Effectiveness of boring technique for examining stabilization of landfill

概要

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Since 1995, We carried out collection of disposal solid wastes by boring technique with improved core tube. The main results of observation and analyses for core samples were as follows.1) The methane which generated by fermentation and decomposition of organic waste was captured within soil layer covered waste. That methane obstructed growth of a plant on the soil layer.2) The fragments of wood, paper and textile in the core were not altered apparently. However, the pore within the layer consisted of such fragments were filled with methane.3) Some metals in the core sample have been glossy yet. Namely, it was clear that the internal condition of the landfill was anaerobic.4) Incinerator ashes contained Halite, Sylvite, Hydrocalumite and Lime mainly. Those components were disappeared by leaching and dissolution.5) Major ions in leachate consisted of Na+, K+, Mg2+, Ca+, NH4+, C1-, HCO3-, SO42- and toxic heavy metals were not detected in leachate. Electric conductivity of leachate was related closely to chloride ion.6) Plasticizers in disposal plastics were stored in the landfill, and a portion of plasticizers was leached into the leachate.
社団法人環境科学会の論文