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姓名 林禹妝(Yu-Chuang Lin) 查詢紙本館藏 畢業系所 化學工程與材料工程學系 論文名稱 酪胺酸酵素改質幾丁聚醣在化工廢水處理程序上之應用
(Enzymatic Grafting of Carboxyl Groups onto Chitosan to Confer Chitosan Property As Wastewaters Adsorbent)相關論文 檔案 [Endnote RIS 格式] [Bibtex 格式] [相關文章] [文章引用] [完整記錄] [館藏目錄] [檢視] [下載]
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摘要(中) 中文摘要
本研究分別將三種酚類衍生物:3,4-dihydroxy benzoic acid (DBA) , 3,4-dihydroxyphenyl acetic acid (PA) ,以及dihydrocaffeic acid (CA)在酪胺酸酵素催化下進行接枝反應於幾丁聚醣,而後以FTIR光譜驗證接枝反應確已發生,並以Amaranth (acid red27) 計算其接枝量。以此種改質之幾丁聚醣為吸附劑,研究其在工業廢水處理上,本實驗用於討論其去除水中染料、酚類與酪胺酸酵素之效果。
幾丁聚醣原為極佳的酸性染料吸附劑,但對於鹼性染料則毫無吸附力可言。接枝carboxyl group之幾丁聚醣,則同時具有對酸性及鹼性染料之吸附能力。以酪胺酸酵素進行去酚反應時,轉化出之quinone 化合物,可以幾丁聚醣吸附移除,而水溶液中殘餘的酪胺酸酵素,則可以用carboxyl group改質之幾丁聚醣吸附去除。
為比較不同carboxyl group對於鹼性染料吸附能力之影響,將改質後之幾丁聚醣對二種鹼性染料crystal violet (CV)及Bismarck brown Y (BB)作吸附實驗,發現pH值會影響吸附量,最適pH值分別為pH 7 (CV) 及 pH9 ( BB)。實驗數據顯示改質後之幾丁聚醣對二種鹼性染料之吸附行為遵循Langmiur type,而對二種鹼性染料之最大吸附量依下列順序減少CTS-CA > CTS-PA > CTS-DBA。與羧基接枝量大小順序相同。
改質之幾丁聚醣吸附酪胺酸酵素,於低濃度酪胺酸酵素時,依循一級吸附模式;高濃度酪胺酸酵素下則遵循二級吸附模式。比較不同溫度下的吸附效果,35℃下的吸附速率較4℃大,且吸附量也較大。在相同溫度下,三種改質幾丁聚醣對酪胺酸酵素的最大吸附量依序為CTS-DBA>CTS-PA>CTS-CA。摘要(英) Abstract
Phenolic compounds and dyes are commonly found in wastewaters. This study explores an enzymatic method for removal phenol and dyes from the wastewater. Three kinds of phenol derivatives: 3,4-dihydroxy benzoic acid (DBA), 3,4- dihydroxyphenyl- acetic acid (PA), hydrocaffeic acid (CA) were used individually as substrates of tyrosinase to graft onto chitosan (CTS).
FTIR analysis provided supporting evidence of phenol derivatives being grafted. The grafting conversion of these phenolic reactants on chitosan was examined by the adsorption of an anionic dye: acid red 27. Time course of enzymatic grafting reaction showed a saturated grafting extent of carboxyl groups onto chitosan. The highest content of carboxyl groups on modified chitosan beads was CTS-CA.
In this study, these modified beads were used in experiments on uptake of cationic dyes such as Crystal violet (CV) and Bismarck brown (BB). Adsorption of the cationic dyes onto modified chitosan gels is studied by batch adsorption technique at optimal pH (pH 7 for CV and pH9 for BB) under 30℃. Langmiur type adsorption was found for both dyes, and the maximum adsorption capacities were decreased with the following order CTS-CA > CTS-AA > CTS-DBA > CTS-BA.
