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®.
|Title of host publication||Chemical Engineering Transactions 24|
|Number of pages||6|
|Publication status||Published - 2011|
|Event||ICheaP-10 _ 10th International conference on chemical and process engineering - Firenze|
Duration: 8 May 2011 → 10 May 2011
|Conference||ICheaP-10 _ 10th International conference on chemical and process engineering|
|Period||8/5/11 → 10/5/11|