膨潤土布在淡水、海水環境交互變異下之
止水成效與微觀特性研究

膨潤土防水毯(GCL)應用於工程上常利用膨潤土吸水膨脹能力，來減少液體滲流通過，在全球水資源正面臨嚴重不足的今天，保育及開發水資源並有效利用刻不容緩。而水資源貯蓄及地下水污染防制工程中，採用適當的阻水材料也直接影響其工程效果以達到防滲阻水（Hydraulic Barrier）的目的，現今應用上有廢棄物掩埋場、水庫、人工水塘或其他防滲阻水的工程中。由於膨潤土防水毯應用於一般自來水的阻水成效相當良好，也使用多年，但現今已有許多工程往沿海發展，但海水中含複雜之金屬陽離子，高價陽離子對於膨潤土內鈉離子的取代，將影響膨潤土防水毯的工程性質，故本研究將針對自來水飽和海水滲透後，觀察膨潤土吸水膨脹能力、礦物結構特性及膨潤土防水毯之阻水效果與離子含量之變異進行探討。研究結果得知，膨潤土防水毯在自來水環境下具有相當程度的阻水能力，但若利用海水進行滲透，阻水效果明顯降低，膨潤土本身之含水量及膨脹性大大降低， X 光繞射分析觀察晶格距離結果映證，高價陽離子的交換造成離子晶格的改變，並由原子吸收光譜比對海水及滲出液，滲出液中之鈉離子含量將因離子取代的而上升。

關鍵字

膨潤土防水毯；離子交換；原子吸收光譜； X 光繞射分析

並列摘要

Geosynthetic Clay Liners (GCLs) usually apply to the project is utilize it absorb water of expand ability,to reduce the liquid ooze,today global water resource is serious insufficient,child care and effectively utilize water resource is very urgency.In water resource stored and the pollution defended of underground water,adopt adaptable blocking water material directly influence fruitage of the Hydraulic Barrier.And now it used in Landfill、 reservoir、artifact water hole and other project of hydraulic barrier. As a result of the GCLs apply used in tap water is fruitage and used it for many years.Now many project is advance along the coast,but the seaweater is include complex cation,and high cvalue ation replace the sodium ation will influence it engineering quality.So in this study will permeate with water and osmosis with seawater,observe it absorb water of expand ability 、mineral structure characteristic、Hydraulic Barrier fruitage of GCLs and to discuss the variation of cation capacity. According to this research，GCLs have very well hydraulic barrier ability with the water environment,but with seaweater the Moisture content and expand of GCLs will be decrease and to lose hydraulic barrier obviously.As the result of X-rays diffraction analysis the distance mineral lattice.The high cvalue ation replace to cause the distance mineral lattice increase,and by Atomic Geosynthetic Clay Liners (GCLs) usually apply to the project is utilize it absorb water of expand ability,to reduce the liquid ooze,today global water resource is serious insufficient,child care and effectively utilize water resource is very urgency.In water resource stored and the pollution defended of underground water,adopt adaptable blocking water material directly influence fruitage of the Hydraulic Barrier.And now it used in Landfill、 reservoir、artifact water hole and other project of hydraulic barrier. As a result of the GCLs apply used in tap water is fruitage and used it for many years.Now many project is advance along the coast,but the seaweater is include complex cation,and high cvalue ation replace the sodium ation will influence it engineering quality.So in this study will permeate with water and osmosis with seawater,observe it absorb water of expand ability 、mineral structure characteristic、Hydraulic Barrier fruitage of GCLs and to discuss the variation of cation capacity. According to this research，GCLs have very well hydraulic barrier ability with the water environment,but with seaweater the Moisture content and expand of GCLs will be decrease and to lose hydraulic barrier obviously.As the result of X-rays diffraction analysis the distance mineral lattice.The high cvalue ation replace to cause the distance mineral lattice increase,and by Atomic Absorption Spectrophotometer Analysis with seawater and oozed.The sodium cation content in ooze is increase by high cvalue ation replace.

並列關鍵字

GCLs ； Anion Exchange ； X-ray Diffraction Analysis ； Atomic Absorption Spectrophotometer

參考文獻

【33】施茂瑜，「凍融循環對膨潤土布的滲透性影響」，中原大學土

【26】張家瑋，「滲流種類對膨潤土布自癒能力之影響」，中原大學

【14】 Robert M.Koerner, Erwin Gartung & H.Zanzinger “Geosynthetic

【2】 Roland Pusch &Raymond N. Yong ,”Microstructure of Smectite

【27】 Charles D. Shackelford, “Evaluating the hydraulic conductivity of

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膨潤土布在淡水、海水環境交互變異下之止水成效與微觀特性研究

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