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1031
EFFICIENT DYE REMOVAL BY NANO COMPOSITE HYDROGELS THROUGH A
FENTON-LIKE REACTION
Shirpacha Khapulwak
Email address:
Shirpachakhpalwak1398@gmail.com
Department of Chemistry, Farah University, Farah, Afghanistan.
Muslim Halimi
Email address:
Department of Chemistry, Farah University, Farah, Afghanistan.
Haseebullah Ayazi
Department of Chemistry, Farah University, Farah, Afghanistan.
https://doi.org/10.5281/zenodo.15245157
Abstract. This study investigates the utilization of nano-composite hydrogels for the
removal of methyl violet from aqueous solutions, leveraging a Fenton-like reaction mechanism.
The
nano-composite hydrogel demonstrated exceptional efficiency in dye removal,
attributed to the synergistic effects of the hydrogel matrix and the catalytic activity of embedded
nano-particles. This process generates hydroxyl radicals under mild conditions, leading
to the effective breakdown of various industrial dyes. The kinetics of dye removal, the reusability
of the nano-composite, and the influence of operational parameters such as different amounts of
nano-composite, pH,
, temperature, and dye concentration were systematically
explored. The findings underscore the potential of
nano-composite hydrogel as a
promising, environmentally friendly solution for wastewater treatment and dye removal.
Keywords: methyl violet, nano-composite,
nano-particles.
ЭФФЕКТИВНОЕ УДАЛЕНИЕ КРАСИТЕЛЯ НАНОКОМПОЗИТНЫМИ
ГИДРОГЕЛЯМИ С ПОМОЩЬЮ РЕАКЦИИ ФЕНТОНА
Аннотация. В этом исследовании изучается использование нанокомпозитных
гидрогелей для удаления метилового фиолетового из водных растворов с использованием
механизма реакции Фентона. Нанокомпозитный гидрогель продемонстрировал
исключительную
эффективность
в
удалении
красителя,
что
объясняется
синергетическим эффектом матрицы гидрогеля и каталитической активностью
внедренных наночастиц. Этот процесс генерирует гидроксильные радикалы в мягких
условиях, что приводит к эффективному расщеплению различных промышленных
красителей. Были систематически исследованы кинетика удаления красителя,
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возможность повторного использования нанокомпозита и влияние рабочих параметров,
таких как различные количества нанокомпозита, pH, температура и концентрация
красителя. Результаты подчеркивают потенциал нанокомпозитного гидрогеля как
многообещающего, экологически чистого решения для очистки сточных вод и удаления
красителя.
Ключевые слова: метиловый фиолетовый, нанокомпозит, наночастицы.
Introduction
The synthesized composite is capable of easy and fast separation from aqueous
environments along with contaminants absorbed in an external magnetic field.[1] The strong
composite hydrogels can be expected to widen the practical applications for pollutant removal
from wastewater.[2] Desorption of dyes from the dye loaded nano-composite hydrogel was
simply done in ethanol. The results indicate that the prepared magnetic nano-composite hydrogel
is an efficient adsorbent with high adsorption capacity for the aforementioned dyes.[3] Dyes can
be classified into several groups such as acid, basic, direct, and reactive in the dyeing, printing,
sizing, and other industries, 280,000 tons of all kinds of dyes is discharged together with large
volumes of wastewater. All these effluents are major waste products creating environmental
pollution [3,4] Fenton process has been widely used to degrade various pollutants that directly or
indirectly affect the water quality, and the introduction of metal oxide as a heterogeneous
catalyst effectively enhances the degradation process.[4] Dye removal from wastewater is of
prominence due to its hostile effects on human health and the environment.[5] The complex
structure of the dye molecule is responsible for its difficulty in removal,[6] Currently, colors are
frequently used in virtually all manufacturing sectors and as a matter of fact are inseparable
elements of human daily life. Even though the importance of dyes/colors to civilization is
evident, the dye-polluted waters from the textile and allied industries are becoming a major
source of environmental contaminations.[1–3] Untreated effluents from these industries make the
water bodies become colored and specifically distort the natural growth activity of aquatic life by
blocking sunlight and stopping the re-oxygenation capacity of water.[3–5] The HC assisted
hydrogel nanocomposite adsorption shows the decolorization of 65 % at the optimized operating
conditions such as, pH 7.62, 0.5g clay loaded nanocomposite hydrogel, and 25g of hydrogels
loading in adsorption column.[7]
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The development of new heterogeneous catalysts with stable catalytic activity in a wide
pH range to prevent polluting precipitation plays a vital role in large-scale wastewater
treatment.[8] Catalyst to be a suitable candidate for the removal of pollutants in wastewaters by
means of the Fenton heterogeneous reaction.[9] Montmorillonite cooperated with acrylamide and
acrylic acid via polymerization, hydrogen-bond, amidation and electrostatic interactions to form
the three-dimensional reticular-structured hydrogel with the free entrance for macromolecules.[9]
Transition metal and nanocarbon-based composites with high activity and stability draw
great attention in electro-Fenton system for organic pollutants removal.[10] The dye-water
treatment using UF membrane is still a challenge. In the present study, the optimized PAN-ETA
ultrafiltration membrane was hydrolyzed and subsequently characterized by SEM, IR, CA, XPS,
NMR, mechanic measurement, etc.[11] Fenton technology has been proven an effective way to
remove dyes from wastewater a potential hydrogel based on sodium alginate integrated with poly
ethyleneimine (PEI) was fabricated and employed for the elimination of methyl blue in aqueous
media. The SA/PEI hydrogel demonstrated excellent removal performance for methyl blue, i.e.
