Adsorption studies of recalcitrant compounds of molasses spentwash on activated carbons
| Autor: | J. Lambert, Jean-Jacques Ehrhardt, S. Louisy-Louis, A. Ouensanga, S. Figaro, Sarra Gaspard |
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| Rok vydání: | 2006 |
| Předmět: |
Environmental Engineering
Polymers Vinasse Ultrafiltration Water Purification Bacteria Anaerobic chemistry.chemical_compound Adsorption Tannic acid medicine Phenol Molasses Anaerobiosis Particle Size Waste Management and Disposal Effluent Water Science and Technology Civil and Structural Engineering Chromatography Ecological Modeling Chemical oxygen demand Melanoidin Pollution Oxygen chemistry Charcoal Tannins Nuclear chemistry Activated carbon medicine.drug |
| Zdroj: | Water Research. 40:3456-3466 |
| ISSN: | 0043-1354 |
| DOI: | 10.1016/j.watres.2006.07.037 |
| Popis: | Due to high levels of residual chemical oxygen demand (COD) in the effluent of molasses spentwash (MSW) after anaerobic treatment, acceptable COD levels for discharge cannot be achieved without some form of post-treatment. In this study, the particulate composition of molasses spentwash after anaerobic digestion (MSWD), is characterised as to its particle size distribution, using micro- and ultrafiltration and three activated carbons are characterised as to their ability to reduce significantly the COD of MSWD effluent. The activated carbons tested as adsorbent, were characterised by XPS spectroscopy, elemental analysis, surface area, pore size distribution, and acid-base titration using the Boehm's method. Adsorption of phenol, used here as a reference compound, and of some organic compounds contained in MSWD (gallic acid, tannic acid, and melanoidin, respectively), was studied. It was clearly demonstrated that an activated carbon with a significant distribution of both micropores and mesopores and a significant amount of macropores that are assumed to act as conduits providing access to micro- and mesopores, have a good adsorption efficiency for compounds such as tannic acid and melanoidins. It is a good adsorbent for melanoidin and coloured compounds of MSWD, which represents a large source of the aqueous pollution in sugar cane industries. |
| Databáze: | OpenAIRE |
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