TY - JOUR
T1 - Evaluation of heavy metal removal by oxidised lignins in acid media from various sources
AU - Quintana, Germán C.
AU - Rocha, George J.M.
AU - Gonçalves, Adilson R.
AU - Velásquez, Jorge A.
PY - 2008/11
Y1 - 2008/11
N2 - The capacity for removal of heavy metals from liquid streams by formation of complexes with lignins oxidized by acid treatment was studied. Lignins were obtained from different sources: sulfuric acid pre-treated cane bagasse, soda pulping bagasse, eucalypt Kraft lignin, and commercial Kraft lignin. These lignins were characterized using different techniques to determine Klason lignin, carbohydrates, total acids, ashes, and their main functional groups: phenolic-OH, carbonyls, etc. The studied lignins were determined spectroscopically using FTIR. In order to increase the metal adsorption capacity, lignins were oxidized at 100°C during 2 h, using aqueous solutions of H2O2 in distilled water solvent and HCl catalyst. Some lignin adsorption isotherms were constructed before and after the oxidation process to define Cd(II) ion removal capacity.
AB - The capacity for removal of heavy metals from liquid streams by formation of complexes with lignins oxidized by acid treatment was studied. Lignins were obtained from different sources: sulfuric acid pre-treated cane bagasse, soda pulping bagasse, eucalypt Kraft lignin, and commercial Kraft lignin. These lignins were characterized using different techniques to determine Klason lignin, carbohydrates, total acids, ashes, and their main functional groups: phenolic-OH, carbonyls, etc. The studied lignins were determined spectroscopically using FTIR. In order to increase the metal adsorption capacity, lignins were oxidized at 100°C during 2 h, using aqueous solutions of H2O2 in distilled water solvent and HCl catalyst. Some lignin adsorption isotherms were constructed before and after the oxidation process to define Cd(II) ion removal capacity.
KW - Adsorption Isotherms
KW - Bagasse lignin
KW - Kraft lignin
KW - Lignin characterization
KW - Lignin oxidation
UR - http://www.scopus.com/inward/record.url?scp=77349121896&partnerID=8YFLogxK
M3 - Artículo en revista científica indexada
AN - SCOPUS:77349121896
SN - 1930-2126
VL - 3
SP - 1092
EP - 1102
JO - BioResources
JF - BioResources
IS - 4
ER -