~99% of methyl blue could be removed from water within ~30 min using 0.5 g/L SA/PEI
hydrogel at 100 mg/L initial concentration. [12] The nanocomposite used is a cross linked
network of acrylic acid synthesized inside poly(acrylamide) grafted Guggul
gum in the presence
of UV-visible respondent bismuth ferrite nanoparticles.[13] A new nanocomposite of
kaolin/copper iron oxide (
) was synthesized and its characteristics were determined
using various analyzes such as FTIR, SEM, XRD, BET, VSM, and EDX/Mapping. According to
the results, the specific surface areas of kaolin and kaolin/
composite were obtained as
10.023 and 174.78m2/g, respectively, which indicated a significant specific surface area for
kaolin/
nanocomposite.[14] The magnetic
composite is an effective photo-
Fenton catalyst for the degradation of organics in aqueous solution.[15] The as-prepared MIL-
88A exhibited excellent photo-Fenton catalytic performance towards rhodamine B and bisphenol
A removal under visible light irradiation (LED).[16] Magnetic Chitosan/
nanocomposite was prepared and used as an adsorbent to remove acid fuchsin dye from aqueous
solution.[17] MMGO nanocomposite is a facile and a promising adsorbent for removing of
cationic and anionic dyes from textile and other wastewater by a little change in pH value[18]
Cellulose/graphene oxide/
composites were prepared by coprecipitating iron salts onto
cellulose/GO hydrogels in a basic solution.[19] graphene oxide, fluorinated graphene oxide and
interconnected reduced graphene oxide were synthesized and systemically investigated for the
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removal of two cationic dyes, methylene blue and rhodamine B, from aqueous solution[20]
Octahedral and spherical
nanoparticles were synthesized and used as heterogeneous
Fenton-like catalysts to degrade methylene blue.[21] Beta-cyclo dextrin-based composite fibers
have demonstrated potential large-scale applications in dye uptake and wastewater treatment.[22]
Provides a green pathway to the fabrication of a stable nanocomposite catalyst with high
catalytic performance and reusability for the degradation of organic pollutants[23] The outcomes
demonstrate that silver nanoparticles with uniform sizes were homogenously distributed through
DAA/Ge hydrogel.[24] The nanocomposites exhibited a photo-Fenton catalytic feature for the
degradation of Maxilon C.I. basicdye in aqueous medium using sunlight.[25] The FTIR profile at
relevant wavenumbers detected intercalation of aluminum and incorporation of iron.[26] The
efficiency of Fenton and Fenton-like processes can be seriously affected by the continuous loss
of iron ions and by the formation of solid sludge.[27] In situproduction of Fenton’s reagent
through bioelectrochemical technology (bioelectro-Fenton) is emergingas a possible strategy to
reduce the cost associated with Fenton’s reagent.[28] α-
was used as a candidate
cathode material for treatment of organic wastewater by EF system.[29] Hydrogel-based
magnetic nanocomposites loaded with anisotropic
nano crystals including nanooctahedra,
nanorods, and nanoneedles were prepared by synthesizing in situ
nanostructures in the
matrix of an anionic PNaAMPS hydrogel.
