Analysis of a constant-volume diafiltration system with the ability to remove lithium cations when using poly(2-acrylamido-2-methyl-1-propanesulfonic acid) in water

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dc.contributor.authorTapiero, Yesid
dc.contributor.authorSanchez, Julio
dc.date.accessioned2025-01-20T16:06:28Z
dc.date.available2025-01-20T16:06:28Z
dc.date.issued2024
dc.description.abstractThis study describes the synthesis of a poly(2-acrylamido-2-methyl-1-propanesulfonic acid) (PAMPS) and its application for the removal of Li+ in water using a constant-volume diafiltration system. PAMPS with molecular weights exceeding 100 kDa (88 % w/w), polymerisation yields of 97 % and high acidity was obtained. A block experimental design characterized the diafiltration system reporting: Regenerated cellulose (RC) and polyethersulfone (PES) ultrafiltration membranes with a molecular cut-off of 100 kDa can retain up to 1 % Li+ ions through surface charges. But when PAMPS 2000 kDa was used, 89 % of Li+ was removed (%R). Permeate flux (J(s)) decreases with increasing PAMPS:Li+ ratio, whereas the %R value increases. The filtration process is controlled by diffusion mechanisms according to the Peclet dimensionless number. Using PAMPS 100 kDa with a PAMPS:Li+ ratio (20:1), %R decreases to 76 %, whereas J(s) increases slightly. PAMPS can be reused 3 consecutive times, maintaining a Li+ cation rejection efficiency of >60 %. Additionally, it was found that the percentage of Li+ rejection capacity exercised with PAMPS is reduced to 60 % when Ca2+, K+, Mg2+ and Na+ cations are present.
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.jwpe.2024.106232
dc.identifier.issn2214-7144
dc.identifier.urihttps://doi.org/10.1016/j.jwpe.2024.106232
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/89958
dc.identifier.wosidWOS:001331120700001
dc.language.isoen
dc.revistaJournal of water process engineering
dc.rightsacceso restringido
dc.subjectLithium
dc.subjectMembrane
dc.subjectUltrafiltration
dc.subjectWater-soluble polymers
dc.subjectRejection
dc.subjectPeclet number
dc.titleAnalysis of a constant-volume diafiltration system with the ability to remove lithium cations when using poly(2-acrylamido-2-methyl-1-propanesulfonic acid) in water
dc.typeartículo
dc.volumen67
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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