Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/2840
Título: New magnetically responsive yeast-based biosorbent for the efficient removal of water-soluble dyes
Autor: Safarik, Ivo
Rego, Luis Filipe Teixeira
Borovska, Marie
Mosiniewicz-Szablewskae, Ewa
Weyda, Frantisek
Safarikova, Mirka
Palavras-chave: Fodder yeast
Kluyveromyces fragilis
Magnetic fluid
Magnetic iron oxides nanoparticles
Magnetically modified cells
Magnetic separation
Data: 2007
Editora: Elsevier
Citação: Enzyme and microbial technology". ISSN 0141-0229. 40: 2 (2007) 1551-1556
Resumo: Fodder yeast (Kluyveromyces fragilis) cells were magnetically modified by a contact with thewater-based magnetic fluid in order to prepare a new type of magnetically responsive biocomposite material. This procedure enabled a simple separation of modified cells by means of commercially available magnetic separators or strong permanent magnets. It allows using the prepared material as a new inexpensive magnetic affinity adsorbent for the removal of water-soluble dyes. Magnetically modified cells were characterized by means of magnetic and microscopy methods. Both isolated magnetic nanoparticles and aggregates of particles were present on the cell surface. The prepared material displayed a superparamagnetic behavior at room temperature, with a transition to a blocked state at TB 180K for the applied magnetic field H=50Oe. Seven dyes (crystal violet, amido black 10B, congo red, Saturn blue LBRR, Bismarck brown, acridine orange and safranin O) were used to study the adsorption process. The dyes adsorption could be described with the Langmuir isotherm. The maximum adsorption capacities ranged between 29.9 (amido black 10B) and 138.2 (safranin O) mg of dye per g of dried magnetically modified cells.
URI: http://hdl.handle.net/10400.14/2840
Versão do Editor: http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TG1-4M91NXJ-4&_user=10&_coverDate=05%2F02%2F2007&_rdoc=1&_fmt=high&_orig=search&_origin=search&_sort=d&_docanchor=&view=c&_searchStrId=1493813749&_rerunOrigin=google&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=28ba4765aaab3e036a37d4506512d5e2&searchtype=a
Aparece nas colecções:ESB - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review

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