Geography and sustainability,
Journal Year:
2023,
Volume and Issue:
4(4), P. 379 - 390
Published: Sept. 21, 2023
Inappropriate
management
of
municipal
solid
waste
dumpsites
is
a
major
cause
groundwater
contamination
in
developing
countries,
but
the
extent
problem
not
known.
This
study
investigated
quality
vicinity
Olusosun
dumpsite
Lagos,
Nigeria,
most
populous
city
sub-Saharan
Africa.
During
2020,
monthly
samples
were
collected
17
wells
and
boreholes
used
as
drinking
water
sources,
analysed
for
20
physico-chemical
parameters.
Differences
between
sites
seasons
statistically
assessed,
together
with
changes
index
(WQI).
The
results
indicated
that
heavy
metals
(Pb2+,
Ni+,
Mn2+,
Fe2+,
Cr6+),
cations
(Ca2+,
Mg2+,
K+),
total
hardness
pH
main
parameters
impairing
quality.
Drinking
standards
from
both
World
Health
Organization
Nigeria
government
exceeded
more
often
wet
than
dry
season.
Some
properties
negatively
correlated
distance
to
(e.g.,
Fe,
Pb2+,
NO3−).
Significant
differences
identified,
no
clear
spatial
trend.
WQI
varied
excellent
(6%–24%
over
period)
unsuitable
purposes
(12%–18%),
good
prevailing
at
(35%–47%).
Although
declined
24%
during
improvements
compared
previous
decades.
Remediation
strategies
must
be
implemented
safeguard
public
health
sustainability
resources.
Nitrate
groundwater
contamination
poses
significant
health
risks,
especially
in
infants
and
pregnant
women.
Therefore,
effective
aqueous
nitrate
removal
is
crucial.
This
study
focuses
on
using
acid
modified
biochar
derived
from
the
invasive
plant
Prosopis
juliflora
bark,
hereafter
referred
to
APBBC700
used
for
all
studies.
was
characterized
Fourier-transform
infrared
spectroscopy
(FTIR)
identify
surface
functional
groups,
scanning
electron
microscopy
(SEM)
morphology,
transmission
(TEM)
size
shape.
The
Brunauer,
Emmett,
Teller
area
(SBET)
of
20.8
m2/g
compared
14.5
raw
(PBBC700).
Fixed
bed
sorption
studies
were
carried
out
at
depths
7,
14,
21
cm,
flow
rates
3,
5,
7
mL/min,
10,
20,
30
mg/L
NO3-N.
Column
breakthrough
data
fitted
Thomas,
Yoon-Nelson,
Adam-Bohart,
Wolborska,
bed-depth-service-time
(BDST)
models.
BDST
models
best
fit
fixed-bed
(R2
=
0.74
0.98).
A
maximum
adsorption
capacity
8.51
mg/g
obtained
a
rate
3
cm
depth,
regeneration
0.5
N
NaCl.
Adsorption
capacities
7.72,
6.73,
5.81,
5.69,
5.31,
5.3,
4.21,
2.0
0th,
1st,
2nd,
3rd,
4th,
5th,
6th,
7th
cycles,
respectively.
even
presence
coexisting
anions.
Twenty-four
samples
Delhi
NCR
Haryana
collected,
with
12
exceeding
BIS
limit
45
(10.2
NO3-N),
which
successfully
treated
meet
permissible
level.
model's
prediction
times
varying
aids
designing
large-scale
filtration
systems
removal.
preparation
cost
estimated
be
∼US$
6.87
per
kg.
Using
production
supports
achieving
Sustainable
Development
Goal
(SDG)
6
(Clean
Water
Sanitation).
Journal of Applied Biology & Biotechnology,
Journal Year:
2022,
Volume and Issue:
unknown, P. 6 - 24
Published: June 20, 2022
Isolation
and
identification
of
pathogenic
microbes
from
tomato
puree
their
delineation
distinctness
by
molecular
techniquesR.K.
Garg,
N.
Batav,
Silawat,
R.K.
Singh
Molecules,
Journal Year:
2023,
Volume and Issue:
28(22), P. 7515 - 7515
Published: Nov. 10, 2023
The
nitrate
ion
(NO3-)
is
a
typical
pollutant
in
environmental
samples,
posing
threat
to
the
aquatic
ecosystem
and
human
health.
Therefore,
rapid
accurate
detection
of
NO3-
crucial
for
both
sciences
government
regulations.
Here
we
report
fabrication
an
amino-functionalized,
vertically
ordered
mesoporous
silica
film
(NH2-VMSF)
confining
localized
copper
nanoparticles
(CuNPs)
electrochemical
NO3-.
NH2-VMSF-carrying
amino
groups
possess
perpendicular
nanochannel
structure
ultrasmall
nanopores,
enabling
confined
growth
CuNPs
through
electrodeposition
method.
resulting
CuNPs/NH2-VMSF-modified
indium
tin
oxide
(ITO)
electrode
(CuNPs/NH2-VMSF/ITO)
combines
electrocatalytic
reduction
ability
electrostatic
attraction
capacity
NH2-VMSF
towards
Thus,
it
sensitive
method
determination
with
wide
linear
range
5.0-1000
μM
low
limit
2.3
μM.
Direct
water
samples
(tap
water,
lake
seawater,
rainwater)
acceptable
recoveries
ranging
from
97.8%
109%
was
performed,
demonstrating
that
proposed
CuNPs/NH2-VMSF/ITO
sensor
has
excellent
reproducibility,
regeneration,
anti-interference
abilities.
