Decoloración de alginato de sodio extraído de las algas pardas marinas del género Sargassum con el uso de peróxido de hidrógeno

Química Nova

Erik L. Regalado²  Abilio Laguna²  Mabel Torres¹  Juan D. Sabatier¹  Margarita Hernández¹  Anselmo E. Ferrer¹  Clara Nogueiras¹ 

[1] ,Ministerio de Ciencia Tecnología y Medio Ambiente Centro de Bioactivos Marinos Ciudad Habana,Cuba

关键词: bleaching;    sodium alginate;    Sargassum;   

DOI  :  10.1590/S0100-40422007000100002

来源: SciELO

【 摘 要 】

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.

【 授权许可】

CC BY-NC   
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