隨著科技的進步，稀土元素的需求連年攀升，許多國家紛紛把礦物，尤其稀土礦物當作其戰略資源的一環，然而台灣沒有豐富的天然資源，為了獲得資源，從廢料中提取資源，透過新概念-“都市礦山”，的方式使資源達到永續發展。
本研究分為二部分，透過酸浸漬的方式可有效地從廢料中提取有價金屬，使用IRC748進行離子交換，在pH=2、稀釋一倍的情況下，從四元金屬溶液中，成功的吸附銅、鐵離子，使他與釤、鈷離子分離，在使用2N的硫酸脫附IRC748中的銅、鐵離子，其中銅離子回收率99.1%，鐵離子回收率99.7%。
透過第一階段的研究可獲得銅鐵二元溶液與釤鈷二元溶液，透過沉澱法將其再次分離，其中沉澱銅使用草酸，在pH=0.24下依然可作用，由於鐵會與草酸形成錯合物，使他溶解於溶液中，使銅可與鐵有效的分離，其中，在室溫下、草酸和銅離子莫爾比為10、2hr有最佳沉澱率98.6%，純度99.9%。使用氨水沉澱鐵，由於在少量氨水下金屬離子會因為氫氧根使溶液中的金屬離子形成金屬氫氧化物沉澱，但在過量氨水中氫氧化銅會與氨根錯和，使銅離子再次溶解在溶液中，其中在(Cu2++Fe3+)/NH4+=10時，有最佳沉澱率99.9%，純度99.9%。使用硫酸鈉當沉澱劑，因為與鑭系硫酸鹽晶形相似，因此共同沉澱，其中溫度80℃、1.5hr、硫酸鈉和釤離子莫爾比4，有最佳沉澱率99.7%，純度99.9%。為了使鈷離子得到更好的應用，因此再脫釤溶液中製作草酸鈷，使用草酸當沉澱劑，在pH=2、60℃、1hr、莫爾比為1時有最佳沉澱率99.6%，其純頓99.8%

With the advancement of science and technology, the demand for rare earth elements has been rising year after year. Many countries have regarded minerals, especially rare earth minerals, as part of their strategic resources. However, Taiwan does not have abundant natural resources. In order to obtain resources, they need to extract resources from waste materials. To achieve sustainable development. This research is divided into two parts. Valuable metals can be effectively extracted from waste materials through acid impregnation. IRC748 is used to adsorb copper and iron ions to separate them from samarium and cobalt ions. The use of ammonia to desorb copper and iron on resin Iron ion. Through the first stage of research, the binary solution of copper and iron and the binary solution of samarium and cobalt can be obtained. They are separated again by precipitation method. The precipitated copper uses oxalic acid, which can still work at pH=0.24, because iron will form a complex with oxalic acid. Compound, so that it can be dissolved in the solution, so that copper can be effectively separated from iron. Use ammonia water to precipitate iron, because metal ions in a small amount of ammonia water will cause metal ions in the solution to form metal hydroxide precipitates due to hydroxide, but in excess ammonia water, copper hydroxide will be mixed with ammonia, and copper ions will be dissolved again In the solution to achieve the effect of separation. Sodium sulfate is used as the precipitant, because it is similar in crystal form to the lanthanide sulfate, so it precipitates. In order to make better use of cobalt ions, oxalic acid is used as a precipitant, and then cobalt oxalate is produced in the de-samarium solution.

Keywords: Ion exchange,precipitation,samarium,cobalt,copper,iron

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