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題名 | 魷魚軟骨製備幾丁聚醣--孔隙結構與吸附特性研究=The Study of Porous Structure and Its Adsorption Characteristics by Using the Squid Cartilage Base Chitosan |
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作者 | 賀邦彥; 吳豐智; Ho, Pang-yen; Wu, Feng-chin; |
期刊 | 技術學刊 |
出版日期 | 20000900 |
卷期 | 15:3 2000.09[民89.09] |
頁次 | 頁503-509 |
分類號 | 445.46、445.46 |
語文 | chi |
關鍵詞 | 魷魚軟骨; 幾丁聚醣製備; 廢棄物資源化; 孔隙結構; 吸附特性; Squid cartilage; Chitosan; Utilization of waste material; Porous structure; Adsorption characteristics; |
中文摘要 | 本文以水產加工廢棄物魷魚軟骨為原料,探討三種平均粒徑(0.335、0.630和1.015mm),四種反應濃度(20、30、40和50wt%NaOH)和四種反應溫度(50、70、90和110℃)等不同製備條件下,幾丁聚醣之孔隙結構與吸附特性之關係。孔隙結構是利用BET比表面積儀量測孔徑分佈:吸附特性則以不同反應時間之幾丁聚醣對染料RR222和Cu(Ⅱ) 等溫振盪一天之吸附容量表示。分別獲得粒徑、NaOH濃度和反應溫度等影響因素,與吸附容量比值(Fa)之關係,以及反應時間與吸附容量關係式。結果顯示,孔隙容積隨粒徑減少和NaOH濃度增高而增高,反應溫度110℃易使β-幾丁質轉變為較緻密之α-幾丁質,孔隙容積在微孔部份有降減之趨勢。然而,較小粒徑和較高NaOH濃度,雖能增加孔隙容積,但也易破壞-NH□基。因此,對較大分子量RR222之吸附,以粒徑0.335mm,40%NaOH和反應溫度90℃最佳,而對較小分子量Cu(Ⅱ)之吸附,則以粒徑0.630mm,40%NaOH和反應溫度90℃較佳。藉此結果,闡述魷魚軟骨製備之幾丁聚醣,其物理構型與吸附現象之關係,提供生化工程應用時,基礎工程設計之參考,並為廢棄物資源化提供良好的範例。 |
英文摘要 | In this work, Chitosans were prepared by using aquatic waste material squid cartilage under the following different conditions; the average particle sizes (0.335, 0.630, 1.015mm), the concentrations of NaOH (20, 30, 40, 50, wt%) and reaction temperatures (50, 70, 90, 110℃). The relationships between the porous structure of Chitosan and its adsorption characteristics were examined. The porous distribution of Chitosan was measured by a BET specific surface area analyzer. The adsorption characteristics of Chitosan were expressed as its adsorption capacity of reactive dye RR222 and Cu(Ⅱ) ions from aqueous solutions in an isothermal shaker bath (24 hours). From the results, the adsorption capacity ratios were affected by particle sizes concentrations of NaOH and reaction temperatures, and their correlations were obtained. In addition, the correlation between the adsorption capacity and the reaction time was found. It was found that pore size distribution (by volume) increases by decreasing particle sizes and increasing the concentration of NaOH. The β-chitin easily changes to α-chitin at 100℃, and pore size distribution in micro part has a tendency to decrease. Although the smaller particle size and the higher NaOH concentration can increase the pore size distribution, they destroy the functional group –NH□. Therefore the optimal condition of adsorption for the larger molecule, RR222, is 0.335mm particle size 40wt% NaOH and 90℃, and for the smaller molecule, Cu(Ⅱ), is 0.630mm particle size, 40wt% NaOH and 90℃. An explanation of the porous structure affecting adsorption phenomena is proposed. Finally, the results may provide the basis of design for related biochemical industrial applications and promote the utilization of waste squid cartilage. |
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