anisotropic nanostructures that exhibit excellent
catalytic performance are rarely used to catalyze Fenton-like reactions because of the inevitable
drawbacks resulting from traditional preparation methods[30] magnetic Cu-Fe oxide(CuFeO)
was developed as the heterogeneous photo-Fenton catalyst through a facile two-step method.[31]
A magnetic composite material composed of nano-magnetite, heulandite, and cross-
linked chitosan was prepared and used as an adsorbent for methylene blue and methyl
orange.[32] A magnetite-loaded mesocellular carbonaceous material,
,
exhibited superior activity as both a Fenton catalyst and an adsorbent for removal of phenol and
arsenic, and strong magnetic property rendering it separable by simply applying magnetic
field.[33]
–chitin hybrid was used for the effective removal of methylene blue from liquid
solution asmodel for wastewater treatment.[34] Scientists are constantly engaged in finding the
advanced technology with high proficiency and low investment.[35] the advanced technology
with high proficiency and low investment.[36] The synthesis of porous gelatin/AcA (PGE-AcA)
hydrogel and novel porous gelatin-silver/AcA (NPGESNC-AcA) nanocomposite hydrogel, and
their ability as effective biosorbents for the removal of
ions from contaminated water.[37]
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The hydrogel is made up of
nanoparticles, reduced graphene oxide and polyacrylamide,
which is prepared by a two-step chemical synthetic method, and exhibits the outstanding
mechanical strength, Photo-Fenton activity, adsorptive property and reversibility.[38] Fenton
catalytic oxidation is an efficient and green method to remove pollutants, and the preparation of
Fenton catalyst by MOF is a significant task.[39] Oxidation by Fenton-like reactions is proven
and economically feasible process for destruction of a variety of hazardous pollutants in
wastewater.[40] Magnetic iron particles doped with
were synthetized to be used as a photo
electro Fenton catalyst, being easily eliminated from the treated solution
.
[41] Fe-rich biochar
with multivalent iron compounds (Fe 0, Fe 0.95 C 0.05,
, and
) pyrolyzed from
sludge cake conditioned with Fenton's reagent and red mud was utilized as an efficient Fenton
catalyst for the degradation of 4-chlorophenol(4-CP).[42] Silver nanoparticles decorated reduced
graphene oxide is a well-established nanoparticle for multifunctional applications.[43] Fe-
supported bentonite (Fe-B) was successfully fabricated as a low-cost heterogeneous catalyst
foradsorption and visible light photo-Fenton degradation of rhodamine B from aqueous
solution.[44]
Experimental section
2-1-
Materials:
Carboxymethylcellulose,
N,N-methylenebisacrylamide,
ammoniumpersulfate, acrylic acid, sodiumhydroxide, ethanol(96%),
were doctor
Majalali chemical complex, Iran.
,
, thioacetamide (
),
methylviolet (
were Merck, and water.
2-2- Instruments: For dye removal measurement quantity UV (Camspec M350 Double
Beam model, England), for functional group identification FTIR (AVATAR model made in
Thermo company, America), for thermal stability used TGA (model Perkin Elmer Pyris
Diamond TGA/DTA, America), for elements present in the nano-composite hydrogel EDX used,
for checking morphology surface SEM (microscopy MIRA III model TESCAN company Czech
Republic), for presence of nano-particles in the hydrogel tissue XRD (PW1730 model, PHILIPS
company Netherland), for identify the elements XRF (
model, PHILIPS company
Netherland) used, for specification measurement nanoparticles TEM (Zeiss EM10C model whit
80 kV accelerated voltage USA), for porosity amount measurement and representative BET
(BELSORP MINI II model BEL Company Japan) and for functional group Raman (P50C0R10
model Teksan company) used.
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2-3- Preparation of hydrogel: 1g carb oxy methyl cellulose in 40 mL water, 0.1 g N, N-
methylene bis acrylamide in 5 mL water, 0.1 g ammonium per sulfate in 5 mL water and 0.7g
NaOH in 6 mL water, were dissolved. Next step, carb oxy methyl cellulose solution in the water
bath (
) and 150 rmp, and N, N-methylene bis acrylamide, 4 mL acrylic acid, 1 mL NaOH
(0.1M), ammonium per sulfate were added for 45 min to obtain a hydrogel. The formed hydrogel
in ethanol for 12 h and in oven at
for 12 h.
