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Polyphenol polymerization by horseradish peroxidase for metal adsorption studies / Hidetaka Kawakita in Industrial & engineering chemistry research, Vol. 48 N° 9 (Mai 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 9 (Mai 2009) . - pp. 4440–4444 Titre : Polyphenol polymerization by horseradish peroxidase for metal adsorption studies Type de document : texte imprimé Auteurs : Hidetaka Kawakita, Auteur ; Kohshi Hamamoto, Auteur ; Keisuke Ohto, Auteur Année de publication : 2009 Article en page(s) : pp. 4440–4444 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Polyphenol  Horseradish  peroxidase  reaction  Fourier  transform  infrared  spectrometry  Size-exclusion  chromatography  Metal  adsorption Résumé : Four phenol derivatives (m-cresol, 3-methylcatechol, 4-methylcatechol, and 4-ethylcatechol) were polymerized using the horseradish peroxidase reaction, and their metal adsorption capabilities were studied. Fourier transform infrared (FT-IR) spectrometry and size-exclusion chromatography indicated that the phenol monomers polymerized to give polyphenols having molecular weights from 700 to 3000. During metal adsorption studies, poly(3-methylcatechol) adsorbed copper ions at 100% in a solution of pH 5.0, whereas poly(m-cresol) failed to adsorb any copper ions. Gold ions selectively adsorbed to poly(4-ethylcatechol) in acid media and formed gold particles via reduction of the polyphenol. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800830m [article] Polyphenol polymerization by horseradish peroxidase for metal adsorption studies [texte imprimé] / Hidetaka Kawakita, Auteur ; Kohshi Hamamoto, Auteur ; Keisuke Ohto, Auteur . - 2009 . - pp. 4440–4444. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 9 (Mai 2009) . - pp. 4440–4444 Mots-clés : Polyphenol  Horseradish  peroxidase  reaction  Fourier  transform  infrared  spectrometry  Size-exclusion  chromatography  Metal  adsorption Résumé : Four phenol derivatives (m-cresol, 3-methylcatechol, 4-methylcatechol, and 4-ethylcatechol) were polymerized using the horseradish peroxidase reaction, and their metal adsorption capabilities were studied. Fourier transform infrared (FT-IR) spectrometry and size-exclusion chromatography indicated that the phenol monomers polymerized to give polyphenols having molecular weights from 700 to 3000. During metal adsorption studies, poly(3-methylcatechol) adsorbed copper ions at 100% in a solution of pH 5.0, whereas poly(m-cresol) failed to adsorb any copper ions. Gold ions selectively adsorbed to poly(4-ethylcatechol) in acid media and formed gold particles via reduction of the polyphenol. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800830m