Sodium alginate/Na+-rectorite composite microspheres: Preparation, characterization, and dye adsorption

Yang, Lianli; Ma, Xiaoyan; Nai-ni, Guo

doi:10.1016/j.carbpol.2012.06.011

Cited by 43 publications

(20 citation statements)

References 27 publications

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“…The interlayer space of Na + ‐MMT was extended, and the intercalated CFS/Na + ‐MMT composite was formed. Similar conclusions were also obtained by other researchers .…”

Section: Resultssupporting

confidence: 93%

Preparation of cationic functional starch/Na⁺‐MMT composite and its application for effective removal of three hazardous metal anionic ions with different valence

et al. 2014

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The design of cost‐effective biopolymers‐based adsorbents is of particular interest. In our work, a cationic functional starch (CFS)/Na+‐montmorillonite (Na+‐MMT) composite was prepared by combining 5 wt% modified starch containing quaternary ammonium cationic functional groups and 0.5% w/v Na+‐MMT dispersed solution together. Its microstructure was characterized by FTIR and XRD. Removal of three metal anionic ions with different valence like: MnnormalO4−, Cnormalr2normalO72−, and Fe(CN)63− by the composite was compared. Adsorption equilibrium, kinetics, and thermodynamic models were also investigated. The adsorption capacity was very high and followed the sequence of MnnormalO4− > Cnormalr2normalO72− > Fe(CN)63−, which could be demonstrated with strong electrostatic interaction between active cationic functional groups and metal anionic ions. The Langmuir isotherm gave satisfying fits to equilibrium data of MnnormalO4− ions indicating monolayer adsorption to monovalent anionic ion, while the Freundlich equation fitting equilibrium data of Cnormalr2normalO72− and Fe(CN)63− ions better predicated multilayer adsorption to polyvalent anionic ion. There was a better matching accuracy between the experimental data and the pseudo second order model. The removal percentages for the three ions of MnnormalO4−, Cnormalr2normalO72−, Fe(CN)63− by the composite were 96.84, 94, and 89.84%, respectively.

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“…The interlayer space of Na + ‐MMT was extended, and the intercalated CFS/Na + ‐MMT composite was formed. Similar conclusions were also obtained by other researchers .…”

Section: Resultssupporting

confidence: 93%

Preparation of cationic functional starch/Na⁺‐MMT composite and its application for effective removal of three hazardous metal anionic ions with different valence

et al. 2014

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“…Various kinds of competent adsorbents have been reported (Yang et al 2012). Activated carbon is the most widely used adsorbent to remove contaminants from wastewater because of its extended surface area, microporous structure, high adsorption capacity, and a high degree of surface reactivity (Maghsoodloo et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Rhodamine 6G and humic acids on composite bentonite–alginate in single and binary systems

et al. 2018

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In this work, the preparation, characterization, and sorption of rhodamine 6G and humic acids on a composite sodium alginate-bentonite were investigated. Their structure and morphology were analyzed by several techniques, including Fourier transform infrared spectroscopy, X-ray diffraction, and N 2 adsorption at − 196 °C. A synergetic sorption mechanism was observed in binary systems; humic acids adsorption was enhanced by the presence of Rh6G in the mixture. The kinetic studies revealed that the sorption follows a pseudo-first-order kinetic model and the sorption capacities of Rh6G increased with the pH value. The Langmuir isothermal model well described the adsorption isotherm data, showing a maximum adsorption capacity for Rh6G up to 429.5 mg/g at 20 °C. On the basis of the data of the present investigation, it is possible to conclude that the composite exhibited excellent affinity for the dye and humic acids, and it can be applied to treat wastewater containing dye and natural organic matter.

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“…MC has been utilized to prepare hydrogels by crosslinking with dialdehyde in the presence of a strong acid. On the other hand, sodium alginate (SA) is a well-known polymer of polysaccharide origin; it is mainly composed of (1-4) linked b-D manuronic acid and a-L-guluronic acid units [13,14]. It has excellent gel forming ability, biocompatibility and biodegradability which makes it a suitable candidate for biomedical, controlled release applications and matrices for enzyme immobilization, etc.…”

Section: Introductionmentioning

confidence: 99%

Antimicrobial and in vitro wound healing properties of novel clay based bionanocomposite films

Mishra

Ramasamy

Lim

et al. 2014

J Mater Sci: Mater Med

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The present study investigates the development of methyl cellulose (MC)-sodium alginate (SA)-montmorillonite (MMT) clay based bionanocomposite films with interesting wound healing properties. The differential scanning calorimetry analysis of the composite films revealed presence of single glass transition temperature (Tg) confirming the miscible nature of the ternary blended films. The increase in MMT ratio in the composite films reduced the mobility of biopolymer chains (MC/SA) which increased the Tg of the film. Thermogravimetric analysis showed that dispersion of clay (MMT) at nano level significantly delayed the weight loss that correlated with higher thermal stability of the composite films. It was observed that the developed films were able to exhibit antimicrobial activity against four typical pathogenic bacteria found in the presence of wound. The developed films were able to significantly inhibit (10 mg/ml) the growth of Enterococcus faecium and Pseudomonas aeruginosa. In vitro scratch assay indicated potential wound closure activities of MC-2-4 bionanocomposite films at their respective highest subtoxic doses. In conclusion, these ternary bionanocomposite films were found to be promising systems for wound healing applications.

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Sodium alginate/Na+-rectorite composite microspheres: Preparation, characterization, and dye adsorption

Cited by 43 publications

References 27 publications

Preparation of cationic functional starch/Na⁺‐MMT composite and its application for effective removal of three hazardous metal anionic ions with different valence

Preparation of cationic functional starch/Na⁺‐MMT composite and its application for effective removal of three hazardous metal anionic ions with different valence

Adsorption of Rhodamine 6G and humic acids on composite bentonite–alginate in single and binary systems

Antimicrobial and in vitro wound healing properties of novel clay based bionanocomposite films

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Sodium alginate/Na+-rectorite composite microspheres: Preparation, characterization, and dye adsorption

Cited by 43 publications

References 27 publications

Preparation of cationic functional starch/Na+‐MMT composite and its application for effective removal of three hazardous metal anionic ions with different valence

Preparation of cationic functional starch/Na+‐MMT composite and its application for effective removal of three hazardous metal anionic ions with different valence

Adsorption of Rhodamine 6G and humic acids on composite bentonite–alginate in single and binary systems

Antimicrobial and in vitro wound healing properties of novel clay based bionanocomposite films

Contact Info

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Resources

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Preparation of cationic functional starch/Na⁺‐MMT composite and its application for effective removal of three hazardous metal anionic ions with different valence

Preparation of cationic functional starch/Na⁺‐MMT composite and its application for effective removal of three hazardous metal anionic ions with different valence