乙醯氨酚之電氧化研究

Electo-oxidation of Acetaminophen

吳孟潔(Meng-Jie Wu)

指導教授 ： 黃國林

國立屏東科技大學/工學院/環境工程與科學系所/碩士(2011年)

https://doi.org/10.6346/NPUST.2011.00137

摘要

本研究係透過電化學氧化方法降解水中乙醯氨酚濃度，實驗結果顯示：白金電極＞鈦鍍白金電極＞二氧化銥電極(DSA)，電流較大及電極面積大與溫度較高時其電氧化效率較佳，1 M硫酸鈉電解液較1 M硫酸有較佳乙醯氨酚電氧化效率，CV掃描顯示pH越高乙醯氨酚氧化所需電位越低，在磷酸鹽緩衝溶液中，其電氧化效率：鹼性>中性>酸性。在雙槽中，1 M硫酸鈉(90分鐘電氧化效率=95%)>0.5 M硫酸鈉+0.5 M氫氧化鈉>1 M氫氧化鈉＞1 M硫酸＞0.5 M硫酸＋0.5 M硫酸鈉；使用單槽，乙醯氨酚電氧化效率大小依序為1 M氫氧化鈉(90分鐘電氧化效率=95%)＞0.5 M氫氧化鈉+0.5 M硫酸鈉＞1 M硫酸鈉＞1 M硫酸＞0.5 M硫酸＋0.5 M硫酸鈉。乙醯氨酚初始濃度對其電氧化效率之影響程度與陽極液、電流、電極及操作時間有關。在1 M硫酸鈉中，其電氧化效果為雙槽＞單槽，在1 M硫酸中則相反。由TOC測得乙醯氨酚礦化率為27.3%。在硫酸中添加硫酸根，可增加乙醯氨酚之電氧化效率。

關鍵字

乙醯氨酚 ； 電氧化效率 ； 降解

並列摘要

This study investigated degradation of acetaminophen (ACP) in water using electrochemical oxidation. The experimental results showed that the degradation rate of ACP on tested anodes was in order Pt > platinized > DSA. Increasing electrode area or temperature increased ACP degradation . The electrochemical degradation of ACP was better using an 1 M sodium sulfate solution as the electrolyte than using 1 M H2SO4. Cyclic voltammetry (CV) analysis showed that the higher the pH, the lower the potential required for ACP oxidation; moreover, in phosphate buffer solutions, the ACP electro-oxidation efficiency was in order basic > neutral > acidic. In the divided cell, the ACP electro-oxidation efficiency was in order 1 M Na2SO4 (90 min electro-oxidation efficiency = 95%) > 0.5 M Na2SO4 + 0.5 M NaOH > 1 M NaOH > 1 M H2SO4 > 0.5 M H2SO4 + 0.5 M Na2SO4, whereas that in the undivided cell was 1 M NaOH (90 min electro-oxidation efficiency = 95%) > 0.5 M NaOH + 0.5 M Na2SO4 > 1 M Na2SO4 > 1 M H2SO4 > 0.5 M H2SO4 + 0.5 M Na2SO4. The influence of ACP initial concentration on its electro-oxidation relied on anolyte, current, anode, and operating time. In 1 M Na2SO4, the ACP electro-oxidation was better in the divided cell than in the undivided cell, but a reverse tendency was observed in 1 M H2SO4. Partial electro-oxidized ACP was mineralized/converted to CO2. The addition of sulfate in sulfuric acid enhanced the ACP electro-oxidation efficiency.

並列關鍵字

Acetaminophen(ACP) ； Electo-oxidation ； Degradation

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