震波激盪技術應用於地下水污染整治最佳化之理論探討

低頻震波激盪應用在含非混合流體流動的多孔介質邊界內，可藉以尋得地下水汙染之整治，其包含提高除去非水流體、增加石油取得或提高汙染物質析出。但值得注意的是，目前少有研究發表可提供量化的描述，來確定震波下非水流體流動與震波激盪刺激激發特性有關聯，可見以理論下模擬的研究較實驗結果缺乏。為解決這部分概念的缺漏，本研究根據Lo et al.（2005,2007）所發展的孔彈性理論，加入邊界條件，並代入相關孔隙介質的彈性參數和含有水及三氯乙烯兩相流體的水文參數，進行模擬計算與分析，並針對Carsel and Parrish（1988）提出的12種土壤參數進行模擬與探討分析，藉以了解不同土壤質地條件下，孔隙震波激盪對三氯乙烯的傳輸影響情形，並取得不同土壤介質對三氯乙烯傳輸之最佳震波頻率及傳輸趨勢。

關鍵字

震波激盪；孔彈性理論；汙染傳輸；地下水汙染整治

並列摘要

Seismic wave stimulation is emerging as an important technology with the capability of improving efficiency in extracting organic contaminants from aquifers. To understand and predict the behavior of immiscible fluids in a porous medium subject to stress pulsing at a boundary lag significantly behind the progress, a boundary-value problem was formulated to describe pore-pressure pulsing at seismic frequencies that was based on the continuum theory of poroelasticity for an elastic porous medium bearing two immiscible fluids. Numerical investigation was applied by using elasticity parameters and hydraulic data to simulate the stimulation-induced mobilization of trichloroethene (TCE) in water flowing through a compressed sand core. The optimum frequencies of seismic stimulation which enhance higher TCE concentration for 12 soil texture classes can be found. The results of sensitivity analysis indicate that bulk modulus and shear modulus of different soil textures dominate the optimum frequency of seismic stimulation.

並列關鍵字

Wave stimulation technology ； Theory of poroelasticity ； Contaminant transmission ； Contaminated groundwater remediation

國際替代計量

震波激盪技術應用於地下水污染整治最佳化之理論探討

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