碳觸媒氧化法應用於降解含雙酚A廢水之研究

Activated Carbon Catalyst for Catalytic Oxidation of Bisphenol-A with Hydrogen Peroxide in the Wastewater Treatment Process

本研究利用濕式含浸法將硫酸亞鐵含浸於椰殼纖維中，將其燒結成鐵型氧化觸媒，並將鐵型碳觸媒應用於濕式催化氧化系統氧化降解廢水之雙酚A。本研究中以比表面積分析儀（BET）分析碳觸媒之孔隙特性；以環境掃描式電子顯微鏡（E-SEM）觀察碳觸媒表面特性及金屬氧化物之分布狀況；以能量分散光譜儀（EDS）分析碳觸媒表面元素組成，並以高效能液相層析儀及化學需氧量定量氧化降解過後雙酚A之轉化率及化學需氧量（COD）去除率。本研究結果顯示，以鐵型金屬碳觸媒應用於氧化系統中展現顯著催化活性，利用於處理雙酚A廢水皆具有良好之轉化率及COD去除率效果。本研究之催化氧化反應顯著受反應溫度之影響，較低反應溫度時，碳觸媒之雙酚A轉化率及COD去除率普遍較低。本研究所製碳觸媒與過氧化氫應用於催化氧化雙酚A可獲100%轉化率及80%以上COD去除率，由自由基螢光反應驗證碳觸媒氧化反應機制是以氫氧自由基進行氧化降解雙酚A。

The impregnated iron sulfate in coconut shell was prepared as the active metal on the catalyst. The activated carbon catalysts were applied for oxidation of bisphenol A pollutant in batch reactor. The BET analysis was made for evaluation the effect of iron impregnating on the pore development and surface area of catalyst. The SEM-EDS technology were used to identify the iron composition on the surface of catalyst and observed the morphology of catalyst. The catalytic oxidations were carried out with the hydrogen peroxide in the reactor at suitable condition. The pollutant conversion was determined by HPLC analysis and the COD removals were determined by titration method. It was found that well BPA conversion and COD removal were shown in the test experiments. Based on the results of this investigation, it was found that hydrogen peroxide oxidation with activated carbon catalyst own a almost 100% BPA conversion and an over 80% COD removal in the oxidation. The oxidations were carried out by the free radical mechanism and the hydroxyl radical also confirmed by the fluorescence test.