因二氧化錳具備氧化能力而常應用於水處理降解有機或是重金屬汙染物。本研究以流體化床反應系統合成二氧化錳與鐵氧化物雙金屬材料。廢棄鐵氧化物-BT系列具有大的比表面積(175 m2/g)、微細孔洞(0.25 nm)、表面官能基帶電性(pHpzc = 8.5 ± 1)等可吸附污染物，而披覆於BT上之二氧化錳則能氧化污染物，具有氧化與吸附之雙效特性，本研究以草酸還原過錳酸鉀及擔體顆粒利用流體化床結晶技術(FBC)合成二氧化錳/鐵氧化物雙成分材料。
吾人於流體化床研究前，先以批次化學沉澱法的瓶杯實驗(Jar-test)，先行了解於操作條件下其系統之物種氧化還原關係，藉以先行評估FBC系統中合適的操作條件。二氧化錳生成的的多寡與過錳酸鉀的降解率有關，結果顯示，在系統pH值越低的情況下有越高之過錳酸鉀降解率，因此能生成越多的二氧化錳。然而，決定系統能否生成二氧化錳之因素為草酸的添加劑量，系統草酸對過錳酸鉀之理論莫耳比為2.5，當系統草酸對過錳酸鉀之莫耳比低於1.5的情況下，系統草酸還原過錳酸鉀生成之二價錳過少，無法有效地與過錳酸根發生自催化反應生成二氧化錳；草酸對過錳酸鉀莫耳比高於2.5的情況下，則會生成過多之二價錳，同樣無法有效生成二氧化錳。
以瓶杯實驗結果作為基礎，利用流體化床結晶技術(FBC)合成錳/鐵氧化物，結果顯示在FBC系統中最適化操作條件下：CKMnO4,in = 1095 ppm，pHe = 2.36，H2C2O4/KMnO4 = 1.5，HRT = 30 min，H = 30 cm，BT擔體粒徑 = 0.71-1.0 mm，經過9個HRT的操作時間，過錳酸鉀降解率達99.9%、總有機碳(TOC)去除率達96.7%、錳結晶率(CR)達94.6 %、錳去除率(TR)為94.9 %，出流口殘餘溶解性錳濃度為9.6 ppm，二氧化錳於鐵氧化物上之披覆量可達3.7 mg-MnO2/g-BT。XRD材料鑑定FBC產品顯示錳/鐵氧化物顆粒為非晶相(Amorphous phase)之晶態，以SEM分析顯示在鐵氧化物表面生成之二氧化錳形態為奈米花狀的結構。另一方面，由EDS分析錳/鐵氧化物表面的含錳量為65.5 wt%。以BET分析BT鐵氧化物在披覆二氧化錳後，使比表面積由175上升至222 m2 g-1。
將FBC系統合成之錳/鐵氧化物產品顆粒分別對降解雙氧水及降解染料RBB之應用，結果顯示，利用錳/鐵氧化物降解雙氧水(CH2O2,i = 100 mM、pHr = 3、S/L = 10 g/L、V = 1 L)，能在100分鐘內，達到99%以上之降解率；利用錳/鐵氧化物降解染料RBB (CRBB,i = 100 ppm、pHr = 3、S/L = 10 g/L、V = 1 L)，能在240分鐘內，達到99%以上之降解率；利用錳/鐵氧化物在加入雙氧水之系統下降解染料RBB(CRBB,i = 100 ppm、CH2O2,i = 100 mM、pHr = 3、S/L = 10 g/L、V = 1 L)，能在180分鐘內，RBB染料能達到99%以上之降解率，證實錳/鐵氧化物不僅能作為吸附材，更能作為具有氧化性質之催化劑應用於處理其他汙染物。

This work successfully synthesized manganese dioxide modifing de-posited iron oxide(BT) as bimetallic MnO2/FeOOH through the chemical reduction of potassium permanganate by fluidized-bed crystallization (FBC). FBC technology could sythesize hetergeneous catalyst and solved the question from co-precipitation method consuming time and operating cost in drying and calcination . In this research, it would synthesize bime-tallic MnO2/FeOOH particles which could promote both abilities of oxida-tion and adsorption. In the synthesis of MnO2/FeOOH, the experiment was conducted at suitable conditions (CKMnO4,in = 1095 ppm, pHe = 2.36, H2C2O4/KMnO4 = 1.5, HRT = 30 min, H = 30 cm, supports diameter = 0.71-1.0 mm), the CR (Crystallization ratio of manganese) and TR (Total manganese removal) could reach up to 94.6 % and 94.9 %, the coating amount of manganese dioxide on deposited iron oxide(BT) reached up to 3.7 mg-MnO2/g-BT. For XRD and EDS analysis, the core of particle of FBC was MnO2. The BET surface area of the manganese dioxide, deter-mined by N2 adsorption, was 222 m2/g.
To examine the synthetic bimetallic MnO2/FeOOH capability of acting as a adsorbent and an oxidant. The experiments of hydrogen peroxide and azo dye Reactive Black B degradation were then carried out. The 100 mM of hydrogen peroxide could be degraded in 100 minutes. The 100 ppm of Reactive Black B also could be degraded in 240 minutes.

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