Tyrosinase converted p-cresol to polyquinones, and polyquinones was removed by adsorbing onto chitosan beads and tyrosinase was adsorbed by those carboxyl groups modified chitosan beads. Under low concentration , tyrosinase adsorbed by modified chitosan fitted pseudo-first order kinetic model; while at high level of tyrosinase, the adsorption fitted pseudo-second order kinetic model. The maximun adsorbed capacity and adsorbed rate constant were decreased with CTS-DBA > CTS-PA > CTS-CA.關鍵字(中) ★ 染料
★ 酚類
★ 幾丁聚醣
★ 吸附
★ 酪胺酸酵素關鍵字(英) ★ phenol
★ dye
★ adsorption
★ tyrosinase
★ chitosan論文目次 目錄
中文摘要 I
Abstract II
目錄 III
圖目錄 VI
表目錄 VIII
第一章 緒論 1
第二章 文獻回顧 5
2.1 前言 5
2.2 幾丁聚醣的性質 5
2.2.1 幾丁質的來源 5
2.2.2 幾丁聚醣的製備 6
2.2.3 幾丁聚醣膜的製作 7
2.2.4 幾丁聚醣薄膜的基本性質 8
2.2.5幾丁聚醣在膠體包埋的應用性 8
2.2.6應用與市場 10
2.3吸附方程式 11
2.3.1 等溫平衡吸附 11
2.3.2 Langmuir方程式 12
2.3.3 吸附動力學 13
2.4親和層析法 15
2.4.1配基和載體的選擇 16
2.4.2親和層析技術 18
2.4.3 影響親和層析的主要因素 20
2.4.4親和層析法應用舉例 21
2.5 鹼性染料CV與BB介紹 23
2.5.1 Crystal violet, H2O 23
2.5.2 Bismarck Brown Y 24
第三章 實驗方法 25
3.1 實驗目的 25
3.2藥品與器材 28
3.2.1 實驗藥品 28
3.2.2 實驗器材 31
3.3 實驗步驟 32
3.3.1 幾丁聚醣膜 (Chitosan film) 與微小球 (Chitosan beads) 製備 32
3.3.2 酪胺酸酵素 (Tyrosinase) 之萃取 32
3.3.3 幾丁聚醣薄膜及微小球的改質 33
3.3.4 掃瞄式電子顯微鏡(SEM)表面結構觀察分析 35
3.3.5 傅立葉紅外線光譜分析FTIR(Fourier Transform Infrared) 35
3.3.6 鹼性染料的吸附 35
3.3.7 酚類吸附 35
3.3.8 酪胺酸酵素吸附 36
3.3.9 改質後幾丁聚醣微小球再利用 36
第四章 結果與討論 37
4.1 幾丁聚醣薄膜與微小球改質結果 37
4.2 掃瞄式電子顯微鏡(SEM)表面結構分析 39
4.3 傅立葉紅外線光譜儀(FTIR)分析 39
4.4羧基接枝量的計算 42
4.5鹼性染料吸附實驗 42
4.6去酚反應 52
4.7以改質之幾丁聚醣微小球吸附酪胺酸酵素實驗結果 52
4.7.1 吸附實驗結果 52
4.7.2 酪胺酸酵素脫附與幾丁聚醣微小球再吸附實驗結果 53
第五章 結論 64
參考文獻 66
圖目錄
圖1.1 quinone攻擊幾丁聚醣上胺基的反應方式 3
圖1.2 酪胺酸酵素之催化路徑,循環路徑(I) 將單酚類化合物進行羥化反應形成二酚類,循環路徑(II)將二酚類進行去氫化反應形成苯醌。 4
圖2.1 幾丁聚醣與三聚磷酸鈉的膠凝機制 9
圖2.2 幾丁聚醣與焦磷酸鹽的膠凝機制 10
圖2.3 Brunauer 之五種等溫吸附曲線分類 12
圖2.4 親和層析法的基本過程 16
圖2.5 Crystal violet在UV中的吸收峰 23
圖3.1 幾丁聚醣薄膜製備與性質測試流程圖 26
圖3.2 幾丁聚醣微小球對染料、酚類及蛋白質吸附實驗流程圖 27
圖3.3 以幾丁聚醣製備微小球之裝置 34
圖4.1 幾丁聚醣膜 37
圖4.2 幾丁聚醣微小球(Beads) 38
圖4.3 幾丁聚醣微小球表面結構分析 40
圖4.4 幾丁聚醣薄膜經接枝改質後之FTIR吸收 41
圖4.5接枝改質幾丁聚醣時,接枝量隨時間變化圖 44
圖4.6 UV/VIS吸收圖 45
圖4.7 在不同的pH操作條件下,以CTS; CTS-CA; CTS-PA; CTS-DBA吸附CV 46
圖4.8 在不同的pH操作條件下,以CTS-CA; CTS-PA; CTS-DBA吸附BB 47
圖4.9 以CTS-CA; CTS-PA; CTS-DBA恆溫吸附CV,單位吸附量對時間作圖 50
圖4.10以CTS-CA; CTS-PA; CTS-DBA恆溫吸附CV,單位吸附量對濃度作圖 51
圖4.11 以CTS-DBA; CTS-PA; CTS-CA吸附CV之Langmuir type圖形 56
圖4.12以CTS-DBA; CTS-PA; CTS-CA吸附BB之Langmuir type圖形 57
圖 4.13不同活性酪胺酸酵素之去除4-甲基酚速率 58
圖4.14 以改質後幾丁聚醣吸附低濃度酪胺酸酵素之一級吸附反應圖 60
圖4.15 以改質後幾丁聚醣吸附低濃度酪胺酸酵素之二級吸附反應圖 61
圖4.16 不同溫度下,以改質後幾丁聚醣吸附高濃度酪胺酸酵素之二級吸附反應圖 62
表目錄
表2.1膠體高分子與膠凝逆離子 9
表2.2 Bismarck Brown性質介紹 24
表4.1 以改質後幾丁聚醣微小球吸附鹼性染料之最大吸附量與反應自由能(free energy,△G0) 54
表4.2 不同酚類衍生物改質之幾丁聚醣遵循一次反應吸附低濃度酪胺酸酵素之結果 55
表4.3 不同酚類衍生物改質之幾丁聚醣在不同溫度下遵循二次反應吸附高濃度酪胺酸酵素之結果 55
表4.4 不同溫度下,改質後的幾丁聚醣吸附高濃度酪胺酸酵素之吸附量(qe) 59
表4.5 以回收的改質幾丁聚醣微小球對酪胺酸酵素進行再吸附之實驗結果 59參考文獻 S.S. Lee, S.P. Hong, M.H. Sung, Removal and bioconversion of phenol in wastewater by a thermostable β-tyrosinase, Enzyme and Microbial Technology 19:374-377, (1996).
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