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Carbohydr Polym ; 187: 85-93, 2018 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-29486848

RESUMO

Sodium alginate (SA) beads with ultrahigh adsorption capacity were prepared via hydrogen bonds between SA and 2-acrylamido-2-methylpropa-1-propanesulfonic acid (AMPS), and the AMPS was then post-cross-linked to manufacture SA/PAMPS beads. The equilibrium adsorption capacities of methylene blue (MB) and Pb2+ for the SA/PAMPS10 beads were 2977 and 2042 mg/g, respectively. Although the SA beads exhibited higher equilibrium adsorption capacities of MB and Pb2+ than those of the SA/PAMPS10 beads, the SA/PAMPS10 beads had better mechanical property and higher stability. The pseudo-second-order kinetic model and the Langmuir isotherm described the adsorption processes of the SA/PAMPS10 beads for MB well. In addition, the SA/PAMPS10 beads could be reused with stable adsorption capacity for at least three cycles. The beads also had excellent performances on absorbing methylene violet and other heavy metal ions (Cu2+, Cd2+ and Ni2+). Therefore, the SA-based beads with high adsorption capacity might be good candidates for industrial pollutant treatments.


Assuntos
Alginatos/química , Cátions/química , Corantes/química , Adsorção , Ácido Glucurônico/química , Ácidos Hexurônicos/química , Concentração de Íons de Hidrogênio , Cinética , Metais Pesados/química , Poluentes Químicos da Água , Purificação da Água
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