Highly efficient adsorption of Pb(II) from aqueous solution using amino-functionalized SBA-15/calcium alginate microspheres as adsorbent.
Int J Biol Macromol
; 125: 808-819, 2019 Mar 15.
Article
em En
| MEDLINE
| ID: mdl-30562520
ABSTRACT
In this work, amino-functionalized Santa Barbara Amorphous-15/calcium alginate (ASBA-15@CA) microspheres were fabricated and characterized by FTIR, SEM, XRD, TGA, and XPS analyses. The Pb(II) adsorption properties of the ASBA-15@CA microspheres were studied in terms of the effects of the adsorption time, adsorbent dose, solution pH, temperature, and initial concentration of Pb(II) on the adsorption capacity. At pHâ¯6 and 298â¯K, the adsorption reached equilibrium after 100â¯min and the sample exhibited a good adsorption effect, affording a maximum adsorption capacity of 1029.58â¯mg/g and a removal rate as high as 98.99%. The adsorption process conformed to the Langmuir model (R2â¯=â¯0.9937) and followed the pseudo-second-order kinetics model (R2â¯=â¯0.9995). Regeneration experiments showed that the removal rate of the sample reached 75% even after 6â¯cycles. Overall, this study provides new insights into the development of novel, highly efficient, and repeatable degradation materials for the removal of Pb(II).
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1
Base de dados:
MEDLINE
Assunto principal:
Água
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Dióxido de Silício
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Alginatos
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Chumbo
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article