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題 名 | Characteristics of Ru-Ti Binary Oxide Electrode and Its Application in Hypochlorite Production=Ru-Ti二成分氧化物電極特性及其應用於次氯酸的生成 |
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作 者 | 楊乾信; | 書刊名 | Journal of the Chinese Institute of Chemical Engineers |
卷 期 | 30:4 1999.07[民88.07] |
頁 次 | 頁345-354 |
分類號 | 468 |
關鍵詞 | 釕鈦二成分氧化物; 電極; 次氯酸; Ruthenium-titanium binary oxide; Hypochlorite; Dye wastewater; |
語 文 | 英文(English) |
中文摘要 | 釕鈦二成分氧化物[(Ru+Ti)O2]以熱分解法塗佈於鈦基材上。利用掃描電子顯微鏡 檢視表面形態及元素分佈。電化學特性則以循環伏安法(CV)及線性掃描伏安法(LSV)加以觀察, 在(Ru+Ti)O2電極上電解產生次氯酸的電流效率(CE)及其應用於高鹽分染料廢水的分解處理 亦加以探討。含80 mol% Ti的電極(RT4)具有生成次氯酸的最高電流效率。影響次氯酸生成 電流效率的主要因素為電解質流率,電流密度,及氯離子澧度。而能量產率的主要影響因素為 電流密度,氯離子濃度及電極距離。在低電流密度(300 mAcm-2),高氯離子濃度(1 molL-1),及 0.45cm的電極距離下,可獲致高能量產率。RT4電極以300 mAcm-2電流密度應用於染料廢水中 有最佳的有機物及色素的去除效果。當通792A˙min電量予染料廢水,可將紅黑色廢水變成淡 黃色,同時化學需氧量(COD)則由10500降到1250mgL-l。 |
英文摘要 | Ruthenium-titanium binary oxides [(Ru + Ti) O2] were coated on titanium sub- strates by thermal decomposition. The surface morphologies and elemental analyses of these electrodes were examined by means of scanning electron microscopy. The electrochemical behaviors were characterized by cyclic voltammetry (CV) and linear- scan voltammetry (LSV) methods. The effects of electrolysis condition for the current efficiency (C.E.) of hypochlorite production on binary (Ru + Ti)O2 electrodes and the treatment of a high salt-containing dye wastewater using this hypochlorite were also investigated. The highest C.E. for hypochlorite production exists on an RT4 (80 mol % Ti in coating solution) electrode. The major factors influencing C.E. for hypochlorite production are the electrolyte flow rate, current density, and chloride (Cl-) concentration. Major factors affecting energy yield are current density, Cl- concentration, and electrode separation. For low current density (300 mAcm-2), high Cl- concentration (1 mol L-1), and 0.45 cm electrode separation, a high energy yield is obtained. The RT4 electrode exhibits the best removal of organics and chromophor groups in the dye wastewater. On this electrode, better removal of organics and chromophoric groups is obtained at 300mAcm-2. The color of black-red dye wastewater becomes light yellow when a charge of 792A˙min was passed, while the chemical oxygen demand (COD) of this wastewater is decreased from 10500 to 1250 mgL-1. |
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