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Effect Of Variable-Ph Landfill Leachate On A Carbonate Rock Aggregate, William L. Niemann, Allen W. Hatheway
Effect Of Variable-Ph Landfill Leachate On A Carbonate Rock Aggregate, William L. Niemann, Allen W. Hatheway
Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works
Carbonate rock aggregate is commonly used as drainage stone in leachate collection systems of RCRA Subtitle D landfills. U.S. EPA technical guidance for waste containment facilities states that excessive carbonate in drainage stone may result in dissolution and clogging at sites of reprecipitation (Daniel and Koerner, 1993, p. 197). Unfortunately, this theoretical concern does not appear to be confirmed by any experimental evidence with typical landfill leachate or documented instances of clogging at typical Subtitle D landfills. This paper describes a practical laboratory experiment that measured the effects of landfill leachate - maintained at three distinct pH levels - on …