Document Detail


Stabilization/solidification of acid tars.
MedLine Citation:
PMID:  20473807     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
This work involve a systematic treatability study of the treatment of acid tars (AT), a waste generated during the processing of petroleum and petrochemical, by stabilization/solidification with Portland cement (CEM I), with the addition of high carbon fly ash (HCFA), an industrial by-product, as a novel sorbent for organic contaminants. A factorial design experiment was adopted to investigate the effects of organic content, HCFA:AT ratio, percentage CEM I addition, and curing time on response variables including unconfined compressive strength (UCS), hydraulic conductivity, porosity, and leachability-related properties of the stabilized/solidified (s/s) products, and to assess management options for the s/s products based on performance criteria adapted from regulatory and other guidance. Results show that all studied factors had significant effects on the tested properties of the s/s products. Acid tar reduced UCS, but strength increase was observed with increased curing time. Increased HCFA addition led to an improvement in hydraulic conductivity. Assessment of management options indicates that the treated acid tars could find application as controlled low-strength materials, landfill liner, and landfill daily cover. The work demonstrates how a systematic treatability study can be used to develop a S/S operating window for management of a particular waste type.
Authors:
Sunday A Leonard; Julia A Stegemann
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering     Volume:  45     ISSN:  1532-4117     ISO Abbreviation:  J Environ Sci Health A Tox Hazard Subst Environ Eng     Publication Date:  2010  
Date Detail:
Created Date:  2010-05-17     Completed Date:  2010-08-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9812551     Medline TA:  J Environ Sci Health A Tox Hazard Subst Environ Eng     Country:  England    
Other Details:
Languages:  eng     Pagination:  978-91     Citation Subset:  IM    
Affiliation:
Department of Civil, Environmental and Geomatic Engineering, University College London, United Kingdom.
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MeSH Terms
Descriptor/Qualifier:
Adsorption
Carbon / chemistry
Construction Materials
Environmental Pollutants / chemistry*
Hydrogen-Ion Concentration
Industrial Waste*
Industry*
Particulate Matter / chemistry
Petroleum*
Tars / chemistry*
Waste Management / methods*
Chemical
Reg. No./Substance:
0/Environmental Pollutants; 0/Industrial Waste; 0/Particulate Matter; 0/Petroleum; 0/Tars; 68131-74-8/fly ash; 7440-44-0/Carbon

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


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