Document Detail


Adsorption studies of recalcitrant compounds of molasses spentwash on activated carbons.
MedLine Citation:
PMID:  16987542     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
S Figaro; S Louisy-Louis; J Lambert; J-J Ehrhardt; A Ouensanga; S Gaspard
Publication Detail:
Type:  Journal Article     Date:  2006-09-20
Journal Detail:
Title:  Water research     Volume:  40     ISSN:  0043-1354     ISO Abbreviation:  Water Res.     Publication Date:  2006 Oct 
Date Detail:
Created Date:  2006-10-02     Completed Date:  2006-12-12     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0105072     Medline TA:  Water Res     Country:  England    
Other Details:
Languages:  eng     Pagination:  3456-66     Citation Subset:  IM    
Affiliation:
Laboratoire COVACHIMM, EA 3592, Département de chimie, Université des Antilles et de la Guyane, BP 250, 97157 Pointe à Pitre Cedex. Guadeloupe, French West Indies.
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MeSH Terms
Descriptor/Qualifier:
Adsorption
Anaerobiosis
Bacteria, Anaerobic / growth & development
Charcoal / chemistry*
Molasses* / microbiology
Oxygen / chemistry*
Particle Size
Polymers / chemistry*
Tannins / chemistry*
Ultrafiltration
Water Purification / methods
Chemical
Reg. No./Substance:
0/Polymers; 0/Tannins; 0/melanoidin polymers; 16291-96-6/Charcoal; 7782-44-7/Oxygen

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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