ORIGINAL RESEARCH
New Effective Sorbents for Removal of Am-241
from Drinking Water
Agnieszka Gładysz-Płaska1,3, Agata Oszczak2, Leon Fuks2, Marek Majdan1
1Faculty of Chemistry, Maria Curie-Skłodowska University, M. C. Sklodowska Sq. 2, 20-031 Lublin, Poland
2Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warszawa, Poland
3On leave in the Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warszawa, Poland
2Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warszawa, Poland
3On leave in the Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warszawa, Poland
Submission date: 2016-01-18
Final revision date: 2016-04-10
Acceptance date: 2016-04-12
Publication date: 2016-11-24
Pol. J. Environ. Stud. 2016;25(6):2401–2410
KEYWORDS
TOPICS
ABSTRACT
Two new sorbents for americium(III) removal from an aqueous environment were studied: Volclay
bentonite and red clay – both modified by a cationic surfactant (hexadecyltrimethylammonium bromide)
and phosphate ions. Sorption of Am(III) was investigated using the batch method. It was concluded that
the kinetics of Am(III) sorption on both sorbents can be evaluated based on the pseudo-second-order
rate equation. The following two-parameter equations – Langmuir-Freundlich, Temkin, and Dubinin-
Radushkevich isotherms – were examined for their ability to model equilibrium sorption data. It was shown
that bentonite and red clay modified by phosphate ions exhibited better sorption properties toward Am(III)
ions than sodium forms of the adsorbents. This was probably a result of the complexation of Am(III) ions by
PO43- ions immobilized on the adsorbent surface in the form of ionic pairs with surfactant cations. Changes
in Am(III) sorption with pH were modeled based on the molar fractions of the particular complexes in the
aqueous phase, and it was concluded that Am(CO3)33- and Am(OH)3 species had a predominant influence on
the overall sorption process.
RELATED ARTICLE
We process personal data collected when visiting the website. The function of obtaining information about users and their behavior is carried out by voluntarily entered information in forms and saving cookies in end devices. Data, including cookies, are used to provide services, improve the user experience and to analyze the traffic in accordance with the Privacy policy. Data are also collected and processed by Google Analytics tool (more).
You can change cookies settings in your browser. Restricted use of cookies in the browser configuration may affect some functionalities of the website.
You can change cookies settings in your browser. Restricted use of cookies in the browser configuration may affect some functionalities of the website.