Dye adsorption characteristics of alginate/polyaspartate hydrogels

Jeon, Young Sil; Jing, Lei; Kim, Ji‐Heung

doi:10.1016/j.jiec.2008.07.007

Cited by 154 publications

(49 citation statements)

References 22 publications

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“…8). The values of Langmuir constants ( Table 2) are comparable to those obtained in previous MB adsorption experiments on alginate/polyaspartate hydrogels [25], or on biohybrid SiO 2 -alginate [26].…”

Section: Resultssupporting

confidence: 84%

“…Studies were conducted to establish a scheme of MB adsorption by porous calcium alginate beads and their affinity for the cationic substrates. Porous structure of alginate beads favors the electrostatic interaction between the polymer carboxylic functional groups and cationic groups of the MB [25]. A conceptual scheme of the Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Thus, previous studies have demonstrated that nitrophenolic pollutants can be retained from wastewaters by alginate complexes [23,24], and others have shown that dyes like methylene blue can be retained from aqueous solutions by alginate/polyaspartate hydrogels or by biohybrid SiO 2 -alginate, but the adsorbed amounts were not very significant [25,26].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis, characterization and adsorption properties of alginate porous beads

et al. 2015

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Original calcium alginate beads with porous structure and high adsorption surface are proposed. The beads were synthesized using sodium alginate in the presence of sodium dodecyl sulfate as foaming agent, NaCl as porogen agent and CaCl 2 as cross-linker. They were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy and Brunauer-Emmett-Teller method. The adsorption capacity of beads was tested with methylene blue (MB). The data show that the adsorption efficiency increases with the amount of beads, decreases with pollutant concentration, and is maximal at pH = 9. The adsorption is fast in the first 3 hours, and slows down thereafter. The kinetic results show that the adsorption of MB on alginate porous beads obeys the Langmuir model. A scheme of MB adsorption taking into account the ionic interactions with calcium alginate beads has been proposed.

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Section: Resultssupporting

confidence: 84%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis, characterization and adsorption properties of alginate porous beads

et al. 2015

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“…Such a cross-linked hydrogel is useful in controlled release of bioactive molecules. However, like most of the biopolymer based hydrogels, sodium alginate based hydrogels are also of poor mechanical strength (Jeon, Lei, & Kim, 2008). Properties of sodium alginate based hydrogel may be improved by physical or chemical modification.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of interpenetrating network hydrogel from poly(acrylic acid-co-hydroxyethyl methacrylate) and sodium alginate: Modeling and kinetics study for removal of synthetic dyes from water

Mandal¹,

Ray

2013

Carbohydrate Polymers

155

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“…In fact, it is known that charged hydrogels are able to adsorb effectively from water oppositely charged organic and inorganic pollutants. Thus, numerous studies have been devoted to the adsorption of cationic dyes, used as model pollutants, by anionic hydrogels (Jeon et al, 2008;Paulino et al, 2006;Solpan et al, 2003;Tang et al, 2009) containing weakly acidic or strongly charged groups.…”

Section: Introductionmentioning

confidence: 99%

Poly(sodium acrylate) hydrogels as potential pH-sensitive sorbents for the removal of model organic and inorganic pollutants from water

2013

Global NEST Journal

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Anionic poly(sodium acrylate), PANa, hydrogels bearing negatively charged -COO -groups were used as sorbents for the removal of colored organic or inorganic model pollutants, namely Crystal Violet and Cu 2+, from water. It was found that PANa hydrogels adsorb stronger Cu 2+ ions than Crystal Violet, as a consequence of the formation of coordination complexes between the hydrogel and the metal ions, while just electrostatic interactions are the major driving forces for Crystal Violet. Furthermore, the influence of pH, i.e. the neutralization degree i of the hydrogel, on its adsorption efficiency was investigated. It is shown that the adsorption of Cu 2+ ions follows stoichiometry, namely one metal ion per two carboxylate anions. On the contrary, the adsorption of Crystal Violet is much lower than the charged stoichiometry.

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Dye adsorption characteristics of alginate/polyaspartate hydrogels

Cited by 154 publications

References 22 publications

Synthesis, characterization and adsorption properties of alginate porous beads

Synthesis, characterization and adsorption properties of alginate porous beads

Synthesis of interpenetrating network hydrogel from poly(acrylic acid-co-hydroxyethyl methacrylate) and sodium alginate: Modeling and kinetics study for removal of synthetic dyes from water

Poly(sodium acrylate) hydrogels as potential pH-sensitive sorbents for the removal of model organic and inorganic pollutants from water

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