2-3- Preparation of the Nanocomposite: 0.1 g carb oxy methyl cellulose in 150 mL water
for 3h fully swelling. 0.3g
and 0.3g
in 15 mL water in this solution
added hydrogel for 10 min and washed with water. 0.4g thioacetamide in 15 mL water after
added hydrogel to a few min and 1mL NaOH 0.1M. Formed nano-composite in ethyl alcohol for
12h and in oven at
for 12h.
2-4- Swelling studies: 0.1g hydrogel and 0.1g nano-composite in 250 mL water for each
one, at different times they are swelling.
(Fig 1) Swellings of hydrogel (a) and nano-composite (b)
2-5- Dye removal study: For compare the removal of methylviolet, need to make five
solution of methylviolet with concentration of 10 mg/L it will be prepared 50 mL solution of
methyl violet.
For compare the removal five solutions of methyl violet, with concentration of 10mg/L
and 50mL were prepared. 0.07g of hydrogel with 40-60 mesh in two solutions, 0.07g of nano-
composite with 40-60 mesh in the other two solutions and 2mL of H
2
O
2
in the other solution.
The equilibrium removal time of the sub-filter dye solution was evaluated by UV-Vis at 582nm.
2-6- Radical formation study: For production of hydroxyl radical, 20 mL of 2H-1-
Benzopyran-2-one with concentration 100μM and 0.028g of hydrogel and 0.8mL of H
2
O
2
were
added for 30min using magnetic stirrer. Another 20mL of 2H-1-Benzopyran-2-one with
concentration 100μM and 0.028g of nano-composite and 0.8mL of H
2
O
2
were added for 30min
using magnetic stirrer.
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Results and discussions
3-1- Synthesis and Characterization: Swelled of hydrogel by water and then added it to
and
solution, which will load divalent and trivalent iron ions in
hydrogel, added hydrogel to the thioacetmaide solution. Nano-particales of
are formed in
the hydrogel bed. (Fig 2).
(Fig 2) nano-composite including
nanoparticles
3-1-1- Thermal Gravimetric Analysis (TGA): (Fig 3) TGA of (a), (b) and (c). Stability of
(c) structure compared to (b) and (a), presence of
nano-particles. Stability of (b) structure
compared to (a), presence of poly acrylic acid and network formation.
(Fig 3) TGA chart of carb oxy methyl cellulose (a), hydrogel (b) and nano-composite (c)
3-1-2- Energy Dispersive X-ray spectroscopy: Fe and S particles in the nano-composite
(Fig 5).
S K
S K
FeK
FeK
FeL
keV
0
50
100
150
200
250
300
350
400
0
5
10
15
20
(Fig 5) Elements in nano-composite by EDX
(Fig 6) Presence Fe and S elements and
nano-particles in the hydrogel.
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(Fig 6) elements entity in nano-composite by electron microscopy
3-1-3- Scanning Electron Microscopy (SEM): Holes and empty sites in the hydrogel
(a), (b), occupied by
nano-particles (c), (d), (fig 7).
(Fig 7) SEM image of hydrogel with 20000 nm (a), nano-composite with 20000 nm (b)
3-1-4- Fourier Transform Infrared spectroscopy (FTIR): Spectrum (a) related to the
nano-composite, absorption in the area of
indicates the alcoholic OH group.
Absorption in the
area shows the presence of
group. Spectrum (b) related to
the hydrogel, absorption in the area of
indicates the hydroxyl group and
absorption in the
area is attributed to the CH stretching vibration. Area
represents the grafting of acrylic acid on the polysaccharide. Spectrum (c) related
to the carb oxy methylcellulose, absorption in the
area attributed to the OH
stretching vibration and absorption in the
area is attributed to the CH stretching
vibration.
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(Fig 8) FTIR of nano-composite (a), hydrogel (b) and carb oxy methyl cellulose (c)
3-1-5- X-ray fluorescence spectroscopy (XRF): 25.753 % Of iron with oxidation
number (+3). Sulfur oxidation number (-2), which indicates the successful synthesis of
nano-particales in the hydrogel bed.
3-1-6- Transmission Electron Microscopy (TEM): (Fig 10) TEM images of nano-
composite in the different sizes.
