以銀粒子修飾之靜電紡絲碳纖維電極進行電容去離子系統抗菌之研究;Electrospinning carbon fiber electrode modified by silver particles for antimicrobial assay of capacitive deionization system

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Title:	以銀粒子修飾之靜電紡絲碳纖維電極進行電容去離子系統抗菌之研究;Electrospinning carbon fiber electrode modified by silver particles for antimicrobial assay of capacitive deionization system
Authors:	郭芷君;Guo, Zhi-Jun
Contributors:	環境工程研究所
Keywords:	電容去離子;抗菌;靜電紡絲;銀粒子;capacitive deionization;antimicrobial;electrospinning;silver particle
Date:	2021-10-19
Issue Date:	2021-12-07 13:36:54 (UTC+8)
Publisher:	國立中央大學
Abstract:	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，甚至減少溫室氣體的排放。然而，水中的微生物可能會附著在電極上並形成生物膜，有造成多孔電極被堵塞並影響電吸附之隱憂。通過銀粒子廣為人知的抗菌能力和靜電紡絲的優越潛力，本研究開發用於CDI系統的修飾電極。在本研究中，0.05 CF-Ag和0.1 CF-Ag具有相似的抗菌性能，推測0.05 M的電鍍液濃度可能已經達到最大抗菌極限，故而選擇0.05 CF-Ag作為最佳電極。CF電極和0.05 CF-Ag電極的重複使用性在不含微生物的100 ppm NaCl中進行重複充電、放電循環，然後將0.05 CF-Ag電極轉移到人工調配的微生物懸浮液中進行抗菌測定。結果顯示0.05 CF-Ag的抗菌能力在多次循環後仍保持在一定水平。藉由觀察使用過後的電極表面形態特徵，證明了電極之間的差異。由於相對較優秀的抗菌能力，0.05 CF-Ag和0.1 CF-Ag上所形成的生物膜最少。結果表明本研究所製備的複合電極限制了微生物的附著。;Capacitive deionization (CDI) is a low-energy consumption technology. It is a beneficial water regeneration technology to avoid secondary waste and lower the greenhouse gas emission. The microorganism in water might attach to the electrodes and form biofilm. It was concerned that the porous electrodes might be blocked and the electrosorption might be interfered. As silver particles are well-known for their antimicrobial ability, silver particle modified electrospun carbon fiber electrodes were synthesized for the CDI system in this study. It has been found that 0.05 CF-Ag and 0.1 CF-Ag had a similar antimicrobial performance. It was speculated that the electroplate solution concentration of 0.05 M silver nitrate might reach the limit of antimicrobial ability; thus, 0.05 CF-Ag was selected as the optimal electrode. The reusability of the CF electrode and 0.05 CF Ag electrode was examined in 100 ppm NaCl without bacteria. Then the electrodes were transferred to artificial microbial suspension for antimicrobial assay. The antimicrobial ability of 0.05 CF-Ag still remained at a certain level after 16 cycles. The surface morphological characterization of used electrodes had demonstrated the differences among the electrodes. For the relatively higher antimicrobial ability, the biofilm form on the 0.05 CF-Ag and 0.1 CF Ag were the least. The results indicated the prepared silver-carbon fiber electrode limited the attachment of microorganism.
Appears in Collections:	[Graduate Institute of Environmental Engineering ] Electronic Thesis & Dissertation

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