Structure · dataset · 2018
Ultrasound-assisted synthesis of polyacrylamide-grafted sodium alginate and its application in dye removal
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Description
Abstract
A polymeric adsorbent based on sodium alginate (SAG) grafted with polyacrylamide (PAM) (SAG- g-PAM) was synthesized using an ultrasound-assisted method. The addition polymerization was carried out with ammonium persulfate as the initiator, at different acrylamide (AM) concentrations. The SAG-g-PAM copolymers were evaluated by FTIR and 13C NMR spectroscopies, thermogravimetric analysis, grafting efficiency (%GE) and intrinsic viscosity in NaCl solution at 25 °C. Graft copolymers could be obtained in reaction lasting until 10 min by using ultrasound energy with grafting efficiency above 75%.
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The decolorization efficiency and adsorption capacity of the SAG- g-PAM copolymers were investigated in the adsorption of methylene blue (MB). The dye adsorption was pH dependent, and adsorption capacity (69.13 mg/g) maxima was at pH 10. All the graft copolymers have shown the same decolorization efficiency (99%), and the best one for MB removing is the SAG-g-PAM6 (%GE = 75%), since lower acrylamide content is required in the synthesis.
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- DOI doi.org/10.6084/m9.figshare.6317987 ↗
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- IsSupplementTo 10.1590/0104-1428.11316 doi.org/10.1590/0104-1428.11316 ↗
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Topics
- Stated by source
- Materials engineering
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|---|---|---|---|
| DataCite | 10.6084/m9.figshare.6317987 | 12 d ago | JSON v1 |
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