含水層的非水相液體 ( non-aqueous phase liquids，NAPLs)污染是一個普遍的環境問題。為確定NAPLs污染的風險並且設計合適的矯正方法，需知道在含水層中的NAPLs數量、分佈區域和組成。氡為一天然存在之放射性同位素，可用來當作分配示蹤劑(partitioning tracer)以調查受油品污染的含水層中NAPLs的存在。
本研究主要目的為利用液態閃爍計數法(liquid scintillation counting)，探討氡在油水兩相之分配行為。研究結果顯示：(1)氡在地下水中含量會隨著NAPLs在含水層多孔隙介質中的含油飽和度增加而減少，(2)地下水氡在不同油品分配係數(partition coefficient)與油品成份相關。

Non-aqueous phase liquids (NAPLs) are commonly found in aquifers at contaminated sites. In order to assess the risk of NAPLs contamination and design suitable correction measures at NAPL contamination sites, a sufficient identification of the distribution of NAPLs in the subsurface is required. Naturally occurring radon-222 gas in groundwater could be used as a partitioning tracer to detect non-aqueous phase liquids (NAPLs) in a contaminated aquifer.
The main purpose of this study is to investigate the partitioning behavior of groundwater radon in NAPLs using liquid scintillation counting method. The results of this study show: (1) in the presence of NAPLs, the groundwater radon concentration substantially declines as the dissolved radon preferentially partitions into the NAPL phase, and (2) the NAPL-water partition coefficient for groundwater radon depends on the NAPL composition.

吳春生，“以生物曝氣法整治受地下儲油槽洩漏之石化係有機污染物模場研究”，中山大學環境工程研究所碩士論文。2002。

莊淑蕙，“土壤有機質與水體酸鹼值對井間介入性示蹤劑試驗之影響”，中興大學環境工程研究所碩士論文。2000。

胡森，“油品污染大地散佈範圍之估算”，第四屆土壤污染防治研討會論文集”，pp.235-252，1993。

魏明通編著，“核化學”，五南圖書，2005。

邱志宏、黃正仲、陳宗哲、許坤澤、許俊男、游澄清諸，“實用游離輻射防護B”，財團法人中華民國輻射防護協會，2003。

經濟部能源委員會網頁，各月份各縣市加油站汽柴油銷售分析表，http://www.moeaec.gov.tw，2006。

經濟部能源委員會網頁，已核發經營許可執照之汽車加油站統計表，http://www.moeaec.gov.tw，2006。

Davis, B. M., J. D. Istok, and L. Semprini, “Numerical simulations of radon as an in situ partitioning tracer for NAPL quantifying contamination using push–pull tests.” Journal of Contaminant Hydrology, 78, 87– 103, 2005.

Davis, B.M., J. D. Istok, and L. Semprini, “Push–pull partitioning tracer tests using radon-222 to quantify nonaqueous phase liquid contamination.” Journal of Contaminant Hydrology, 58, 129–146, 2002.

Feenstra, S. and J. A. Cherry, “Subsurface contamination by dense non-aqueous phase liquids (DNAPL) chemicals,” Pap. Presented at Int. Groundwater Symp., Int. Assoc. Hydrogeol., Halifax, N. S., May1-4, 1988.

Huling, S. G., and W. W. James, “Dense Nonaqueous Phased Liquids,” Ground Water Issue, EPA/540/4-91-002, U.S.EAP, R.S. Kerr Environ. Res. Lab., Ada, OK., 1991.

Hunkeler, D., E. Hoegn, P. Höhener, and J. Zeyer, “222Rn as a Partitioning Tracer To Detect Diesel Fuel Contamination in Aquifers: Laboratory Study and Field Observations.” Environmental Science and Technology, 31, 3180-3187, 1997.

Jin, M., “A study nonaqueous phase liquids characterization and surfactant remediation,” Ph.D. Dissertation, The university of Texas at Austin, 1995.
Newell, C. J., S. D. Acree, R. R. Ross, and S. G. Huling, “Light Nonaqueous Phased Liquids,” Ground Water Issue, EPA/540/S-95/500, U.S.EAP, R.S. Kerr Environ. Res. Lab., Ada, OK., 1995.

Pope, G. A., M. Jin, V. Dwarakanath, B. Rouse, and K. Sepehrnoori, “Partitioning tracer test to characterize organic contaminants,” Proceedings of the Second Tracer Workshop, pp. 14-15, 1994.

Schubert, M., K. Freyer, H. C. Treutler, and H. Weiss, “Using radon-222 in soil gas as an indicator of subsurface contamination by non-aqueous phase-liqquids(NAPLs).” In: Wickramanayake, G.B., Hinchee, R.E. (Eds.), Nonaqueous-Phase Liquids. Battelle Press, Columbus, OH, pp. 137– 142, 1998.

Semprini, L., M. Cantaloub, S. Gottipati, O. Hopkins, and J. Istok, “Radon-222 as a tracer for quantifying and monitoring NAPL remediation.” Geofisica Internacional, Vol. 41, pp. 433-437, 2002.

Wang, P., V. Dwarakanath, B. A. Rouse, G. A. Pope, and K. Sepehrnoori, “Partition coefficients for alcohol tracers between nonaqueous-phase liquids and water from UNIFAC-solubility method,” Advances in Water Resources ,21, No. 2, pp.171-181, 1998.