以電化學陽極氧化法降解水中新興污染物

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Title:	以電化學陽極氧化法降解水中新興污染物
Other Titles:	Electrochemical Anodic Oxidation Degradation of Emerging Contaminants in Aqueous Solution
Authors:	郭宥村 Yu-Tsun Kuo
Contributors:	張瓊芬 Chiung-Fen Chang 環境科學與工程學系
Keywords:	新興汙染物;陽極電極;電化學陽極氧化程序;氫氧自由基 emerging contaminants;anodic electrodes;Electrochemical anodic oxidation process;hydroxyl radical
Date:	2014
Issue Date:	2015-04-15T03:04:26Z (UTC)
Abstract:	本研究旨在探討利用含鉑、釕及多壁奈米碳管之觸媒披覆於氟?二氧化錫導電玻璃所合成之陽極電極以電化學陽極氧化法所形成高氧化力之氫氧自由基進行水溶液中新興汙染物布洛芬、奈普森及磺胺噁唑之處理。陽極電極為利用醇還原法及旋轉塗佈法製造並使用循環伏安法鑑定電極之氧化波峰以了解陽極電極對布洛芬、奈普森及磺胺噁唑於水體中之氧化行為。其中實驗參數包含電流密度及三種新興汙染物之初始濃度，並利用總有機碳分析儀、高效能液相層析儀及超高效液相層析/四極-飛行時間式質譜儀於相異參數下分析對原物種及中間產物之濃度、降解與礦化效率，進而評估污染物之降解途徑，同時亦評估電極之使用壽命。研究結果顯示，各電極以陽極氧化法對布洛芬、奈普森及磺胺噁唑之最佳降解效率與礦化效率分別為98.9%、95.3%、98.1%與89.3%、88.1%、91.1%，而電極使用壽命評估方面則是將陽極電極連續進行重複五次之電化學實驗，數據顯示每次實驗處理效率之誤差為5%以內為可接受範圍。因此本研究所製備之電極不僅能將三種新興汙染物有效地降解、礦化，也能重複使用於電化學陽極氧化實驗中，有著高效率與穩定之特性。 This study investigated an application of an easy, flexible and feasible electrochemical anodic oxidation process on the treatment of the emerging contaminants, ibuprofen (IBU), naproxen (NAP) and sulfamethoxazole (SMX). The anodes of electrochemical anodic oxidation method utilize PT-FTO, Pt/MWCNT-FTO, RuPt-FTO, RuPt/MWCNT-FTO, Ru@Pt-FTO and Ru@Pt/MWCNT-FTO, which were prepared by polyol process and spin coating method. Results from the cyclic voltammetry three-pole analysis showed that the anodes possessed the oxidation peak to understand the treatment efficiencies of emerging contaminants in aqueous solution. The operating parameters, such as current density and initial concentration of IBU, NAP and SMX and use total organic carbon analyzer, TOC and high pressure liquid chromatography, HPLC to measure treatment efficiencies clarifying influence of each parameters. The results showed the electrodes having the brilliant degradation efficiencies and mineralization efficiencies with IBU, NAP and SMX, using electrochemical anodic oxidation method. The intermediates of three emerging contaminants also are investigated to figure out the generation mechanisms and their mineralization efficiencies by anodes in electrochemical experiment. Consequently, six of the anodes can be effectively used to degrade and mineralize the IBU, NAP and SMX, whereas higher level of treatment was observed for Ru@Pt/MWCNT-FTO anode for SMX and RuPt-FTO for IBU and NAP.
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