Study of adsorption of cationic dye on magnetic kappa-carrageenan/PVA nanocomposite hydrogels

Mahdavinia, Gholam Reza; Massoudi, Abdolhossein; Baghban, Ali; Shokri, Ebrahim

doi:10.1016/j.jece.2014.05.020

Cited by 146 publications

(54 citation statements)

References 42 publications

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“…The graft copolymers of carrageenans have been synthesized extensively and used in many applications such as drug delivery and wastewater treatment. Carrageenan based hydrogels have mainly been used in drug delivery applications, but some of carrageenan hydrogels have also been used as adsorbents for impurities from wastewater . For example, a hydrogel nanocomposite of kappa ‐carrageenan, PVA, and Fe 3 O 4 magnetic nanoparticles as used for the adsorption of cationic dyes, e.g., crystal violet, from aqueous solutions .…”

Section: Structure and Properties Of Gum Polysaccharidesmentioning

confidence: 99%

“…Carrageenan based hydrogels have mainly been used in drug delivery applications, but some of carrageenan hydrogels have also been used as adsorbents for impurities from wastewater . For example, a hydrogel nanocomposite of kappa ‐carrageenan, PVA, and Fe 3 O 4 magnetic nanoparticles as used for the adsorption of cationic dyes, e.g., crystal violet, from aqueous solutions . In another study, the carrageenan, alginate, and sodium‐montmorillonite‐based hydrogel nanocomposites were used for the adsorption of crystal violet and had a maximum adsorption capacity of 88.8 mg g −1 …”

Section: Structure and Properties Of Gum Polysaccharidesmentioning

confidence: 99%

“…In contrast, in alkaline solutions, polyacidic groups are completely dissociated, however, at the same time, the higher concentration of Na + and − OH ions leads to a decrease in π ion and degree of swelling. In addition, the presence of Na + ions shield the electrostatic repulsion between the carboxylate anions, results a significant decrease in swelling pressure (π s ) …”

Section: Stimuli‐responsive Graft Copolymersmentioning

confidence: 99%

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Recent Progress on the Design and Applications of Polysaccharide‐Based Graft Copolymer Hydrogels as Adsorbents for Wastewater Purification

Mittal

Ray

Okamoto

2016

Macro Materials & Eng

131

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Gum polysaccharides are one of the most abundant bio‐based polymers. They are generally derived from plants as exudates or from microorganisms and have diverse applications in many industries, especially in the food industries where they are used as emulsifiers and thickeners. In their natural form, gum polysaccharides have poor mechanical and physical properties; therefore, they are frequently modified with various synthetic monomers such as acrylamide and acrylic acid using graft copolymerization. Graft copolymerization is one of the most trusted and widely used synthetic methods for the modification of gum polysaccharides. Gum polysaccharides modified in this way have improved mechanical and physicochemical properties. Furthermore, gum polysaccharides contain a variety of functional groups, for example, carboxylic acid and hydroxyl groups; therefore, they have been used extensively as adsorbents for the removal of different impurities from wastewater such as toxic heavy metal cations and synthetic dyes. Here, the chemical and physical properties of gum polysaccharides, different methods of graft copolymerization, and the use of graft copolymer gum‐polysaccharide‐based hydrogels are reviewed in detail for the removal of toxic heavy metal cations and synthetic dyes from aqueous solutions.

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Section: Structure and Properties Of Gum Polysaccharidesmentioning

confidence: 99%

Section: Structure and Properties Of Gum Polysaccharidesmentioning

confidence: 99%

Section: Stimuli‐responsive Graft Copolymersmentioning

confidence: 99%

See 1 more Smart Citation

Recent Progress on the Design and Applications of Polysaccharide‐Based Graft Copolymer Hydrogels as Adsorbents for Wastewater Purification

