本研究針對海水淡化產生之廢鹵水進行金屬資源再生研究，實驗主要分為四部分。第一部分為海水與海水淡化廢鹵水的特性分析，此步驟藉由化學組成分析做為後續研究規劃的依據，並於第二部分的除鉀程序中以加熱蒸發及選擇性化學沉澱法去除鹵水中的鈣、鎂、鉀，以形成飽和鹵水。其中，透過選擇性沉澱可減少鉀離子於溶媒萃取階段及銣銫產物析出階段造成的負面影響。此步驟最佳參數為添加過氯酸於鹵水中，且調整pH值至pH 2，使過氯酸鉀沉澱率達到98.5%。
第三部分為金屬分離純化，主要方法為透過溶媒萃取進行金屬分離，並使用分離係數(Separation factor)、分配比(Distribution ratio)及萃取效率做為指標數據。實驗首先利用t-BAMBP進行第一階段萃取，使銫被選擇性萃取至有機相中，鋰、鈉、鉀、鈣、鎂、銣則留在水相，有機相中銫離子再藉由氨水反萃取至水溶液中。第二階段萃取仍使用t-BAMBP及氨水進行萃取與反萃取，將銣與鋰、鈉、鉀、鈣、鎂分離。透過兩階段溶媒萃取不僅可將銣、銫與雜質分離，也能使物理化學性質相近的銣、銫於後續步驟單獨形成化合物。此階段，銫的萃取及反萃取效率分別為：99.9%及97.8%；銣的萃取及反萃取效率則為：98.3%及95.1%。
第四部分為銣、銫產物析出。由於銣、銫化合物中，氯化銣及氯化銫具有高穩定性及高應用價值，因此本研究透過添加鹽酸於銣、銫反萃取液至pH 7，再經由減壓濃縮法來獲取氯化銣及氯化銫。兩者純度分別為：98.1%及99.0%。

50 billion cubic meters of brine every year makes ecological hazards to the environment and makes us need to reduce it. In this experiment, the main impurities which needed to be eliminated in brine were lithium, sodium, potassium, calcium and magnesium. In the procedure, brine was evaporated first to turn into saturated brine. Perchloric acid was then added into saturated brine to precipitate potassium perchlorate which could reduce the influence of potassium in the extraction procedure. After that, t-BAMBP and ammonia were separately used as extractant and stripping agent in the extraction procedure and stripping procedure to get rubidium hydroxide solutions and cesium hydroxide solutions. Subsequently, they reacted with hydrochloric acid to get rubidium chloride and cesium chloride. In a nutshell, this study mainly shows the optimal parameters of pH value to precipitate potassium perchlorate. Besides, solvent extraction step about pH value in the system, the concentration of t-BAMBP and ammonia, O/A ratio, reaction time and reaction temperature were also investigated to get the purities about 98.1% and 99.0% of rubidium chloride and cesium chloride.

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