River,
Journal Year:
2024,
Volume and Issue:
3(4), P. 408 - 415
Published: Nov. 1, 2024
Abstract
The
Kolong,
a
significant
distributary
of
the
mighty
river
Brahmaputra
in
Assam,
India,
has
experienced
human‐induced
alterations
aimed
basically
for
flood
mitigation.
This
study
investigates
socio‐ecological
impacts
course
change
Kolong
River
done
by
local
people
Kahargaon
village
Nagaon
district
India.
Employing
mixed‐methods
approach,
research
integrates
field
observations,
stakeholder
interviews,
community
forums,
and
secondary
data
analysis
to
assess
river's
dynamics
its
effects
on
livelihoods
ecosystems.
findings
reveal
that
while
mitigation
efforts
have
provided
immediate
relief,
they
also
led
ecological
degradation
disrupted
traditional
livelihoods,
particularly
those
dependent
natural
flow.
left‐out
channel,
once
rich
biodiversity,
now
suffers
from
reduced
water
levels
diminished
riverine
niche,
compelling
communities
adapt
through
alternative
agricultural
practices
grazing.
emphasizes
need
integrated
management
strategies
balance
control
with
preservation
livelihood
sustainability.
Thus,
promotes
community‐based
conservation
initiatives,
restoring
flow
patterns,
developing
adaptive
strategies.
insights
gained
so
far
contribute
broader
understanding
human–river
interactions
offer
valuable
lessons
sustainable
similar
contexts
globally.
Environmental Science & Technology,
Journal Year:
2023,
Volume and Issue:
57(23), P. 8628 - 8637
Published: May 31, 2023
Reactive
oxygen
species
(ROS)
play
key
roles
in
driving
biogeochemical
processes.
Recent
studies
have
revealed
nonphotochemical
electron
transfer
from
redox-active
substances
(e.g.,
iron
minerals)
to
as
a
new
route
for
ROS
production.
Yet,
naturally
occurring
minerals
mainly
exist
thermodynamically
stable
forms,
restraining
their
potential
Here,
we
report
that
tide-induced
redox
oscillations
can
activate
enhanced
•OH
production
intertidal
soils
(15.8
±
0.5
μmol/m2)
was
found
be
5.9-fold
more
efficient
than
those
supratidal
soils.
Moreover,
incubation
of
under
tidal
fluctuations
dramatically
by
4.3-fold.
The
hydrology
triggered
alternation
between
biotic
reduction
and
abiotic
oxidation
could
accelerate
the
reactive
ferrous
ions
amorphous
ferric
oxyhydroxides,
making
into
metastable
phases
(RAMPs)
with
reduced
crystallinity
promoting
surface
electrochemical
activities.
Those
RAMPs
displayed
activity
Investigations
nationwide
coastal
verified
ubiquitously
Our
study
demonstrates
effective
formation
hydrological
perturbations,
which
provides
insights
natural
sources.
Environmental Science & Technology,
Journal Year:
2024,
Volume and Issue:
58(5), P. 2185 - 2203
Published: Jan. 18, 2024
The
groundwater
table
fluctuation
(GTF)
zone
is
an
important
medium
for
the
hydrologic
cycle
between
unsaturated
soil
and
saturated
aquifers,
which
accelerates
migration,
transformation,
redistribution
of
contaminants
further
poses
a
potential
environmental
risk
to
humans.
In
this
review,
we
clarify
key
processes
in
generation
GTF
examine
its
links
with
variation
hydrodynamic
hydrochemistry
field,
colloid
mobilization,
contaminant
migration
transformation.
Driven
by
recharge
discharge,
regulates
water
flow
movement
capillary
fringe,
control
advection
dispersion
groundwater.
addition,
formation
reactive
oxygen
species
(ROS)
waterfall
are
impacted
GTF.
changing
ROS
components
partially
determine
characteristic
transformation
solutes
dynamic
microbial
population.
facilitates
(such
as
nitrogen,
heavy
metals,
non-aqueous
phase
liquids,
volatile
organic
compounds)
through
co-migration
effect,
fields.
conclusion,
review
illustrates
limitations
current
literature
on
GTF,
significance
zones
underground
environment
underscored
expounding
future
directions
prospects.
Water,
Journal Year:
2024,
Volume and Issue:
16(3), P. 478 - 478
Published: Jan. 31, 2024
The
presence
of
high
concentrations
geogenic
arsenic
(As)
in
groundwater
poses
a
serious
threat
to
the
health
millions
individuals
globally.
This
paper
examines
research
progress
with
As
through
comprehensive
literature
review
and
analysis,
covering
distribution,
risks,
situ
remediation,
regulatory
technologies,
development
trends,
establish
reference
for
future
research.
global
distribution
high-As
is
mainly
inland
basins
river
deltas
countries
South
Asia,
East
America.
High-As
risk
areas
can
be
modeled
using
hydrogeologic
data
field
measurements.
modeling
approach
allows
assessing
measuring
potential
groundwater.
In
order
provide
safe
drinking
water
promptly
effectively
affected
by
groundwater,
rapid
detection
remediation
techniques
have
been
given
significant
attention.
introduces
household-
or
community-scale
removal
including
flocculant–disinfectant,
bucket
treatment
units,
use
activated
alumina,
nano
zero-valent
iron,
aquifer
iron
coating
technology,
bioremediation,
summarizing
basic
mechanisms
each
technology.
Guaranteeing
sustainability
site-scale
reasonable
management,
exploring
alternative
sources
are
crucial
combating
contamination.
Future
studies
should
aim
elucidate
As’s
coexistence
other
pollutants
treating
As-containing
wastes
sludge
produced
during
process
better
options.
ACS Sustainable Chemistry & Engineering,
Journal Year:
2024,
Volume and Issue:
12(7), P. 2900 - 2910
Published: Feb. 7, 2024
With
the
continuous
exploitation
of
arsenic-containing
resources
and
growing
concern
over
arsenic
contamination,
disposal
has
become
a
global
challenge.
Elemental
arsenic,
because
its
nontoxic
nature,
is
considered
preferred
form
for
detoxification
mitigation.
We
introduce
an
innovative
eco-friendly
method
to
convert
highly
toxic
trioxide
into
nonpoisonous
elemental
via
mechanochemical
processing
at
room
temperature.
Utilizing
zinc
powder
as
reductant
acetic
acid
reaction
medium,
we
achieved
remarkable
reduction
efficiency
92.5%,
producing
approximately
99%
purity.
Thermodynamic
analysis
revealed
pivotal
role
in
stabilizing
system
eliminating
formation
arsine.
Density
functional
theory
calculations
further
confirmed
that
H3AsO3
on
surface
was
dominant
Zn–CH3COOH–As2O3
system.
The
introduction
mechanical
force
lowered
relative
energy
reaction,
resulting
superior
performance
under
relatively
mild
conditions.
These
findings
could
pave
way
safe
waste
offer
sustainable
route
reducing
toxicity
trioxide.
