此研究探討表面素（surfactin）的表面張力下降能力、起泡能力、乳化能力及增溶效率等性質，並將表面素溶液用於移除填充管柱中的正十五碳烷，以評估表面素溶液應用於土壤復育的潛力。此外，也評估利用表面素/Triton X-100混合界面活性劑溶液，去除填充管柱中正十五碳烷的效果。
表面素的臨界微胞濃度大約是2×10-5 M，能使水的表面張力下降到30 mN/m。表面素溶液的起泡能力會隨濃度增加而上升，泡沫穩定性卻隨濃度增加而下降。含表面素之正十五碳烷/水乳液的穩定性，則隨表面素濃度增加而上升。此外，對於正十五碳烷而言，表面素的莫耳溶解比率（molar solubilization ratio, MSR）是0.42。若以水進行含正十五碳烷之填充管柱的淋洗，正十五碳烷的移除效率不到1 %。當使用濃度1×10-4～3×10-4 M的表面素溶液進行淋洗時，正十五碳烷的移除效率可提高十倍以上，但渠流效應造成移除效率變化很大。若採用表面素溶液生成的泡沫進行管柱淋洗實驗，因為渠流效應不再有明顯的影響，所以正十五碳烷的移除效率明顯提高。將表面素/Triton X-100混合界面活性劑應用於泡沫淋洗程序中，於填充管柱中移除正十五碳烷的效果則與單純使用表面素的效果類似。

This study investigated the surfactin properties, such as surface tension lowering ability, foamability, emulsification ability, and solubilization efficiency. Surfactin solutions were also used to remove n-pentadecane from a packed column in order to evaluate the potential of applying surfactin solutions to soil remediation. In addition, the efficiency for removing n-pentadecane from the packed column by using the mixed surfactin/Triton X-100 surfactant solutions was evaluated.
The critical micelle concentration of surfactin was about 2×10-5 M and the surface tension of water can be reduced to 30 mN/m by surfactin. The foamability of surfactin solutions was increased with the surfactin concentration, but the foam stability was decreased with the surfactin concentration. The stability of n-pentadecane/water emulsions containing surfactin was increased with the surfactin concentration. Moreover, for n-pentadecane, the molar solubilization ratio of surfactin was 0.42. When water was used to flush a packed column containing n-pentadecane, the removal efficiency for n-pentadecane was less than 1 %. The removal efficiency for n-pentadecane was increased more than ten times by using 1×10-4～3×10-4 M surfactin solutions in the flushing process. However, the channeling effect resulted in the pronounced variation in the efficiency for n-pentadecane removal. If the column flushing experiments were performed by using the foams of surfactin solutions, the removal efficiency for n-pentadecane was greatly increased because the channeling effect became insignificant. In the case of applying mixed surfactin/Triton X-100 surfactants in the foam flushing approach, the removal efficiency for n-pentadecane from the packed columns was similar to that obtained by applying surfactin only.

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