(Fig 10) TEM images of nano-composite at 100 and 150 nm
3-1-7- Brunauer Emmett Teller (BET): At the beginning of the isothermal curve of
nitrogen absorption by nano-composite, which corresponds to a small relative pressure of (p/p
0
=
0-0.4), the pores are saturated with nitrogen gas. The more this part is in the prepared sample, it
indicates the number of micro-holes in the nano-composite. When the relative pressure of the gas
is (p/p0 = 0.3-0.5), the surface of the cavities are covered with multi-layer of nitrogen gas
molecules. With a further increase in the relative pressure of gas (p/p0 > 0.5), the saturation of
nano-composite cavities by nitrogen gas begins (Fig 11).
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N
2
adsorption/desorption isotherm and pore size distribution of nano-composite (Fig 11)
Physical characteristics such as the total volume of holes, average diameter of holes and
volume of absorbed gas to produce a layer on the surface of nano-composite are listed in (Table
1). In addition to measuring these physical properties, this test shows the amount of empty
spaces in the nano-composite. Table 1 Physical properties of nano-composite
sample
Volume of adsorbed gas
for a layer on the surface
Mean pore diameter
Total
pore
volume(p/p0=0.990)
nanocomposite 2.4101 cm
3
g
-1
7.9391 nm
0.0035728 cm
3
g
-1
3-1-8- Raman spectroscopy (RS): The spectra related to hydrogel (a) peak 1446.489
related to CH
2
, peak 2936.579 is related to stretch CH. The spectra related to nano-composite (b)
peak 1094.036 is related to COH, peak 1226.933 is related to COC, peak 1472.854 is related to
CH
2
, peak 2928.251 is related to stretching CH, peak 3072.119 is related to stretching OH, (Fig
12).
(Fig 12) Raman spectrum of hydrogel (a) and nano-composite (b)
3-2-Deferment dyes removal: 50mL of methyl violet, crystal violet, malachitegreen,
methyl orange and tartrazine with 10mL/g and pH=6. 2mL of
, 0.07g of nano-composite.
The removal efficiency of cationic dyes higher than anionic dyes. Which hydrogel
contains carboxylate anionic groups.
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(Fig 13) Removal (%) of methylviolet (a), crystalviolet (b), malachite green (c),
methylorange (d) and tartrazine (e)
3-2- Dye removal Mechanism: Removal (%) of methyl violet by nano-composite
different factors subordinate parable amounts is of
, nano-compostie, time, temperature,
concentration and pH.
Effect of
: (Fig 14) Removal (%) by nano-composite and
(a), only nano-
composite (b), hydrogel and
(c), only hydrogel (d), and only
(e). 0.07g of nano-
composite and hydrogel, 50mL methylviolet with 10mg/L and pH = 6, 25
o
C and 35min
Removal (%) of methyl violet by parameters (Fig 14)
3-2-1- Confirm hydroxyl radical formation: 2H-1-Benzopyran-2-one used to for measure
hydroxy radical. 4-Hydroxy-2H-1-Benzopyran-2-one product by reaction of 2H-1-Benzopyran-
2-one with hydroxyl radical. Nano-composite has increased radical production. In this process
used 0.028g of hydrogel, 20mL of 2H-1-Benzopyran-2-one with 100 μM, 0.8mL of H
2
O
2
, 25
o
C,
30 min (a) and nano-composite with the same conditions (b) (Fig 15).
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Fluorescence spectra related to 2H-1-Benzopyran-2-one solution. Hydrogel (a) and nano-
composite (b) (Fig 15)
2H-1-Benzopyran-2-one Hydroxyl radical 4-Hydroxy-2H-1-
Benzopyran-2-one
3-3- Effect of pHs: The pH increases, methylviolet removal (%) increaseing. In 3, 5, 7, 9,
11 pHs, 0.07g of nano-composite, 50mL of methylviolet with 10mg/L, 2.0mL of
, 25
o
C.
Removal (%) of methylviolet in different pHs (Fig 16)
3-4- Effect of temperatures: Temperature increases, methylviolet removal (%) increasing
because the collisions between the dye and nano-composite molecules increase. In 25, 35, 45, 55,
65
o
C, 0.07g of nano-composite, 50mL with pH=6 and 10mg/L of methylviolet, 2.0mL of
.
Removal (%) of methylviolet in different temperatures (Fig 17)
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3-5- Effect of hydrogen per oxide doses: Hydrogenperoxide increases with methylviolet
removal (%) in initials increasing after reaches a constant value. 0.05, 0.1, 0.5, 1 and 2mL of
, 0.07g of nano-composite, 50mL with pH=6 and 10mg/L of methylviolet and 25
o
C.
