本研究針對模擬草酸廢水(100 ppm)，以過錳酸鉀和實廠流體化床回收之顆粒(BT-7)處理。BT-7經XRD、EDS、SEM、BET和雷射界面電位儀進行顆粒之物性分析。以過錳酸鉀氧化草酸，其礦化效果隨著pH的下降而逐漸地上升，其中最佳條件在pHr 3。隨著莫耳比的增加草酸的礦化效果也隨之增加，在高於理論莫耳比的條件下有沉澱物的生成，經XRD和EDS分析確認為二氧化錳，由SEM表面分析其為奈米花狀結構。在過錳酸鉀氧化草酸的同時添加BT，因為BT的吸附和催化導致TOC去除效果優於未添加BT的條件。在pHr為3、莫耳比為1、固液比為10 g/L，初始草酸濃度為150 ppm-TOC能達到最多的二氧化錳回收量，0.014 g-MnO2/g-BT，MBT。再透過反覆操作該條件來增加二氧化錳之披覆量，經由XRD、EDS和SEM分析，確認在MBT表面的沉積層為二氧化錳，最終得到鐵錳雙成分氧化物。

This study focused on the degradation of oxalic acid through KMnO4 oxidation over an iron oxide BT-7 which was the byproduct from fluidized-bed crystallization process to treat organic wastewaters in the real plant. By using XRD, EDS, SEM, BET and Zeta potential, the physical properties of BT-7 were characterized. Oxidization of oxalic acid increased with increasing molar ratio and decreasing pH. XRD and EDS analyses verified that the precipitates from KMnO4 oxidation of oxalic acid was MnO2 which was consisted of nano-flowers revealed by SEM. TOC removal in the presence of BT-7 was higher than that without BT-7 due to the catalysis and adsorption characteristics of BT-7. Under pHr 3, molar ratio of 1 and initial concentration of oxalate of 150 ppm-TOC, most of KMnO4 could be recovered as MnO2 (0.014 g-MnO2/g-BT).

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