運用TiO2/活性碳電極以電容去離子處理 NaCl 與AO7;Removal of NaCl and Acid Orange 7 by TiO2/activated carbon electrode via capacitive deionization 研 究 生：邱詩翔 指導

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Title:	運用TiO2/活性碳電極以電容去離子處理 NaCl 與AO7;Removal of NaCl and Acid Orange 7 by TiO2/activated carbon electrode via capacitive deionization 研究生：邱詩翔指導
Authors:	邱詩翔;Chiu, Shih-Siang
Contributors:	環境工程研究所
Keywords:	電容去離子;染料;二氧化鈦;dye;CDI;TiO2/activated
Date:	2019-01-17
Issue Date:	2019-04-02 15:16:06 (UTC+8)
Publisher:	國立中央大學
Abstract:	染料廢水具有導電度、色度和COD的污染，而在過去的處理常以臭氧、Fenton、化學混凝、離子交換樹脂和膜程序的技術，但由於這些技術具有高耗能和產生二次汙染的缺點。因此，選用CDI技術去除污染物的同時，也能解決上述之缺點。本研究運用TiO2/活性碳電極以電容去離子處理NaCl與AO7。藉由改變電壓來觀察Na+吸附量、AO7吸附量和電化學特性，並且以Pseudo-first-order、Pseudo-second-order、Elovich、Langmuir-Hinshelwood和Intra-particle diffusion五種動力學模式進行模擬。 AO7在CDI系統中，施加0.9 V以上發現導電度會增加，其增加推估是具有還原反應的發生，而還原反應會破壞偶氮鍵，使AO7易於降解。另外，CDI在含有NaCl和AO7的溶液下，Cl-離子的遷移率優於AO7，在吸附競爭的情況下，使AO7吸附量下降。最後Na+傾向Intra-particle diffusion動力學模式，AO7則是以Psedo-first-order和Intra-particle diffusion動力學模式。;Dye wastewater has conductivity, color and COD contamination. In the past, techniques such as ozone oxidation, Fenton, chemical coagulation, ion exchange resins, and membrane procedures were often used, but these techniques have the disadvantages of high energy consumption and secondary pollution. Therefore, the CDI technology can also solve the above shortcomings while removing pollutants. In this study, TiO2/activated carbon electrode was used to treat NaCl and AO7 by capacitive deionization. The adsorption amount of Na+, adsorption amount of AO7 and electrochemical characteristics were observed, and the kinetic of pseudo-first-order、pseudo-second-order、Elovich、Langmuir-Hinshelwood and intra-particle diffusion were aslo simulated. In CDI and three-electrode system, AO7 was found that the conductivity increases at 0.9V. The increase was estimated to have the occurrence of a reduction reaction, and it destroy the azo bond, making AO7 easy to degrade. In the solution of NaCl and AO7, the mobility of Cl- ions is better than AO7. Finally, Na+ tends to intra-particle diffusion kinetics mode, while AO7 is based on psedo-first-order and intra-particle diffusion kinetics.
Appears in Collections:	[Graduate Institute of Environmental Engineering ] Electronic Thesis & Dissertation

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