Versatile particles from water-soluble chitosan and sodium alginate for loading toxic or bioactive substance

You, Rongrui; Xiao, Congming; Zhang, Li; Dong, Yanrui

doi:10.1016/j.ijbiomac.2015.05.025

Cited by 21 publications

(7 citation statements)

References 30 publications

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“…where W 1 indicates the mass at saturation and W 0 corresponds to the initial dry mass. Furthermore, the time dependence of swelling ratio was determined maintaining the film samples in water at 22 • C. After pre-determined periods, the film was removed, gently compressed between filter papers (to remove the excess of water), then weighed and returned to the water bath [62]. Electron paramagnetic resonance (EPR) experiments were performed in an ESP300E Bruker X-band spectrometer.…”

Section: Methodsmentioning

confidence: 99%

The Innovation Comes from the Sea: Chitosan and Alginate Hybrid Gels and Films as Sustainable Materials for Wastewater Remediation

Tummino

Magnacca

Cimino

et al. 2020

IJMS

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The growing utilization of renewable and residual biomasses for environmental preservation and remediation are important goals to be pursued to minimize the environmental impact of human activities. In this paper, sodium alginate (derived from brown algae) was crosslinked using chitosan (mainly derived from the exoskeleton of crustaceans) in the presence of biowaste-derived substances isolated from green compost (BBS-GC), to produce hydrogels and dried films. The obtained materials were tested as adsorbents for wastewater remediation. To this purpose, gels were characterized using a multi-analytical approach and used as active substrates for the removal of three differently-charged molecules, chosen as model pollutants: crystal violet, rhodamine B, and orange II. The effectiveness of the gel formulations was demonstrated and attributed to the variety of active functionalities introduced by the different precursors, the structural factors and the peculiar physicochemical properties of the resulting materials.

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Section: Methodsmentioning

confidence: 99%

The Innovation Comes from the Sea: Chitosan and Alginate Hybrid Gels and Films as Sustainable Materials for Wastewater Remediation

Tummino

Magnacca

Cimino

et al. 2020

IJMS

View full text Add to dashboard Cite

show abstract

“…We evaluated the swelling of dried films: they were soaked in water, periodically removed (6 times during 6 h), gently compressed with a paper filter to remove excess moisture, and weighed at RT before returning them to the water bath [68] . The swelling ratio ( S ) was calculated according to Equation :

true S = W_{t} / W_{0}

…”

Section: Methodsmentioning

confidence: 99%

Waste Cleaning Waste: Combining Alginate with Biowaste‐Derived Substances in Hydrogels and Films for Water Cleanup

Tummino

Nisticò

Riedo

et al. 2020

Chemistry A European J

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Biowaste‐derived substances isolated from green compost (BBS‐GC) are environmentally friendly reactants similar to humic substances, which contain multiple functionalities, that are suitable for adsorbing different kinds of pollutants in wastewater. Herein, sodium alginate (derived from brown algae) cross‐linked with both Ca2+ ions and BBS‐GC in the form of hydrogels and dried films are proposed as green, easy‐to‐form, and handleable materials for tertiary water treatments. The results show that both hydrogels and films are mechanically stable and can effectively remove differently charged dyes through an adsorption mechanism that can be described by the Freundlich model. BBS‐GC‐containing gels always performed better than samples prepared without BBS‐GC, revealing that such unconventional materials can integrate waste valorization and water decontamination, potentially providing social and environmental benefits.

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“…However, most studies have verified the stability of alginate and xanthan at high pH [15][16][17]. You et al determined a 40% release of C-A particles after 4 h in pH 7.4 and a 20% release of haemoglobin in pH 4.4 [18]. Kulkarni et al demonstrated a 40-50% release of glipizide from C-X gum beads [19].…”

Section: Discussionmentioning

confidence: 99%

Development of pH-Responsive Biopolymeric Nanocapsule for Antibacterial Essential Oils

Skaličková

Aulichova

Venusová

et al. 2020

IJMS

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It is generally believed that antibacterial essential oils have the potential to become one of the alternatives in preventing diarrheal diseases of monogastric animals. The disadvantage is their low efficiency per oral due to easy degradation during digestion in the stomach. This study compares the efficacy of chitosan, alginate-chitosan, guar gum-chitosan, xanthan gum-chitosan and pectin-chitosan nanocapsules to the synthesis of pH-responsive biopolymeric nanocapsule for Thymus vulgaris, Rosmarinus officinalis and Syzygium aromaticum essential oils. Using spectrophotometric approach and gas chromatography, release kinetics were determined in pH 3, 5.6 and 7.4. The growth rates of S. aureus and E. coli, as well as minimal inhibition concentration of essential oils were studied. The average encapsulation efficiency was 60%, and the loading efficiency was 70%. The size of the nanocapsules ranged from 100 nm to 500 nm. Results showed that chitosan-guar gum and chitosan-pectin nanocapsules released 30% of essential oils (EOs) at pH 3 and 80% at pH 7.4 during 3 h. Similar release kinetics were confirmed for thymol, eugenol and α-pinene. Minimal inhibition concentrations of Thymus vulgaris and Syzygium aromaticum essential oils ranged from 0.025 to 0.5%. Findings of this study suggest that the suitable pH-responsive nanocapsule for release, low toxicity and antibacterial activity is based on chitosan-guar gum structure.

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Versatile particles from water-soluble chitosan and sodium alginate for loading toxic or bioactive substance

Cited by 21 publications

References 30 publications

The Innovation Comes from the Sea: Chitosan and Alginate Hybrid Gels and Films as Sustainable Materials for Wastewater Remediation

The Innovation Comes from the Sea: Chitosan and Alginate Hybrid Gels and Films as Sustainable Materials for Wastewater Remediation

Waste Cleaning Waste: Combining Alginate with Biowaste‐Derived Substances in Hydrogels and Films for Water Cleanup

Development of pH-Responsive Biopolymeric Nanocapsule for Antibacterial Essential Oils

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