Synthesis of magnetic alginate beads based on magnesium ferrite (MgFe 2 O 4 ) nanoparticles for removal of Sr (II) from aqueous solution: kinetic, equilibrium and thermodynamic studies.

Autor: Yakout SM; Hot Laboratories and Waste Management Centre, Atomic Energy Authority, P.O. 13759, Cairo, Egypt E-mail: syakout@ksu.edu.sa; Biochemistry Department, King Saud University, P.O. Box, 2455, Riyadh 11451, Kingdom of Saudi Arabia., Hassan MR; Nuclear Research Center, Atomic Energy Authority, P.O. 13759, Inshas, Cairo, Egypt., Aly MI; Hot Laboratories and Waste Management Centre, Atomic Energy Authority, P.O. 13759, Cairo, Egypt E-mail: syakout@ksu.edu.sa.
Jazyk: angličtina
Zdroj: Water science and technology : a journal of the International Association on Water Pollution Research [Water Sci Technol] 2018 Jun; Vol. 77 (11-12), pp. 2714-2722.
DOI: 10.2166/wst.2018.228
Abstrakt: Novel magnetic alginate beads (MagAlgbeads) have been developed by incorporation of magnesium ferrite (MgFe 2 O 4 ) in alginate beads with the aim of using them in the removal of strontium from aqueous solution. MagAlgbeads were characterized by transmission electron microscopy, scanning electron microscopy, X-ray fluorescence and Fourier transform infrared spectroscopy. The adsorption of strontium onto MagAlgbeads were found to depend on pH and strontium removal increases with increasing pH until pH is 6. Strontium adsorption kinetics run through pseudo-second-order model. Thermodynamically, strontium adsorption was endothermic and spontaneous. Langmuir isotherm gave good fitting for strontium removal with adsorption capacity of 505.5 mg/g. These results proved that the prepared MagAlgbeads are very efficient material for strontium adsorption.
Databáze: MEDLINE
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