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Master's Dissertation
DOI
https://doi.org/10.11606/D.85.2010.tde-29082011-103325
Document
Author
Full name
Tania Regina de Borba
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2010
Supervisor
Committee
Marumo, Júlio Takehiro (President)
Kunigk, Leo
Sakata, Solange Kazumi
Title in Portuguese
Estudo da aplicação de biossorventes no tratamento de rejeitos radioativos líquidos contendo Amerício-241.
Keywords in Portuguese
amerício-241
bactérias
bioacumulação
biossorção
Abstract in Portuguese
O uso da energia nuclear para as mais diversas finalidades tem se intensificado e destacado pelos benefícios que proporciona. A medicina diagnóstica e terapêutica, a agricultura, a indústria, a geração de energia elétrica, são alguns exemplos. Entretanto, o uso da energia nuclear gera rejeitos radioativos e estes requerem tratamento adequado para garantir a segurança ambiental e dos seres vivos. A biossorção e bioacumulação representam uma alternativa emergente, para o tratamento de rejeitos radioativos líquidos, proporcionando redução de volume e mudança de estado físico. Este trabalho teve como objetivos estudar biossorventes para promover o tratamento de rejeitos líquidos contendo Amerício-241, proporcionando redução de volume e mudando seu estado físico para sólido. Os biossorventes avaliados foram: Saccharomyces cerevisiae imobilizadas em alginato de cálcio, Saccharomyces cerevisiae livres e inativadas, alginato de cálcio, Bacillus subtilis, Cupriavidus metallidurans e Ochrobactrum anthropi. Os resultados foram bastante satisfatórios, chegando a 100 % em alguns casos. Esta técnica parece viável para a implantação no Laboratório de Rejeitos Radioativos do IPEN - CNEN/SP a curto prazo, por ser simples e de baixo custo.
Title in English
A study on application of biosorbents for treatment of radioactive liquid waste containing americium-241
Keywords in English
americium-241
bacteria
bioaccumulation
biosorption
Abstract in English
The use of nuclear energy for many different purposes has been intensified and highlighted by the benefits that it provides. Medical diagnosis and therapy, agriculture, industry and electricity generation are examples of its application. However, nuclear energy generates radioactive wastes that require suitable treatment ensuring life and environmental safety. Biosorption and bioaccumulation represent an emergent alternative for the treatment of radioactive liquid wastes, providing volume reduction and physical state change. This work aimed to study biosorbents for the treatment of radioactive liquid wastes contaminated with americium-241 in order to reduce the volume and change the physical state from liquid to solid. The biosorbents evaluated were Saccharomyces cerevisiae immobilized in calcium alginate beads, inactivated and free cells of Saccharomyces cerevisiae, calcium alginate beads, Bacillus subtilis, Cupriavidus metallidurans and Ochrobactrum anthropi. The results were quite satisfactory, achieving 100% in some cases. The technique presented in this work may be useful and viable for implementing at the Waste Management Laboratory of IPEN CNEN/SP in short term, since it is an easy and low cost method.
 
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2010BorbaEstudo.pdf (3.05 Mbytes)
Publishing Date
2011-10-17
 
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