Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/5141
標題: 操作條件對井間介入性示蹤劑試驗影響之研究
A study of the influence of operation condition to partitioning interwell tracer test
作者: 吳國宇
Wu, Kuo-Yu
關鍵字: 非水相液體;NAPL;示蹤劑;井間介入性示蹤劑試驗(PITT);tracer;PITT
出版社: 環境工程學系
摘要: 
近年來台灣發生了各式各樣之環境污染問題,其中經由輸送管線洩漏所造成的油品污染問題更是層出不窮,此類油品多屬於LNAPLs(Light Nonaqueous Phase Liquids),具有比重比水小、低溶解度以及高表面張力等特性,造成整治復育的效果不佳。而在整治復育之首要工作即是準確的偵測出污染物之所在位置,目前針對於NAPLs範圍特性的各偵測方法中,以井間介入性示蹤劑試驗( Partitioning Interwell Tracer Test,簡稱:PITT)受到的限制較少,準確度較高,於是本研究採用此方法作為研究方法。
PITT之偵測方式係將示蹤劑以少量的方式加入流體中,藉由流體的流動追蹤污染物之存在範圍且不會影響流體之物理特性,接著由數學模式計算出污染物之殘留飽和度。
本研究選取了一個非介入性示蹤劑以及四個介入性示蹤劑,總共五種示蹤劑進行一系列之管柱試驗,並分析在不同之示蹤劑流量及不同之孔隙率之情形下,對於PITT試驗之影響,而實驗之結果顯示,各示蹤劑在低流量進行PITT試驗會有較佳之推估結果,而在高流量之PITT試驗,則會有較大之誤差率產生。而在不同之孔隙率方面,由實驗結果顯示,不同之孔隙率,對於PITT試驗之推估結果影響並不明顯。

Recently, many pollution problems caused by leakage, spills and disposal of oils from underground storage tanks and pipelines have been found in Taiwan. Such light nonaqueous phase liquids (LNAPLs) have properties of high surface tension and low dissolubility. Investigating the existence and estimating the residual saturation of LNAPLs are the first steps for remediation of the suspected contaminated sites. Partitioning interwell tracer test (PITT) is one of the most competitive technologies for the evaluation work mentioned above.
This study employed PITT to detect and estimate the residual saturations of diesel in the sand-packed columns. One non-partitioning tracer and four partitioning tracers were used in a series of column tests to analyze the influence of tracer flow rates and porous media porosities to the results of PITT. The results of the column tests show that the estimations of diesel residual saturations in low flow rates by PITT are more accurate than those in high flow rates, especially for tracers with larger partitioning coefficients. However, the influence of porosity is not significant.
URI: http://hdl.handle.net/11455/5141
Appears in Collections:環境工程學系所

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