Stability of organic matter in landfill leachates

Samples of grossly polluted groundwater and of leachate collected from wells or underdrains near solid waste disposal sites were subjected to extensive organic analyses. The soluble organics were concentrated, separated and characterized by membrane ultrafiltration, gelpermeation chromatography and...

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Bibliographic Details
Published in:Water research (Oxford) 1977, Vol.11 (2), p.225-232
Main Author: Chian, E.S.K.
Format: Article
Language:English
Subjects:
groundwater contamination
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Summary:Samples of grossly polluted groundwater and of leachate collected from wells or underdrains near solid waste disposal sites were subjected to extensive organic analyses. The soluble organics were concentrated, separated and characterized by membrane ultrafiltration, gelpermeation chromatography and analysis for functional groups and specific organics. Free volatile fatty acids represented the largest group of organics, and this fraction showed a rapid decrease with increasing age of the fill. The most stable group of organics with increasing age was a fulvic-like material with a relatively high carboxyl and aromatic hydroxyl group density. Increasing stability was further noted for carbohydrates, hydrolyzable amino acids and aromatic hydroxyl compounds in that order. Only leachate from a recently generating fill can be treated successfully by microbial processes because of its large biodegradable organic content; leachate from stabilized landfills is best treated by physical-chemical processes.
ISSN:0043-1354
1879-2448
DOI:10.1016/0043-1354(77)90130-0