• 作者： Tan, Henry
• 中文摘要： 本文探討有關離子交換處理鉻電鍍沖洗水後,充滿重鉻酸鹽之陰離子交換床以氫氧化鈉溶液的再生操作。由圓柱具測得六價鉻之洗提曲線及氫氧化物之貫穿曲線,固定床高度,氫氧化鈉溶液濃度及流量對再生操作的影響也加以探討及審察。以固定床高度70cm,氫氧化鈉溶液濃度1.5-2mol/L,流量100-150ml/hr,流出液最高濃度可達到100g/L CrO/sub 3/,使用這些操作條件,再生液之消耗量為每mole六價鉻回收消耗1.65mole OH/sup -/。本文也嘗試以簡單分析解程式來連繫 OH/sup -/貫穿數據及六價鉻洗提數據。本研究成果可有用於對鉻電鍍程序以離子交換回收和重用鉻酸的設計及操作。
• 英文摘要： The regeneration of an anion bed saturated with dichromate ions by treatment with NaOH solution was studied in connection with the treatment of chrome plating rinse water by ion exchange. Column experiments were conducted to obtain a Cr(VI) elution curve and OH/sup -/ breakthrough curve. The parametric effects of bed height, NaOH feed concentrations, and flow rate on the performance of regeneration were investigated. It was found that for a bed height of 70cm and NaOH feed concentration of 1.5 to 2mol/L with a flow rate of 100-150mL/hr, up to a maximum concentration of 100g/L of CrO /sub 3/ could be obtained. Under the above operating conditions, the regenerant consumption is about 1.65mole of OH/sup -/ per mole of Cr(VI) recovered and the resin utilization is about 80%. An attempt is made to employ a simple analytic equation to correlate the OH/sup -/ breakthrough and Cr(VI) elution data. The results of this work may be useful in the design and operation of systems for recovery and reuse of chromic acid by ion exchange in the chrome electroplating process.
• 中文關鍵字： 離子交換; 鉻酸回收; 再生; 重鉻酸鹽
• 英文關鍵字： Ion Exchange; Chromic Acid Recovery; Regeneration; Dichromate