電容去離子(CDI)是一種低能耗的技術，該技術有利於水的再生，可以減少處理過程中的水資源浪費，在水再生領域被視為極具有開發潛力之技術。廢污水經傳統的水處理程序之出流水包含著許多無法去除的藥物和個人保健用品(PPCPs)，雖然目前水體中的濃度極低，這些藥物的存在仍可能會使碳基電極裡之奈米孔洞積垢而使去離子性能下降。故本研究使用奈米鈦管修飾活性碳(TNTAC)電極，藉由CDI技術達成去離子之目的，加上奈米鈦管之電催化效果，期望於CDI去除水中離子的同時去除藥物。 在本研究中，TNTAC電極的去離子性能優於活性碳(AC)電極，這是由於TNT的改質提高了親水性。BET孔洞分析表明TNTAC的比表面積大於AC，這導致TNTAC對乙醯胺酚(ACT)的去除效果優於AC。在 TNTAC 電極對藥物的去除方面，無論是純溶液還是混合溶液中的 ACT，都表明由於靜電力、電極的電催化作用和介導氧化作用的增加，去除率隨著電位的增加而增加。阿斯匹靈(AS)在1.2 V的電位下表現出最好的去除效果，這可能是因為在2 V以上的電位下電解產生的氣泡附著在電極上減少了AS的去除。TNTAC電極在多次吸附-脫附實驗中表現出良好的重複使用性，這表明TNTAC電極可以增加去除離子的能力，也可同時降解藥物。 ;Capacitive deionization (CDI) was a low-energy technology, which could reduce water waste during treatment and was a beneficial for water regeneration technology. It is one of the promising technology in reclaimed water. The effluent of wastewater through the traditional water treatment process contains many pharmaceuticals and personal care products (PPCPs) which cannot be removed. Although the concentration in a water body is extremely low currently, the presence of these pharmaceuticals may still cause fouling of the nanopores in the carbon electrode and decrease deionization. Therefore, this study developed the titanium nanotube modified activated carbon (TNTAC) electrode to reduce the ion concentration in water through CDI technology. In addition, the electro-catalytic effect of the titanium nanotube could reduce the fouling of pharmaceuticals while removing ions by CDI. In this study, the deionization ability of TNTAC electrode was better than activated carbon (AC) electrode, which was due to the increased hydrophilicity by TNT modification. The BET analysis showed that the specific surface area of TNTAC was larger than AC, so that TNTAC had better acetaminophen (ACT) removal than AC. In terms of the removal of pharmaceuticals by TNTAC electrodes, the removal increased with increasing potential for both ACT and ACT/NaCl solution or in mixture solution, which might be due to increasing electrostatic, electrocatalysis by the electrode, and mediated oxidation. The removal of aspirin (AS) showed the best removal occurred at potential of 1.2 V. At 2 V, electrolysis of water might generate bubbles, which might attach to the electrode and decreased removal of AS. TNTAC electrode showed good reusability in multiple adsorption-desorption experiments which suggest that the composite of TNT can increase the ability to remove ions and also degrade PPCPs at the same time.
