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dc.contributor.authorFeira, José Manoel Couto dapt_BR
dc.contributor.authorKlein, Jalma Mariapt_BR
dc.contributor.authorForte, Maria Madalena de Camargopt_BR
dc.date.accessioned2021-12-09T04:34:19Zpt_BR
dc.date.issued2018pt_BR
dc.identifier.issn0104-1428pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/232680pt_BR
dc.description.abstractA 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.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofPolímeros (São Carlos). Vol. 28, n. 2 (2018), p. 139-146pt_BR
dc.rightsOpen Accessen
dc.subjectGraft copolymeren
dc.subjectAdsorventespt_BR
dc.subjectAlginateen
dc.subjectAlginato de sódiopt_BR
dc.subjectAcrylamideen
dc.subjectPoliacrilamidapt_BR
dc.subjectUltrasounden
dc.subjectAdsorbentsen
dc.subjectMethylene blueen
dc.titleUltrasound-assisted synthesis of polyacrylamide-grafted sodium alginate and its application in dye removalpt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb001133114pt_BR
dc.type.originNacionalpt_BR


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