Cargando…

Evaluation of an Adsorbent Based on Agricultural Waste (Corn Cobs) for Removal of Tyrosine and Phenylalanine from Aqueous Solutions

Adsorption of phenolic amino acids, such as phenylalanine and tyrosine, is quite relevant for the production of protein hydrolysates used as dietary formulations for patients suffering from congenital disorders of amino acid metabolism, such as phenylketonuria. In this study, an adsorbent prepared f...

Descripción completa

Detalles Bibliográficos
Autores principales: Alves, Cibele C. O., Franca, Adriana S., Oliveira, Leandro S.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Hindawi Publishing Corporation 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3713363/
https://www.ncbi.nlm.nih.gov/pubmed/23936863
http://dx.doi.org/10.1155/2013/978256
_version_ 1782277186883944448
author Alves, Cibele C. O.
Franca, Adriana S.
Oliveira, Leandro S.
author_facet Alves, Cibele C. O.
Franca, Adriana S.
Oliveira, Leandro S.
author_sort Alves, Cibele C. O.
collection PubMed
description Adsorption of phenolic amino acids, such as phenylalanine and tyrosine, is quite relevant for the production of protein hydrolysates used as dietary formulations for patients suffering from congenital disorders of amino acid metabolism, such as phenylketonuria. In this study, an adsorbent prepared from corn cobs was evaluated for the removal of tyrosine (Tyr) from both a single component solution and a binary aqueous solution with phenylalanine (Phe). The adsorption behavior of tyrosine was similar to that of phenylalanine in single component solutions, however, with a much lower adsorption capacity (14 mg g(−1) for Tyr compared to 109 mg g(−1) for Phe). Tyr adsorption kinetics was satisfactorily described by a pseudosecond-order model as it was for Phe. In adsorption equilibrium studies for binary mixtures, the presence of Tyr in Phe solutions favored Phe faster adsorption whereas the opposite behavior was observed for the presence of Phe in Tyr solutions. Such results indicate that, in binary systems, Phe will be adsorbed preferably to Tyr, and this is a welcome feature when employing the prepared adsorbent for the removal of Phe from protein hydrolysates to be used in dietary formulations for phenylketonuria treatment.
format Online
Article
Text
id pubmed-3713363
institution National Center for Biotechnology Information
language English
publishDate 2013
publisher Hindawi Publishing Corporation
record_format MEDLINE/PubMed
spelling pubmed-37133632013-08-09 Evaluation of an Adsorbent Based on Agricultural Waste (Corn Cobs) for Removal of Tyrosine and Phenylalanine from Aqueous Solutions Alves, Cibele C. O. Franca, Adriana S. Oliveira, Leandro S. Biomed Res Int Research Article Adsorption of phenolic amino acids, such as phenylalanine and tyrosine, is quite relevant for the production of protein hydrolysates used as dietary formulations for patients suffering from congenital disorders of amino acid metabolism, such as phenylketonuria. In this study, an adsorbent prepared from corn cobs was evaluated for the removal of tyrosine (Tyr) from both a single component solution and a binary aqueous solution with phenylalanine (Phe). The adsorption behavior of tyrosine was similar to that of phenylalanine in single component solutions, however, with a much lower adsorption capacity (14 mg g(−1) for Tyr compared to 109 mg g(−1) for Phe). Tyr adsorption kinetics was satisfactorily described by a pseudosecond-order model as it was for Phe. In adsorption equilibrium studies for binary mixtures, the presence of Tyr in Phe solutions favored Phe faster adsorption whereas the opposite behavior was observed for the presence of Phe in Tyr solutions. Such results indicate that, in binary systems, Phe will be adsorbed preferably to Tyr, and this is a welcome feature when employing the prepared adsorbent for the removal of Phe from protein hydrolysates to be used in dietary formulations for phenylketonuria treatment. Hindawi Publishing Corporation 2013 2013-07-02 /pmc/articles/PMC3713363/ /pubmed/23936863 http://dx.doi.org/10.1155/2013/978256 Text en Copyright © 2013 Cibele C. O. Alves et al. https://creativecommons.org/licenses/by/3.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Alves, Cibele C. O.
Franca, Adriana S.
Oliveira, Leandro S.
Evaluation of an Adsorbent Based on Agricultural Waste (Corn Cobs) for Removal of Tyrosine and Phenylalanine from Aqueous Solutions
title Evaluation of an Adsorbent Based on Agricultural Waste (Corn Cobs) for Removal of Tyrosine and Phenylalanine from Aqueous Solutions
title_full Evaluation of an Adsorbent Based on Agricultural Waste (Corn Cobs) for Removal of Tyrosine and Phenylalanine from Aqueous Solutions
title_fullStr Evaluation of an Adsorbent Based on Agricultural Waste (Corn Cobs) for Removal of Tyrosine and Phenylalanine from Aqueous Solutions
title_full_unstemmed Evaluation of an Adsorbent Based on Agricultural Waste (Corn Cobs) for Removal of Tyrosine and Phenylalanine from Aqueous Solutions
title_short Evaluation of an Adsorbent Based on Agricultural Waste (Corn Cobs) for Removal of Tyrosine and Phenylalanine from Aqueous Solutions
title_sort evaluation of an adsorbent based on agricultural waste (corn cobs) for removal of tyrosine and phenylalanine from aqueous solutions
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3713363/
https://www.ncbi.nlm.nih.gov/pubmed/23936863
http://dx.doi.org/10.1155/2013/978256
work_keys_str_mv AT alvescibeleco evaluationofanadsorbentbasedonagriculturalwastecorncobsforremovaloftyrosineandphenylalaninefromaqueoussolutions
AT francaadrianas evaluationofanadsorbentbasedonagriculturalwastecorncobsforremovaloftyrosineandphenylalaninefromaqueoussolutions
AT oliveiraleandros evaluationofanadsorbentbasedonagriculturalwastecorncobsforremovaloftyrosineandphenylalaninefromaqueoussolutions