Please use this identifier to cite or link to this item: https://hdl.handle.net/11499/8329
Title: Biosorption of radiostrontium by alginate beads: Application of isotherm models and thermodynamic studies
Authors: Gök, Cem
Gerstmann, U.
Aytas, S.
Keywords: Alginate beads
Biosorption
Modelling
Strontium
Thermodynamic
alginic acid
calcium ion
strontium 85
article
biosorption
chemical parameters
concentration response
contact time
controlled study
correlation analysis
cross linking
Dubinin Radushkevich model
egg box model
Emmer and Teller model
Flory Huggins and Brunauer model
Freundlich model
isotherm
Langmuir model
mathematical model
model
pH
radioactive contamination
Temkin model
temperature
thermodynamics
Abstract: Radioactive strontium is one of the major radioactive contaminant and its contamination is a very serious concern. Therefore, there is a need for economic, effective, non-toxic, readily available and abundant adsorbent or biosorbent to remove strontium from solutions. In this study, biosorption of 85Sr as a surrogate for 90Sr onto alginate beads was investigated in a batch system. Alginate beads were prepared from Na-alginate via cross-linking with divalent calcium ions according to the egg box model. The effect of several parameters such as pH, initial strontium concentration, contact time, dosage of alginate beads and temperature were investigated. In order to optimize the design of biosorption system for the removal of strontium, it is important to establish the most appropriate correlation for equilibrium curves. The experimental isotherm data were described by 6 different biosorption isotherm models, namely Langmuir, Freundlich, Dubinin-Radushkevich, Temkin, Flory-Huggins and Brunauer, Emmer and Teller, with constants obtained from linear and non-linear regression methods. The thermodynamic parameters (?H°, ?S° and ?G°) for strontium biosorption were also determined. The results indicate that these alginate beads have a good potential for the biosorption of strontium from solutions. © 2012 Akadémiai Kiadó, Budapest, Hungary.
URI: https://hdl.handle.net/11499/8329
https://doi.org/10.1007/s10967-012-1838-3
ISSN: 0236-5731
Appears in Collections:Fen-Edebiyat Fakültesi Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

Show full item record



CORE Recommender

SCOPUSTM   
Citations

24
checked on Dec 7, 2024

WEB OF SCIENCETM
Citations

24
checked on Dec 10, 2024

Page view(s)

50
checked on Aug 24, 2024

Google ScholarTM

Check




Altmetric


Items in GCRIS Repository are protected by copyright, with all rights reserved, unless otherwise indicated.