本研究探討利用廢觸媒吸附水中銅、鋅及鎘離子之可行性，使用的吸附劑包括中油大林廠廢觸媒、高雄廠廢觸媒及大林廠新鮮觸媒。所有吸附劑進行相關實驗前皆經105℃溫度烘乾去除水份，再進行恆溫吸附試驗。探討的吸附反應實驗項目包括：振盪時間、金屬離子濃度、吸附劑量、溫度，並計算廢觸媒對水中金屬離子之單位吸附量。最後，將吸附的實驗數據代入恆溫吸附模式中，以探討實驗數據對吸附模式模擬的適用性。 實驗結果顯示在pH5.5下，大林廠廢觸媒對初始濃度為10-4M之三種金屬離子吸附去除率皆可達90%以上，高雄廠廢觸媒對三種金屬吸附去除率，除了鋅較低，只有60%以外，其餘銅、鎘吸附去除率皆可達80%以上。但廢觸媒對於較高金屬濃度則吸附去除率不佳，約為20~60%。三種金屬以銅去除率最高，鋅去除率最低。從反應熱判斷，吸附反應可能為物理性吸附,主要去除機制為靜電吸引。吸附行為可用Langmuir等溫吸附加以描述，吸附反應則呈現一階動力模式，且吸附量隨溫度上升而增加。 關鍵字：廢觸媒；吸附；Langmuir等溫吸附。 The adsorption of copper(Ⅱ), zinc(Ⅱ) and cadmium(Ⅱ) from aqueous solution with spent catalyst was studied. Three adsorbents including CPC (Chinese Petroleum Corp)Talin factory spent catalyst, CPC Kaoshiung factory spent catalyst and CPC Talin factory fresh catalyst had been utilized in this study. All adsorbents were dryed at 105℃ before proceeding adsorption isotherm experiments. Parameters such as agitation time, metal ions concentration, adsorbent dose and temperature were tested. The adsorption capacity of metal ions was also evaluated. Adsorption data were then used to fit with isotherm adsorption models. Results show that the ROC spent catalyst was a good adsorbent. Data for Cu+2,Zn+2 and Cd+2 adsorption could be modeled with the Langmuir isotherm eqution. The adsorption capacity of spent catalyst increased with increasing temperature. Kinetic study also showed that the adsorption reaction can be considered to be a first order reaction. Associated with pH5.5 and 10-4M metal ion, the adsorption data fit very well with Langmuir equation. The removal ratio of Cu+2, Zn+2 and Cd+2 for Talin factory spent catalyst were all greater than 90% at 25℃.Therefore, the removal ratio of Zn+2 and Cu+2 for Kaoshiung factory spent catalyst were found to be 60% and 80% respectively. However, the removal ratio of metal ions at higher concentration were unfavorable with the value less than 60%. Keywords：Spent catalyst；adsorption；Langmuir isotherm adsorption
