底渣實場應用之監測與半揮發性有機物檢測

Abstract

隨著環保技術的演進，廢棄物的處理方式已由傳統的掩埋法轉為焚化處理。本研究 針對焚化底渣再生製成的底渣骨材為研究對象，追蹤偵測底渣骨材再生使用對環境 的長期性影響、底渣骨材的基本特性及水洗試驗的溶出特性。再生影響中顯示氯鹽 及溶出性有機物在初期會有大量溶出的情形，隨使用時間增加、溶出量已減少並漸 漸趨於穩定。底渣基本特性檢測顯示底渣再生之流程具有足夠的能力使重金屬形成 穩定化合物並減少重金屬的溶出量。水洗的溶出特性顯示溶解性有機物及重金屬會 在低液固比時溶出量減低，應是受到水洗液中氯鹽濃度提高而抑制溶出。水溫部分 對於高液固比的水洗實驗有較大的影響。但整體而言仍以20℃液固比20 的條件對 去除有機物、氯鹽及重金屬有最好的效果。在水洗液的半揮發性有機物檢測中，測 得triphenylphosphine oxide 出現於目前所有的樣品中。

In this study, we evaluate the safety from monitoring of a road application with incineration bottom ash. On the environmental monitoring of road application, there are high concentrations of dissolved organic carbon and chloride in sample at first. Despite the concentration reduce after three years, the construction of chemical bonding may become unstable because of low pH value. The elemental properties of bottom ash show the reprocessing of bottom ash has good ability in fixing heavy metal with stable chemical bonding. The water washing experiments showed a low concentration of dissolved organic carbon and heavy metals in low liquid to solid ratio. We also detect the triphenylphosphine oxide in water washing process in all samples.