Bleaching of sodium alginate from the brown seaweeds Sargassum with hydrogen peroxide

Autor:	Erik L. Regalado, Clara Nogueiras, Margarita Hernández, Juan D. Sabatier, Mabel Torres, Abilio Laguna, Anselmo E. Ferrer
Jazyk:	Spanish; Castilian
Rok vydání:	2007
Předmět:	biology Chemistry Vapor pressure osmometry Sargassum General Chemistry bleaching biology.organism_classification sodium alginate chemistry.chemical_compound Dry weight Yield (chemistry) Botany Hydrogen peroxide Nuclear chemistry Sodium alginate
Zdroj:	Química Nova v.30 n.1 2007 Química Nova Sociedade Brasileira de Química (SBQ) instacron:SBQ Química Nova, Volume: 30, Issue: 1, Pages: 5-8, Published: FEB 2007
Popis:	Hydrogen peroxide bleaching of sodium alginate from seaweeds oh the Sargassum genus was studied. The influence of H2O2 concentration (percentage of H2O2 on a dry weight alginate basis, w/w) and NaOH/H2O2 ratio (% NaOH/% H2O2, both referred to a dry weight alginate basis, w/w) on the molecular weight, color removal and content of Fe3+ ions of bleached alginate samples was investigated by UV and IR spectroscopies, colorimetric determination of Fe3+ ions and vapor pressure osmometry. Higher yield, purity and molecular weight of alginate were obtained using 3% (or less) of hydrogen peroxide and a NaOH/H2O2 ratio of 1.2 for bleaching.
Databáze:	OpenAIRE
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