期刊
CARBOHYDRATE POLYMERS
卷 187, 期 -, 页码 85-93出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2018.01.092
关键词
Sodium alginate; Poly (2-acrylanmido-2-methylpropa-1-sulfonic acid); Cross-linked beads; Wastewater treatment
资金
- National Natural Science Foundation of China [51503125, 51673125]
- State Key Laboratory of Polymer Materials Engineering [sklpme2017-3-07]
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.
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