When 2 mL of
was used, the maximum methylviolet removal was obtained in the
shortest time.
Removal (%) of methyl violet in different doses of
(Fig 18)
3-6- Effect of nano-composite amount: Nano-composite amount by increases,
methylviolet removal (%) increasing. 0.01, 0.03, 0.05, 0.07, 0.1g of nano-composite, 50mL with
pH=6 and 10mg/L of methylviolet, 2.0mL of
and 25
o
C.
When 0.07g of nano-composite, was used, the maximum methylviolet removal (%).
Removal (%) of methyl violet by different amounts of nano-composite (Fig 19)
3-7- Effect of concentration: Concentration increases with methylviolet removal (%)
decreasing, it is possible to saturate the surface of the nano-composite, and the higher the dye
concentration, the longer the time to remove it.
In 10, 50, 100, 200, 400mg/L concentrations of methylviolet, 0.07g of nano-composite,
50mL with pH=6 of methylviolet, 2.0mL of
, 25
o
C.
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With different concentrations removal (%) of methylviolet
(Fig 20)
Repeatability:
After several uses, the nanocomposite decreases due to the lack of
complete recovery after washing with ethanol and the loss of some nano-composite, as well as
due to the lack of complete washing, the amount of removal methylviolet. 0.07g of
nanocomposite, 50mL with pH=6 and 10mg/L of methylviolet, 2.0mL of
and 25
o
C (Fig
21).
Removal (%) of methylviolet by reusability use of nano-composite
(Fig 21)
Acknowledgement:
The article on "Efficient dye removal by
nano-composite
hydrogel through a Fenton-like reaction" presents a significant advancement in the field of water
purification, particularly in the treatment of dye-contaminated wastewater. It highlights the
development and application of
nano-composite hydrogel that leverage the Fenton-like
reaction to degrade dyes effectively. This work is acknowledged for its innovative approach in
integrating the catalytic properties of
nanoparticles with the versatile matrix of hydrogels,
thereby achieving a high efficiency in dye removal under mild conditions. The research provides
valuable insights into the kinetics of the dye degradation process, explores the effect of various
operational parameters, and demonstrates the composite's reusability, making a noteworthy
contribution to the development of sustainable and efficient wastewater treatment technologies.
The study titled "Efficient dye removal by
nano-composite hydrogels through a
Fenton-like reaction" marks a noteworthy contribution to environmental chemistry and materials
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science, particularly in advancing the methods for treating dye-contaminated water. The research
underscores the innovative use of
nano-composite hydrogel as a catalyst in Fenton-like
reaction, offering a novel and efficient approach to degrade various dyes in aqueous solutions.
The authors' exploration into the effects of operational parameters such as different
amounts of nano-composite hydrogel, pH,
, temperature, and dye concentration were on the
removal process, as well as their investigation into the composite's reusability, are commendable
for their thoroughness and depth. This work is acknowledged for its potential environmental
impact, presenting an eco-friendly solution to a pervasive pollution problem, and contributing
valuable insights to the field of water purification technology.
Conclusion
The study on "Efficient dye removal by
nano-composite Hydrogels through a
Fenton-like reaction" presents a compelling advancement in the field of environmental
remediation, particularly in the context of water purification. The introduction of
nano-
composite hydrogel as a catalyst for a Fenton-like reaction offers a highly effective and
environmentally friendly approach for the removal of various dyes in contaminated water. The
research conclusively demonstrates that hydrogel not only enhance the catalytic efficiency of the
Fenton-like process but also offer advantages in terms of reusability and operational stability
under a range of environmental conditions. The successful application of these nano-composite
hydrogel in dye removal signifies a potential leap forward in addressing the global challenge of
dye pollution in water bodies. The findings underscore the importance of nanotechnology and
material science in developing sustainable solutions for environmental protection. Future studies
could further optimize the composite material's properties and explore its applicability to a
broader spectrum of pollutants, potentially broadening its utility in water treatment technologies.
In conclusion, the efficient dye removal capabilities exhibited by
nano-composite
hydrogel through a Fenton-like reaction highlight a promising avenue for the development of
cost-effective, efficient, and green technologies for wastewater treatment, aligning with global
efforts towards environmental sustainability and pollution mitigation.
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