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Žukauskaitė Z, Druteikienė R, Tarasiuk N, Tautkus S, Niaura G, Ignatjev I, Baltušnikas A, Konstantinova M, Maceika E, Kazakevičiūtė-Jakučiūnienė L, Buivydas Š, Jasinevičienė D, Gvozdaitė R. Separation of anthropogenic radionuclides from aqueous environment using raw and modified biosorbents. J Environ Radioact 2022; 244-245:106829. [PMID: 35121277 DOI: 10.1016/j.jenvrad.2022.106829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 01/19/2022] [Accepted: 01/26/2022] [Indexed: 06/14/2023]
Abstract
In this study, two types of biosorbents were used to remove 137Cs and plutonium isotopes from aqueous solutions - moss (Ptilium crista - castrensis) and oak sawdust (Quercus robur), both in the form of natural and modified state. Sorbent modification significantly increases the sorbent surface area (for moss sorbents - from 4.0 to 47.2 m2/g, and for sawdust sorbents - from 1.1 to 26.3 m2/g), pore volume (from 10-3 to 10-2), concentration and amount of basic cations and anions, as well as active functional groups on the sorbent surface. The main functional groups on the surface of natural sorbents modified with iron hydroxide interacting with analytes are carboxyl and hydroxyl groups. For carbonized sawdust and its subsequent activation with concentrated HCl, in addition to carboxyl and hydroxyl groups, acetyl groups also become active. Carbonated sawdust treated with HCl showed the highest average removal efficiency and sorption capacity for radiocesium and plutonium isotopes in laboratory column experiments - for 137Cs ∼78.6% and ∼196.6 Bq/g and for 239+240Pu ∼83% and ∼41.5 Bq/g, respectively. The moss and moss modified with iron hydroxide also showed good properties of adsorbing plutonium isotopes in field (in-situ) experiments. The best results on the sorption of 137Cs in field experiments were shown by carbonated sawdust activated with HCl, and for isotopes of plutonium - the raw moss and moss modified with iron hydroxide. The results of the study showed that sorbents can be used not only for purification of water from plutonium isotopes but allow the operational sampling and more accurate measurement of radiocesium and plutonium isotopes in the fresh water reservoirs by the dynamic flow method.
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Affiliation(s)
- Z Žukauskaitė
- State Research Institute Center for Physical Sciences and Technology Public Institution, Savanorių ave. 231, LT-02300, Vilnius, Lithuania.
| | - R Druteikienė
- State Research Institute Center for Physical Sciences and Technology Public Institution, Savanorių ave. 231, LT-02300, Vilnius, Lithuania.
| | - N Tarasiuk
- State Research Institute Center for Physical Sciences and Technology Public Institution, Savanorių ave. 231, LT-02300, Vilnius, Lithuania
| | - S Tautkus
- Institute of Chemistry, Faculty of Chemistry and Geosciences, Vilnius University, Naugarduko st. 24, 03225, Vilnius, Lithuania
| | - G Niaura
- State Research Institute Center for Physical Sciences and Technology Public Institution, Savanorių ave. 231, LT-02300, Vilnius, Lithuania
| | - I Ignatjev
- State Research Institute Center for Physical Sciences and Technology Public Institution, Savanorių ave. 231, LT-02300, Vilnius, Lithuania
| | - A Baltušnikas
- Lithuanian Energy Institute Public institution, Breslaujos st. 3, LT-44403, Kaunas, Lithuania
| | - M Konstantinova
- State Research Institute Center for Physical Sciences and Technology Public Institution, Savanorių ave. 231, LT-02300, Vilnius, Lithuania
| | - E Maceika
- State Research Institute Center for Physical Sciences and Technology Public Institution, Savanorių ave. 231, LT-02300, Vilnius, Lithuania
| | - L Kazakevičiūtė-Jakučiūnienė
- State Research Institute Center for Physical Sciences and Technology Public Institution, Savanorių ave. 231, LT-02300, Vilnius, Lithuania
| | - Š Buivydas
- State Research Institute Center for Physical Sciences and Technology Public Institution, Savanorių ave. 231, LT-02300, Vilnius, Lithuania
| | - D Jasinevičienė
- State Research Institute Center for Physical Sciences and Technology Public Institution, Savanorių ave. 231, LT-02300, Vilnius, Lithuania
| | - R Gvozdaitė
- State Research Institute Center for Physical Sciences and Technology Public Institution, Savanorių ave. 231, LT-02300, Vilnius, Lithuania
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Trinkunaite-Felsen J, Birkedal H, Zarkov A, Tautkus S, Stankeviciute Z, Kareiva A. Environmentally benign fabrication of calcium hydroxyapatite using seashells collected in Baltic Sea countries: A comparative study. PHOSPHORUS SULFUR 2016. [DOI: 10.1080/10426507.2015.1114947] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
| | - H. Birkedal
- Department of Chemistry and iNANO, Aarhus University, Aarhus C, Denmark
| | - A. Zarkov
- Faculty of Chemistry, Vilnius University, Vilnius, Lithuania
| | - S. Tautkus
- Faculty of Chemistry, Vilnius University, Vilnius, Lithuania
| | | | - A. Kareiva
- Faculty of Chemistry, Vilnius University, Vilnius, Lithuania
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