Microwave-assisted melamine-based polyaminals and their application for metal cations adsorption

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dc.contributor.authorSandin, Ricardo
dc.contributor.authorGonzalez-Lucas, Maria
dc.contributor.authorSobarzo, Patricio A.
dc.contributor.authorTerraza, Claudio A.
dc.contributor.authorMaya, Eva M.
dc.date.accessioned2025-01-20T22:20:27Z
dc.date.available2025-01-20T22:20:27Z
dc.date.issued2021
dc.description.abstractThree new cross-linked melamine-based polyaminal networks containing phenyl (MA-iPh), pyridine (MA-Py) or thiophene (MA-Th) moieties were easily prepared by microwave irradiation (MW) in shorter reaction times (between 1.5 and 4 h) than conventional heating (72 h). The networks showed high nitrogen content (27-37%), specific surfaces between 34 and 424 m(2)g(-1) and high thermal stability (300 degrees C). The adsorption capacity of these polyaminals was determined over different toxic metals such as Cr(VI), Cu(II), Cd (II) and Pb(II) at different pH. The results showed greater chromium adsorption capacity in acid medium (pH 2), while the divalent cations were mainly adsorbed at pH 5. MA-Py that displayed the highest nitrogen content (37%) and highest specific surface area (424 m(2)g(-1)) also showed the highest adsorption capacities of this series, with values of 27.22, 26.42, and 53.13 mg/g for Cr(VI), Cd(II) and Pb(II); respectively. Additionally, MA-Py and MA-iPh with adsorption capacities of 29.12 and 25.02 mgg 1 for Cr(VI) and Cd(II), were competitive in terms of adsorption capacities regarding commercial ion exchange-resins which shown adsorptions in the range 13.7-21.3 mg/g.
dc.description.funderMICINN
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.eurpolymj.2021.110562
dc.identifier.eissn1873-1945
dc.identifier.issn0014-3057
dc.identifier.urihttps://doi.org/10.1016/j.eurpolymj.2021.110562
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/94624
dc.identifier.wosidWOS:000674448300006
dc.language.isoen
dc.revistaEuropean polymer journal
dc.rightsacceso restringido
dc.subjectPolyaminals
dc.subjectMelamine
dc.subjectMicrowave
dc.subjectMetal removal
dc.subjectAdsorption capacity
dc.subject.ods06 Clean Water and Sanitation
dc.subject.odspa06 Agua limpia y saneamiento
dc.titleMicrowave-assisted melamine-based polyaminals and their application for metal cations adsorption
dc.typeartículo
dc.volumen155
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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