Lignin as natural radical scavenger. Study of the antioxidant capacity apple tree pruning lignin obtained by different methods

Giorgia Spigno, Danila Amendola, Garcia Araceli, Maria Gonzalez, Jalel Labidi

Risultato della ricerca: Contributo in libroContributo a convegno

Abstract

In the present work, the antioxidant activity of lignin obtained from apple tree pruning was studied. Different procedures were used in order to fractionate the raw material and extract the lignin (autohydrolysis, organosolv and soda processes) and several operation conditions, techniques and methodologies were applied (ultrafiltration and differential precipitation). The obtained lignin samples were characterized by ATR-IR spectroscopy and TGA techniques. Further analyses were done in order to determinate main components and total phenolic contents (Folin-Ciocalteau method). The antioxidant activity results (evaluated by ABTS assay) showed that: (1) the lignin obtaining process highly affects this property and (2) that the antiradical behaviour of lignin could reach similar efficiency than two powerful natural antioxidants, gallic acid and catechin, and a commercial one, Trolox®.
Lingua originaleEnglish
Titolo della pubblicazione ospiteChemical Engineering Transactions 24
Pagine925-930
Numero di pagine6
Stato di pubblicazionePubblicato - 2011
EventoICheaP-10 _ 10th International conference on chemical and process engineering - Firenze
Durata: 8 mag 201110 mag 2011

Convegno

ConvegnoICheaP-10 _ 10th International conference on chemical and process engineering
CittàFirenze
Periodo8/5/1110/5/11

Keywords

  • antioxidants
  • lignin
  • phenols

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