摘要
本研究使用自行合成的不溶性澱粉黃酸鹽(Insoluble Starch Xanthate，ISX)來去除溶液中之銅離子，依適當銅硫比(1：1，1：2，1：4)添加ISX 於含銅溶液中，探討在不同條件（pH 值、ORP、離子強度）下，ISX 去除銅離子之效率。此外，將生成物Cu-ISX 置於特定環境中(酸性、鹼性、氧化、高溫等狀態)，搭配銅管／銅網陰極電解回收處理，並輔以液相pH、ORP、EC、金屬離子分析，固相FTIR、元素分析，期能了解溶出回收銅之效果與行為。

去除實驗結果顯示，銅硫比1：2 時，ISX 去除銅離子效果最佳，去除效果可達100%，而低pH 值及高氧化態條件下，去除效果不佳，；離子強度則對去除效果無顯著之影響。溶出/電解回收實驗結果則顯示，高濃度氧化劑有利於銅溶出；高pH 值有利於銅管陰極回收銅(初始pH=12 時，其回收率分別為電流密度2.5mA/cm2：49.2%；電流密度5mA/cm2：74%；電流密度10mA/cm2：82.8%)；低pH 及高溫條件下則銅網電解回收銅表現較佳(初始pH=2 時，其回收率分別為電流密度2.5mA/cm2：72.7%；電流密度5mA/cm2：80.4%；電流密度10mA/cm2：85.9%；控制溫度為50℃時，其回收率分別為電流密度2.5mA/cm2：52%；電流密度5mA/cm2：73.7%；電流密度10mA/cm2：83.1%)。由上述結果可知，ISX 具有特定之去除/溶出金屬離子特性，搭配電解回收處理及選擇適當操作條件，應可應用於含金屬廢水之處理及回收，而有別於傳統化學混凝沉澱程序。

Abstract
In this research, insoluble starch xanthate (ISX) was synthesized and was used for Cu(II) removal from aqueous solutions. Effects of initial metal ion concentration, pH, ionic strength and metal/sulfur (xanthate) molar ratio were investigated in batch modes. Results of Cu(II) removal experiments showed that the optimum Cu/sulfur molar ratio is 2. Low pH and high oxidation conditions appeared to reduce the Cu(II) removal efficiency. The ionic strength condition would not affect the performance of the Cu(II) removal process.
Recovery of Cu from the reactants, Cu-ISX, electrolysis under specific conditions (pH, ORP, temperature and current density) was performed in order to obtain the optimum
operating factors. Results of electrolysis experiments showed that high pH and electrolysis current density promoted Cu recovery efficiencies when column-type electrode was used (max. Cu recovery efficiency: 82.8%). Low pH, high temperature and high electrolysis current density were good for Cu recovery when net-type electrode was used (max. Cu From the above results, it was concluded that copper removal by ISX in combination with electrolysis recovery treatment could be a suitable method for solving copper-containing wastewaters and subsequent copper recovery problems.

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