Engineering sodium alginate-based cross-linked beads with high removal ability of toxic metal ions and cationic dyes.
Carbohydr Polym
; 187: 85-93, 2018 May 01.
Article
em En
| MEDLINE
| ID: mdl-29486848
ABSTRACT
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 2042â¯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.
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Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Cátions
/
Corantes
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Alginatos
Idioma:
En
Ano de publicação:
2018
Tipo de documento:
Article