Biosorption of Sr(II) from aqueous solutions using aerobic granules: equilibrium and mechanisms
Journal
Journal of Radioanalytical and Nuclear Chemistry
Journal Volume
306
Journal Issue
1
Pages
193-202
Date Issued
2015
Author(s)
Abstract
Aqueous strontium biosorption using aerobic granules was investigated. Parameters affecting the biosorption were optimized, including initial pH, biomass dosage, temperature, and rotation speed. The equilibrium data were fitted using Langmuir and Freundlich models, and both could well describe the process (R2?=?0.987 and 0.989, respectively). Ion exchange and water-desorption experiments were conducted, and ion exchange together with physical adsorption were found to be the main mechanisms. The aerobic granules were characterized with methods including scanning electron microscopy, X-ray photoelectron spectroscopy, and Fourier transform infrared spectroscopy. The results showed that surface complexation could also be involved in the Sr(II) biosorption. ? 2015, Akad?miai Kiad?, Budapest, Hungary.
Subjects
Adsorption mechanism
Aerobic granules
Isotherm
Removal
Strontium
Type
journal article