Journal
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
Volume 125, Issue -, Pages 808-819Publisher
ELSEVIER
DOI: 10.1016/j.ijbiomac.2018.12.112
Keywords
Amino-functionalized SBA-15; Mesoporous materials; Alginate
Funding
- National Natural Science Foundation of China [21476212]
- Science and Technology Department of Zhejiang Province [2018C02038]
- Bureau of Science and Technology of Zhoushan [2017C41005]
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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 pH 6 and 298 K, the adsorption reached equilibrium after 100 min and the sample exhibited a good adsorption effect, affording a maximum adsorption capacity of 1029.58 mg/g and a removal rate as high as 98.99%. The adsorption process conformed to the Langmuir model (R-2 = 0.9937) and followed the pseudo-second-order kinetics model (R-2 = 0.9995). Regeneration experiments showed that the removal rate of the sample reached 75% even after 6 cycles. Overall, this study provides new insights into the development of novel, highly efficient, and repeatable degradation materials for the removal of Pb(II). (C) 2018 Elsevier B.V. All rights reserved.
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