Document Detail


Sewage sludge-based adsorbents: a review of their production, properties and use in water treatment applications.
MedLine Citation:
PMID:  19375772     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The imposition of more stringent legislation governing the disposal and utilisation of sewage sludge, coupled with the growth in its generation and the loss of traditionally accepted disposal routes, has prompted a drive for alternative uses for sewage sludge. One option that exhibits special promise, due to its potential to valorise the sludge, is the conversion of the sludge into adsorbents. This paper seeks to review the published research in this field: it covers the means of production, the characteristics and the potential applications of sewage sludge-based adsorbents (SBAs). The literature has indicated that chemical activation utilising alkali metal hydroxides is the most effective technique for producing high surface area SBAs. In addition, acid washing is highly effective at raising the BET surface area of SBAs, especially when coupled with physical activation. Due to their relatively low microporosity, the phenol uptake of SBAs produced by physical activation is low, but through a combination of their favourable surface chemistry and relatively high mesoporosity, the best of these adsorbents can attain high uptakes of organic dyes. The SBAs produced by carbonisation, through their high cation exchange capacity, generally exhibit a high metal cation capacity. For further research, the following investigations are recommended: the utilisation of alternative chemical activation reagents; the optimisation of the most effective chemical activation techniques; the combined utilisation of different activation and surface chemistry modification techniques to produce application-specific adsorbents.
Authors:
K M Smith; G D Fowler; S Pullket; N J D Graham
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Review     Date:  2009-03-10
Journal Detail:
Title:  Water research     Volume:  43     ISSN:  0043-1354     ISO Abbreviation:  Water Res.     Publication Date:  2009 Jun 
Date Detail:
Created Date:  2009-05-22     Completed Date:  2009-07-29     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0105072     Medline TA:  Water Res     Country:  England    
Other Details:
Languages:  eng     Pagination:  2569-94     Citation Subset:  IM    
Affiliation:
Department of Civil and Environmental Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, United Kingdom. kmsmith@imperial.ac.uk
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MeSH Terms
Descriptor/Qualifier:
Adsorption
Charcoal / chemistry
Sewage / chemistry*
Waste Disposal, Fluid / methods*
Water Purification / methods*
Chemical
Reg. No./Substance:
0/Sewage; 16291-96-6/Charcoal

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


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