Document Detail


Characterization of humic substances in landfill leachate and impact on the hydraulic conductivity of geosynthetic clay liners.
MedLine Citation:
PMID:  19423593     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A detailed characterization was performed on the humic substances present in landfill leachate derived from the older (10-year) and younger (6-month) municipal landfill cells at a site in Inchion, Korea. The characterization focused on the humic and fulvic acid components of the leachate, relying on information gleaned from the UV/visible spectroscopy, molecular weight distribution, and Fourier transform infrared spectroscopy. The effect of the leachates, and specific components of the leachates, on the hydraulic conductivity of a geosynthetic clay liner (GCL), was evaluated. The humic acid extracted from the older leachate was composed primarily of high molecular weight and aromatic compounds, which is typical for humic acids. However, the humic acid extracted from the younger leachate showed characteristics more similar with fulvic acids, indicating that the younger humic acid was at the initial stage of humification. The hydraulic conductivity of the GCLs to the humic and fulvic acids of the older and younger leachate was similar to those permeated with the distilled deionized water (DI). However, the hydraulic conductivity of the samples tested with the raw leachate was more than 200 times the DI value. This fact suggests that cations present in leachate, rather than humic substances, are the key factor in the increase of the permeability.
Authors:
Young-Soo Han; Jai-Young Lee; Carol J Miller; Lance Franklin
Publication Detail:
Type:  Journal Article     Date:  2009-05-07
Journal Detail:
Title:  Waste management & research : the journal of the International Solid Wastes and Public Cleansing Association, ISWA     Volume:  27     ISSN:  0734-242X     ISO Abbreviation:  Waste Manag Res     Publication Date:  2009 May 
Date Detail:
Created Date:  2009-05-15     Completed Date:  2009-08-11     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9881064     Medline TA:  Waste Manag Res     Country:  England    
Other Details:
Languages:  eng     Pagination:  233-41     Citation Subset:  IM    
Affiliation:
Department of Civil and Environmental Engineering, The University of Michigan, Ann Arbor, Michigan, USA.
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MeSH Terms
Descriptor/Qualifier:
Aluminum Silicates*
Elements
Environmental Monitoring
Humic Substances / analysis*
Refuse Disposal / methods*
Spectrophotometry
Water*
Water Pollutants, Chemical / chemistry*
Chemical
Reg. No./Substance:
0/Aluminum Silicates; 0/Elements; 0/Humic Substances; 0/Water Pollutants, Chemical; 1302-87-0/clay; 7732-18-5/Water

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


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