
impacts
on
ES
2030
2040.
Landsat
images
were
processed
using
Google
Earth
Engine
platform,
a
cellular
automata
technique
was
integrated
with
an
Artificial
Neural
Network
(ANN)
mapping
prediction.
Results
showed
increase
built-up
areas
31%
42%
between
2021,
projected
decrease
34%
32%
2040,
respectively.
Water
bodies,
vegetation,
agricultural
land
declined
but
are
expected
trend
indicates
growing
awareness
need
sustainable
environment
ecosystem
development.
The
value
predicted
drop
$172.66
$160.23
over
thirty
years
(2010–2040),
primarily
due
bodies
($7.64)
($6.89).
However,
by
2040
suggests
potential
recovery
enhancement
these
values
through
practices.
Future
use
policies
should
promote
agriculture
resource
management
while
fostering
against
growth.
approach
will
ensure
development
informs
strategies
supporting
natural
management,
quality
decisions,
planning.
It
underscores
importance
integrating
into
benefit
both
city's
inhabitants.
Green Technologies and Sustainability,
Год журнала:
2024,
Номер
2(2), С. 100074 - 100074
Опубликована: Янв. 21, 2024
As
of
2023,
Bangladesh
stands
as
the
seventh
most
populous
nation
globally,
confronting
challenges
arising
from
limited
resources
and
rapid
urbanization.
The
emergence
COVID-19
pandemic
has
led
to
unprecedented
disruptions
on
a
global
scale,
necessitating
detailed
examination
its
effects,
particularly
within
urban
environments.
This
study
meticulously
scrutinizes
repercussions
environment,
focusing
specifically
Dhaka
City.
In
this
comprehensive
exposition,
we
explore
multifaceted
impact
outbreak,
spanning
environmental
non-environmental
aspects
like
water
quality,
air
municipal
waste
management,
noise
pollution.
We
analyze
data
across
distinct
timeframes,
employing
Indicators,
Impact,
Strategy
(IIS)
framework
for
improvement
sustainability.
reveals
substantial
shifts
in
poised
exert
profound
influence
city’s
inhabitants
overall
ecology.
Notably,
findings
indicate
marked
attributed
partly
reduced
industrial
activity
diminished
vehicular
emissions
during
lockdowns.
However,
management
faced
significant
challenges,
resulting
deterioration
disposal
system.
Of
particular
concern
was
medical
due
increased
generation
pandemic.
concludes
by
proposing
robust
policy
addressing
key
concerns,
including
health,
pollution
control.
These
recommendations
aim
bolster
sustainable
progress
unique
exigencies
era.
grapples
with
pandemic’s
aftermath,
research
offers
valuable
insights
roadmap
ensuring
more
resilient
environmentally
future
Environmental Science & Technology,
Год журнала:
2023,
Номер
57(17), С. 6808 - 6824
Опубликована: Апрель 21, 2023
Nontarget
mass
spectrometry
has
great
potential
to
reveal
patterns
of
water
contamination
globally
through
community
science,
but
few
studies
are
conducted
in
low-income
countries,
nor
with
open-source
workflows,
and
datasets
FAIR
(Findable,
Accessible,
Interoperable,
Reusable).
Water
was
collected
from
urban
rural
rivers
around
Dhaka,
Bangladesh,
analyzed
by
liquid
chromatography
high-resolution
four
ionization
modes
(electrospray
±,
atmospheric
pressure
chemical
±)
data-independent
MS2
acquisition.
The
acquisition
strategy
complementary:
19,427
7365
features
were
unique
ESI
APCI,
respectively.
complexity
pollution
revealed
>26,000
molecular
resolved
MS-DIAL,
among
which
>20,000
correlated
sources
Dhaka.
A
major
wastewater
treatment
plant
not
a
dominant
source,
consistent
contributions
uncontrolled
drainage,
result
that
encourages
development
further
infrastructures.
Matching
deconvoluted
spectra
public
libraries
resulted
62
confident
annotations
(i.e.,
Level
1-2a)
allowed
semiquantification
42
analytes
including
pharmaceuticals,
pesticides,
personal
care
products.
In
silico
structure
prediction
for
the
top
100
unknown
associated
an
source
15
additional
chemicals
anthropogenic
origin
be
annotated
3).
authentic
uploaded
MassBank
Europe,
spectral
data
openly
shared
on
MassIVE
repository,
tool
MASST)
could
used
science
environmental
surveillance
demonstrated,
current
limitations
discussed.
Heliyon,
Год журнала:
2023,
Номер
9(1), С. e13027 - e13027
Опубликована: Янв. 1, 2023
The
scarcity
of
freshwater
in
most
the
megacities
world
is
an
important
concern.
In
this
regard,
scientifically
harvested
rainwater
could
provide
effective
measure
to
crisis.
attempt,
we
developed
a
cost-effective
sensor-based
automated
first-flush
harvesting
system
(RHS)
improve
and
economic
development
like
Dhaka,
Bangladesh.
To
investigate
performance
system,
suit
representative
samples
was
systematically
collected,
preserved,
assessed
between
months
July-December
2021
for
water
quality
parameters
such
as
physicochemical
(pH,
EC,
TDS,
DO,
hardness,
alkalinity),
anions
(F-,
Cl-,
NO2-,
NO3-,
Br-,
SO42-),
elemental
(Ca,
Mg,
Cr,
As,
Cd,
Hg,
Pb,
Be,
Ni,
Se,
Fe),
microbial
contamination
analysis.
A
Multiparameter
digital
meter
titrimetric
method
were
employed
measuring
properties
whereas
concentration
detected
using
inductively
coupled
plasma-mass
spectrometer
atomic
absorption
spectrometer.
changes
preserved
investigated
from
time
during
whole
experimental
period.
findings
showed
that
mean
pH
(6.90)
concentrations
(mg/L)
other
concerning
TDS
(15.5),
DO
(7.26),
hardness
(14.9),
Cl-
(3.59),
NO3-
(4.84),
SO42-
(4.62),
Fe
(<0.2),
Cr
(0.086
μg/L),
As
(0.224
Cd
(0.260
Hg
(0.270
Pb
(5.530
μg/L)
below
WHO
drinking
guidelines
literature
data
implying
derived
RHS
completely
safe
uses
even
respect
(total
bacterial
counts:
0-15
CFU/mL,
total
fecal
coliform
less
than
1.8
MPN/100
mL)
long
storage.
Hence,
technology
has
huge
opportunity
mitigate
groundwater
depletion
issues,
especially
Arabian Journal of Chemistry,
Год журнала:
2023,
Номер
16(6), С. 104767 - 104767
Опубликована: Март 4, 2023
The
magnetic
Fe3O4-HKUST-1
nanocomposites
were
synthesized
using
a
simple
and
green
hydrothermal
technique,
utilizing
Fe3O4
the
chemically
stable
metal–organic
framework
HKUST-1.
with
varied
proportion
of
subjected
to
advanced
characterization,
which
included
XRD,
IR,
BET,
TG,
SEM,
TEM,
EDS,
VSM.
nanocomposite
0.4
(FH4)
had
rough
surface
spherical
morphology
good
micro
mesopores.
mean
pore
size
2.58
nm,
volume
0.35
cm3/g,
having
excellent
saturation
performance
(26.39
emu/g).
adsorption
isotherm
kinetics
on
azo
dye
neutral
red
(NR)
wastewater
assessed
in
detail.
In
contrast
Freundlich
model,
Langmuir
model
better
described
isotherms,
while
pseudo-second-order
kinetic
captured
kinetics.
FH4
was
most
effective
adsorbent
highest
capacity
for
NR
separation.
