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標題: 使用陰離子交換薄膜從水中移除反應性染料之研究
Removal of Reactive Dyes from Water Using Anion Exchange Membranes
作者: 吳政修
Wu, Jeng-Shiou
關鍵字: ion exchange membrane;離子交換薄膜;reactive dye;adsorption;desorption;反應性染料;吸附;脫附
出版社: 化學工程學系所
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本論文針對商業陰離子交換薄膜(SB6407與DE81)對反應性陰離子染料(Cibacron Blue 3GA和Cibacron Red 3BA)的批次吸附/脫附進行研究與探討。由批次實驗結果得知: pH值對染料吸附的影響不大,約可吸附95~98%的染料,只有當pH值偏高(>10)時,DE81的吸附率比起其他pH範圍低,約90%,當pH值偏低(=2)時,SB6407的吸附率比起其他pH範圍低,約92%。當鹽類存在時,濃度愈大,薄膜對染料的吸附率愈低。SB6407受Na2SO4影響最大,DE81受Na2CO3影響最大, 而染料中以Cibacron Red 3BA受鹽類影響最大。由脫附批次實驗結果得知: Cibacron Blue 3GA以SB6407薄膜吸附時,1 N KSCN於 60% 甲醇水溶液為最佳脫附劑(約70% desorption); 以DE81薄膜吸附時,1 N HCl 於 60% 甲醇水溶液為最佳脫附劑(約70% desorption)。而Cibacron Red 3BA以SB6407薄膜吸附時,1 N HCl 於 60% 甲醇水溶液為最佳脫附劑(約60% desorption) ; 以DE81薄膜吸附時,1 N NaOH於 20% 甲醇水溶液為最佳脫附劑(約60% desorption)。流動實驗分別使用流速1和8 mL/min,且模擬染料廢水的情形:溶液pH值高(>10)並加入鹽類及提高溫度(≧50℃)等,由實驗結果可看出SB6407和DE81薄膜對Cibacron Blue 3GA能有效的重覆吸附/脫附三次,當流速為1 mL/min時,有很好的吸附量約85%~100%,脫附量約82%~100%;當流速為8 mL/min時,其吸附量約66%~90%,脫附量約66%~87%。

In this study, the adsorption/desorption performance of anionic reactive dyes (Cibacron Blue 3GA and Cibacron Red 3BA) using anion exchange membranes (SB6407 and DE81) was investigated. For batch adsorption process, pH effect was insignificant except that the adsorption efficiency for DE81 membrane decreased to about 90% at pH>10 and the adsorption percentage for SB6407 membrane was reduced to about 92% at pH=2. High concentrations of salts such as Na2CO3, NaCl, and Na2SO4 greatly decrceased the adsorption capacity. In two-hour batch process, the optimal desorption solution was: 1 N KSCN in 60% methanol for Cibacron Blue 3GA from SB6407 (~70% desorption), 1 N HCl in 60% methanol for Cibacron Blue 3GA from DE81 (~70% desorption), 1 N HCl in 60% methanol for Cibacron Red 3BA from SB6407 (~60% desorption), and 1 N NaOH 20% methanol for Cibacron Red 3BA from DE81 (~60% desorption). The flow adsorption/desorption experiment was conducted at 1 mL/min or 8 mL/min and the optimal desorption conditions obtained from batch experiment were employed. The loaded dye wastewater was: reactive dye 0.05 g/L, 2 N NaCl, 0.16 g/L Na2CO3, 0.16 g/L NaOH, pH=10, 50℃. The flow process could be successfully repeated three times in serial without significant deterioration in the performance. However, only the case of removing Cibacron Blue 3GA using the SB6407 membrane at 1 mL/min could achieve high dye removal and recovery efficiencies.
其他識別: U0005-2608200715314800
Appears in Collections:化學工程學系所

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