Characterization of chemically modified chitosan microspheres as adsorbents using standard Proteins (bovine serum albumin and lysozyme)

Detalhes bibliográficos
Autor(a) principal: Torres,M. A.
Data de Publicação: 2007
Outros Autores: Beppu,M. M., Santana,C. C.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Brazilian Journal of Chemical Engineering
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322007000300003
Resumo: Chitosan microspheres with a mean size of 140 ± 119 µm were produced by the spray and coagulation methods. The microspheres were chemically modified using the following routes: a) crosslinking with glutaraldehyde b) crosslinking with epychlorohydrin and c) acetylation. For investigation of their ability as adsorbents, the following standard proteins were chosen as adsorbates: bovine serum albumin - BSA (pI = 4.8 and MW = 66 kDa) and lysozyme (pI = 11 and MW = 14 kDa). The adsorption experiments were performed using a static method. The adsorption media and equilibrium concentration of adsorbates were varied in the ranges of pH 4-11 and 0.07-0.70 mg.ml-1, respectively. The maximum adsorption capacities (q m) and the constant of the Langmuir model (Ks) were shown to be dependent on charge interactions and on the kind of treatment performed on chitosan microspheres. The satisfactory fit of a kinetic model to the experimental data shows that the step that controls the adsorption kinetics is probably the initial adsorbate transport.
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spelling Characterization of chemically modified chitosan microspheres as adsorbents using standard Proteins (bovine serum albumin and lysozyme)Chitosan microspheres BSA lysozyme adsorptionChitosan microspheres with a mean size of 140 ± 119 µm were produced by the spray and coagulation methods. The microspheres were chemically modified using the following routes: a) crosslinking with glutaraldehyde b) crosslinking with epychlorohydrin and c) acetylation. For investigation of their ability as adsorbents, the following standard proteins were chosen as adsorbates: bovine serum albumin - BSA (pI = 4.8 and MW = 66 kDa) and lysozyme (pI = 11 and MW = 14 kDa). The adsorption experiments were performed using a static method. The adsorption media and equilibrium concentration of adsorbates were varied in the ranges of pH 4-11 and 0.07-0.70 mg.ml-1, respectively. The maximum adsorption capacities (q m) and the constant of the Langmuir model (Ks) were shown to be dependent on charge interactions and on the kind of treatment performed on chitosan microspheres. The satisfactory fit of a kinetic model to the experimental data shows that the step that controls the adsorption kinetics is probably the initial adsorbate transport.Brazilian Society of Chemical Engineering2007-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322007000300003Brazilian Journal of Chemical Engineering v.24 n.3 2007reponame:Brazilian Journal of Chemical Engineeringinstname:Associação Brasileira de Engenharia Química (ABEQ)instacron:ABEQ10.1590/S0104-66322007000300003info:eu-repo/semantics/openAccessTorres,M. A.Beppu,M. M.Santana,C. C.eng2007-11-23T00:00:00Zoai:scielo:S0104-66322007000300003Revistahttps://www.scielo.br/j/bjce/https://old.scielo.br/oai/scielo-oai.phprgiudici@usp.br||rgiudici@usp.br1678-43830104-6632opendoar:2007-11-23T00:00Brazilian Journal of Chemical Engineering - Associação Brasileira de Engenharia Química (ABEQ)false
dc.title.none.fl_str_mv Characterization of chemically modified chitosan microspheres as adsorbents using standard Proteins (bovine serum albumin and lysozyme)
title Characterization of chemically modified chitosan microspheres as adsorbents using standard Proteins (bovine serum albumin and lysozyme)
spellingShingle Characterization of chemically modified chitosan microspheres as adsorbents using standard Proteins (bovine serum albumin and lysozyme)
Torres,M. A.
Chitosan microspheres BSA lysozyme adsorption
title_short Characterization of chemically modified chitosan microspheres as adsorbents using standard Proteins (bovine serum albumin and lysozyme)
title_full Characterization of chemically modified chitosan microspheres as adsorbents using standard Proteins (bovine serum albumin and lysozyme)
title_fullStr Characterization of chemically modified chitosan microspheres as adsorbents using standard Proteins (bovine serum albumin and lysozyme)
title_full_unstemmed Characterization of chemically modified chitosan microspheres as adsorbents using standard Proteins (bovine serum albumin and lysozyme)
title_sort Characterization of chemically modified chitosan microspheres as adsorbents using standard Proteins (bovine serum albumin and lysozyme)
author Torres,M. A.
author_facet Torres,M. A.
Beppu,M. M.
Santana,C. C.
author_role author
author2 Beppu,M. M.
Santana,C. C.
author2_role author
author
dc.contributor.author.fl_str_mv Torres,M. A.
Beppu,M. M.
Santana,C. C.
dc.subject.por.fl_str_mv Chitosan microspheres BSA lysozyme adsorption
topic Chitosan microspheres BSA lysozyme adsorption
description Chitosan microspheres with a mean size of 140 ± 119 µm were produced by the spray and coagulation methods. The microspheres were chemically modified using the following routes: a) crosslinking with glutaraldehyde b) crosslinking with epychlorohydrin and c) acetylation. For investigation of their ability as adsorbents, the following standard proteins were chosen as adsorbates: bovine serum albumin - BSA (pI = 4.8 and MW = 66 kDa) and lysozyme (pI = 11 and MW = 14 kDa). The adsorption experiments were performed using a static method. The adsorption media and equilibrium concentration of adsorbates were varied in the ranges of pH 4-11 and 0.07-0.70 mg.ml-1, respectively. The maximum adsorption capacities (q m) and the constant of the Langmuir model (Ks) were shown to be dependent on charge interactions and on the kind of treatment performed on chitosan microspheres. The satisfactory fit of a kinetic model to the experimental data shows that the step that controls the adsorption kinetics is probably the initial adsorbate transport.
publishDate 2007
dc.date.none.fl_str_mv 2007-09-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322007000300003
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322007000300003
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0104-66322007000300003
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Brazilian Society of Chemical Engineering
publisher.none.fl_str_mv Brazilian Society of Chemical Engineering
dc.source.none.fl_str_mv Brazilian Journal of Chemical Engineering v.24 n.3 2007
reponame:Brazilian Journal of Chemical Engineering
instname:Associação Brasileira de Engenharia Química (ABEQ)
instacron:ABEQ
instname_str Associação Brasileira de Engenharia Química (ABEQ)
instacron_str ABEQ
institution ABEQ
reponame_str Brazilian Journal of Chemical Engineering
collection Brazilian Journal of Chemical Engineering
repository.name.fl_str_mv Brazilian Journal of Chemical Engineering - Associação Brasileira de Engenharia Química (ABEQ)
repository.mail.fl_str_mv rgiudici@usp.br||rgiudici@usp.br
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