二仁溪下游河段為台灣南部地區污染最嚴重之河段之一，其底泥中更富含歷年來累積而成之高濃度重金屬。本研究主要探討二仁溪底泥所馴養出之原生硫氧化菌在進行底泥中重金屬之生物淋溶時底泥中重金屬各鍵結形態之變化。結果顯示，利用逐步萃取的方法更清楚知道各個金屬鍵結的型態，如鎘跟鈷鍵結型態相似，主要是以碳酸鹽鍵結態和有機物鍵結態為主；鉻跟鐵相似，主要是以鐵氧化物鍵結態和有機物鍵結態為主；錳和鉛相似，主要是以鐵氧化物鍵結態、有機物鍵結態和碳酸鹽鍵結為主。 The aim of this study is to explore the variation of binding fractions of heavy metals in sediment during the bioleaching process of remediating the sediment contaminated with heavy metals. Results reveal that the variation of binding fractions of different metals was insignificant. Cadmium similar to cobalt, mainly bound to carbonates and organics; chromium similar to iron, mainly bound to Fe-oxides and organics; manganese similar to lead, mainly bound to Fe-oxides, organics and carbonates.
