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Methylene Blue Release from Chitosan/Pectin and Chitosan/DNA Blend Hydrogels
Cassiele T Cesco1, Artur J M Valente2, Alexandre T Paulino1,3
1Department of Food and Chemical Engineering, Santa Catarina State University, Pinhalzinho 89870-000, Brazil.
Pharmaceutics
|July 2, 2021
Summary
Chitosan-based hydrogels were synthesized for methylene blue removal. Chitosan/DNA hydrogels showed better adsorption and smoother surfaces after dye loading, indicating potential for water purification.
Area of Science:
- Materials Science
- Polymer Chemistry
- Environmental Science
Background:
- Chitosan-based hydrogels are promising for pollutant adsorption.
- Developing efficient hydrogel systems for dye removal is crucial for water treatment.
Purpose of the Study:
- To synthesize and characterize chitosan/DNA blend hydrogel (CDB) and chitosan/pectin blend hydrogel (CPB).
- To evaluate their performance in adsorbing and releasing methylene blue (MB).
Main Methods:
- Emulsion (oil-in-water) technique for hydrogel synthesis.
- Characterization using swelling assays, FT-IR, TGA, and SEM.
- Methylene blue adsorption and release studies under various conditions.
Main Results:
- Both hydrogels exhibited higher swelling in simulated gastric fluid.
- FT-IR and TGA indicated changes post-MB loading, with CDB showing smoother surfaces.
- Adsorption capacity was higher at lower hydrogel mass and higher dye concentration.
- MB release was faster in simulated gastric fluid at 25°C, following pseudo-second-order kinetics.
Conclusions:
- Chitosan/DNA blend hydrogels demonstrate superior adsorption and structural stability for methylene blue removal.
- The hydrogels show potential for application in dye-contaminated water treatment.
- Adsorption and release mechanisms are influenced by hydrogel composition and environmental conditions.