Mittal

Ray

Okamoto

2016

Macro Materials & Eng

131

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“…Among several textile dyes, reactive dyes are being used largely for dyeing cellulosic, wool and nylon fabrics. Carrageenans based nanocomposite hydrogels as dye adsorbent has also been reported in literature [12][13][14][15]. Once, the dye contaminated wastewater disposed to large water bodies, presence of high concentration of dye in wastewater causes drastic rise in chemical oxygen demand and biological oxygen demand (COD and BOD) [8].…”

mentioning

confidence: 92%

Fabrication of carbon and sulphur-doped nanocomposites with seaweed polymer carrageenan as an efficient catalyst for rapid degradation of dye pollutants using a solar concentrator

et al. 2016

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Here we demonstrate direct use of sulphate rich seaweed polysaccharides Carrageenans namely kappa (κ-), iota (ι-) and lambda (λ-) as source of sulfur and carbon doping in photocatalyst TiO2. During TiO2 synthesis in presence of sulphate rich carrageenan leaves mainly residual carbon and sulfur doping resulted in highly active photocatalyst. Evaluation of dye degradation pattern shows rapid degradation of Reactive Black-5, Methylene Blue & Methyl Orange dyes using modified TiO2 nanocomposites in different light sources. Robust dye degradation was achieved between 1-4 h under daylight. Whereas, use of solar concentrator reduced the degradation time of MB and RB-5 to <5 min and MO solution was turned colorless within 20 min. Present study elaborates effect of seaweed carrageenans in inducing heteroatom like sulfur and residual carbon on photodegradation of industrially important dyes.

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“…The points of zero charge (pH pzc ) of hydrogels were determined according to our previous work [22]. In this series of experiments, 20 mL of 0.05 M of NaCl solution was poured into several beakers and the pH of NaCl solutions was adjusted from 1 to 11 by adding either 0.1 M of HCl or 0.1 M of NaOH solutions.…”

Section: Point Of Zero Chargementioning

confidence: 99%

Synthesis of magnetic carboxymethyl chitosan-g-poly(acrylamide)/laponite RD nanocomposites with enhanced dye adsorption capacity

Mahdavinia

Karami

2015

Polym. Bull.

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This investigation reports the synthesis of magnetic nanocomposite hydrogels based on carboxymethyl chitosan-g-poly(acrylamide) (CMC-g-PAAm). The magnetic nanoparticles were prepared via in situ co-precipitation of iron salts in the presence of laponite RD nanoclay. Different contents of magnetic nanoclay were utilized to prepare magnetic CMC-g-PAAm nanocomposites. The structure of nanocomposite hydrogels was characterized by transmittance electron microscopy, scanning electron microscopy, X-ray diffraction, thermogravimetric analysis, and vibrating sample magnetometer techniques. The obtained magnetic nanocomposites were examined to remove crystal violet (CV) cationic dye from aqueous solutions. By introducing magnetic laponite RD, the nanocomposites showed an enhanced adsorption capacity for CV dye. Equilibrium adsorption data were modeled according to Langmuir and Freundlich isotherm models. The following experimental isotherm data from models was affected by the content of magnetic laponite RD. The maximum adsorption of crystal violet on magnetic nanocomposite hydrogels was 169 mg g -1 . In addition to high adsorption capacity of magnetic nanocomposites for CV, the regeneration of obtained adsorbents was effective and the corresponding nanocomposites may be considered as new candidate in the treatment of colored water.

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Study of adsorption of cationic dye on magnetic kappa-carrageenan/PVA nanocomposite hydrogels

Cited by 146 publications

References 42 publications

Recent Progress on the Design and Applications of Polysaccharide‐Based Graft Copolymer Hydrogels as Adsorbents for Wastewater Purification

Recent Progress on the Design and Applications of Polysaccharide‐Based Graft Copolymer Hydrogels as Adsorbents for Wastewater Purification

Fabrication of carbon and sulphur-doped nanocomposites with seaweed polymer carrageenan as an efficient catalyst for rapid degradation of dye pollutants using a solar concentrator

Synthesis of magnetic carboxymethyl chitosan-g-poly(acrylamide)/laponite RD nanocomposites with enhanced dye adsorption capacity

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