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Ultrasound-assisted synthesis of polyacrylamide-grafted sodium alginate and its application in dye removal
dc.contributor.author | Feira, José Manoel Couto da | pt_BR |
dc.contributor.author | Klein, Jalma Maria | pt_BR |
dc.contributor.author | Forte, Maria Madalena de Camargo | pt_BR |
dc.date.accessioned | 2021-12-09T04:34:19Z | pt_BR |
dc.date.issued | 2018 | pt_BR |
dc.identifier.issn | 0104-1428 | pt_BR |
dc.identifier.uri | http://hdl.handle.net/10183/232680 | pt_BR |
dc.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%. 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. | en |
dc.format.mimetype | application/pdf | pt_BR |
dc.language.iso | eng | pt_BR |
dc.relation.ispartof | Polímeros (São Carlos). Vol. 28, n. 2 (2018), p. 139-146 | pt_BR |
dc.rights | Open Access | en |
dc.subject | Graft copolymer | en |
dc.subject | Adsorventes | pt_BR |
dc.subject | Alginate | en |
dc.subject | Alginato de sódio | pt_BR |
dc.subject | Acrylamide | en |
dc.subject | Poliacrilamida | pt_BR |
dc.subject | Ultrasound | en |
dc.subject | Adsorbents | en |
dc.subject | Methylene blue | en |
dc.title | Ultrasound-assisted synthesis of polyacrylamide-grafted sodium alginate and its application in dye removal | pt_BR |
dc.type | Artigo de periódico | pt_BR |
dc.identifier.nrb | 001133114 | pt_BR |
dc.type.origin | Nacional | pt_BR |
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