EVALUATION OF HEAVY METAL REMOVAL BY OXIDISED LIGNINS IN ACID MEDIA FROM VARIOUS SOURCES
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 pretreated cane bagasse, soda pulping bagasse, eucalypt Kraft lignin, and commercial Kraft lignin....
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
North Carolina State University
2008-11-01
|
| Series: | BioResources |
| Subjects: | |
| Online Access: | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/viewFile/BioRes_03_4_1092_Quintana_RGV_Eval_Heavy_Metal_Oxidized_Lignin/261 |
| _version_ | 1819134854087835648 |
|---|---|
| author | Germán C. Quintana George J. M. Rocha Adilson R. Gonçalves Jorge A. Velásquez |
| author_facet | Germán C. Quintana George J. M. Rocha Adilson R. Gonçalves Jorge A. Velásquez |
| author_sort | Germán C. Quintana |
| collection | DOAJ |
| description | 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 pretreated 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. |
| first_indexed | 2024-12-22T10:09:48Z |
| format | Article |
| id | doaj.art-928d9320ac11413097f623386698cf2f |
| institution | Directory Open Access Journal |
| issn | 1930-2126 |
| language | English |
| last_indexed | 2024-12-22T10:09:48Z |
| publishDate | 2008-11-01 |
| publisher | North Carolina State University |
| record_format | Article |
| series | BioResources |
| spelling | doaj.art-928d9320ac11413097f623386698cf2f2022-12-21T18:29:54ZengNorth Carolina State UniversityBioResources1930-21262008-11-013410921102EVALUATION OF HEAVY METAL REMOVAL BY OXIDISED LIGNINS IN ACID MEDIA FROM VARIOUS SOURCESGermán C. QuintanaGeorge J. M. RochaAdilson R. GonçalvesJorge A. VelásquezThe 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 pretreated 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.http://ojs.cnr.ncsu.edu/index.php/BioRes/article/viewFile/BioRes_03_4_1092_Quintana_RGV_Eval_Heavy_Metal_Oxidized_Lignin/261Adsorption IsothermsLignin oxidationBagasse ligninKraft ligninLignin characterization |
| spellingShingle | Germán C. Quintana George J. M. Rocha Adilson R. Gonçalves Jorge A. Velásquez EVALUATION OF HEAVY METAL REMOVAL BY OXIDISED LIGNINS IN ACID MEDIA FROM VARIOUS SOURCES BioResources Adsorption Isotherms Lignin oxidation Bagasse lignin Kraft lignin Lignin characterization |
| title | EVALUATION OF HEAVY METAL REMOVAL BY OXIDISED LIGNINS IN ACID MEDIA FROM VARIOUS SOURCES |
| title_full | EVALUATION OF HEAVY METAL REMOVAL BY OXIDISED LIGNINS IN ACID MEDIA FROM VARIOUS SOURCES |
| title_fullStr | EVALUATION OF HEAVY METAL REMOVAL BY OXIDISED LIGNINS IN ACID MEDIA FROM VARIOUS SOURCES |
| title_full_unstemmed | EVALUATION OF HEAVY METAL REMOVAL BY OXIDISED LIGNINS IN ACID MEDIA FROM VARIOUS SOURCES |
| title_short | EVALUATION OF HEAVY METAL REMOVAL BY OXIDISED LIGNINS IN ACID MEDIA FROM VARIOUS SOURCES |
| title_sort | evaluation of heavy metal removal by oxidised lignins in acid media from various sources |
| topic | Adsorption Isotherms Lignin oxidation Bagasse lignin Kraft lignin Lignin characterization |
| url | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/viewFile/BioRes_03_4_1092_Quintana_RGV_Eval_Heavy_Metal_Oxidized_Lignin/261 |
| work_keys_str_mv | AT germancquintana evaluationofheavymetalremovalbyoxidisedligninsinacidmediafromvarioussources AT georgejmrocha evaluationofheavymetalremovalbyoxidisedligninsinacidmediafromvarioussources AT adilsonrgoncalves evaluationofheavymetalremovalbyoxidisedligninsinacidmediafromvarioussources AT jorgeavelasquez evaluationofheavymetalremovalbyoxidisedligninsinacidmediafromvarioussources |