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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 駱尚廉(Shang-Lien Lo) | |
dc.contributor.author | Yi-Ling Lin | en |
dc.contributor.author | 林怡伶 | zh_TW |
dc.date.accessioned | 2021-06-13T17:26:49Z | - |
dc.date.available | 2016-07-26 | |
dc.date.copyright | 2011-07-26 | |
dc.date.issued | 2011 | |
dc.date.submitted | 2011-07-13 | |
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Executive summary. 3M Environmental laboratory, St. Paul, MN, 2001. 李維豐、黃宛淇、廖述良,「我國全氟辛烷磺酸鹽管理制度與策略之探討」中華民國環境工程學會、環境規劃與管理研討會,2006 李育輯,「以微波活化過硫酸鹽破壞去除水中全氟辛酸之研究」,博士論文,國立台灣大學環境工程研究所,2010 張世佳,「以微波水熱法輔助過硫酸鹽降解水中全氟辛酸」,碩士論文,國立台灣大學環境工程研究所,2007 連雅棉,「紫外光活化過硫酸鹽氧化甲基第三丁基醚之研究」,國立成功大學環境工程學系,2009 環境資訊中心,「PFOA致癌 杜邦2015年停用」報導,2007 行政院環保署,「環境檢驗電子報」,2006、2010 | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/39362 | - |
dc.description.abstract | 本研究為利用過硫酸鹽將全氟辛酸(Perfluorooctanoic acid, PFOA)於室溫水溶液中降解,實驗操作在不同溫度下(20、30、40℃)、改變初始氧化劑過硫酸鹽濃度、改變初始水溶液酸鹼值,針對這些條件作全氟辛酸的降解探討。實驗結果顯示,在酸性情況下、過硫酸鹽的濃度為200 mM時的氧化速率最快,20、30、40℃其反應的半衰期分別為330、61.33、13.46個小時,溫度越高反應速率越快;但此實驗也證實在室溫的情況下過硫酸鹽對全氟辛酸還是有其氧化效力存在,在20℃反應時間達865個小時全氟辛酸還剩下14.5 %。在氧化劑過硫酸鹽的使用上,對於相同污染物濃度其消耗量大致相同,與溫度、時間無關;過硫酸鹽在整個反應過程中,除在40℃的使用量為32.9 %,其餘兩者的使用量都小於10 %,顯示過硫酸鹽在常溫未催化下的反應性的確很低。此實驗主要作用的氧化劑為過硫酸鹽溶於水後經熱活化或酸催化產生的硫酸根自由基SO4-•,過硫酸根離子本身也是很重要的氧化劑之一。所有實驗數據符合假一階方程式,反應速率常數分別為0.0515、0.0113、0.0021 h-1。此實驗方法操作成本低、設備所需簡單,具有其實際應用性。 | zh_TW |
dc.description.abstract | In this research, a treatment to decompose the persistant and bioaccumulative perfluorooctanoic acid (PFOA) in water with high concentration of persulfate (S2O82-) at ambient temperature was developed. Persulfate is an effective oxidant for PFOA degradation without using any activated technology, even at a room temperature. The objectives of this study were to investigate the influences of pH ( pH 2.5, 7, and 11) and the persulfate doses (50-200 mM) on decomposition of PFOA at 20, 30 and 40 °C. Half-lives of PFOA degradation at 20, 30, and 40 °C. were 330, 61.3, and 13.46 h, respectively. Based on the laboratory experiment results, PFOA is completely decomposed by persulfate to form shorter-chain of perfluorinated carboxylic acids (PFCAs) and fluoride ions, with defluorination efficiency reaching 97 % within 218 hours at 40 °C. When the reaction temperature is maintained at 20 °C, 65 % of PFOA is decomposed with 41 % defluorination efficiency after 865 hours of reaction. Experimental data can be well simulated with pseudo first-order kinetics as the PFOA degradation, and the rate constants are 0.002 h-1 at 20 °C, 0.011 h-1 at 30 °C, 0.052 h-1 at 40 °C. The solution temperature has a definite impact on the decomposition of PFOA by persulfate. Increasing system temperature resulted in a greater increase in PFOA degradation rates than lowering system temperature. | en |
dc.description.provenance | Made available in DSpace on 2021-06-13T17:26:49Z (GMT). No. of bitstreams: 1 ntu-100-R98541114-1.pdf: 1941425 bytes, checksum: 89ec2592e1ea59ef26edeaac91c89db1 (MD5) Previous issue date: 2011 | en |
dc.description.tableofcontents | 摘要 i
Abstract ii 總目錄 iii 圖目錄 v 表目錄 vii 第一章 緒論 1 1.1前言 1 1.2 研究目的 3 1.3研究內容 3 第二章 文獻回顧 5 2.1全氟化合物之污染及危害 5 2.2 我國全氟化合物現況 10 2.3 全氟化合物處理技術現況 13 2.4 過硫酸鹽氧化劑的實際應用 18 第三章 實驗方法與材料 27 3.1 研究架構 27 3.2實驗試劑與裝置 28 3.3 實驗分析方法 31 3.4 PFOA降解實驗 34 第四章 結果與討論 36 4.1 背景實驗控制 36 4.2 溫度對過硫酸鹽氧化全氟辛酸之影響 39 4.3 初始酸鹼值對過硫酸鹽氧化全氟辛酸之影響 49 4.4 過硫酸鹽試劑濃度實驗 58 4.5 過硫酸鹽氧化PFOA副產物形成 62 第五章 結論與建議 64 5.1結論 64 5.2建議 66 第六章 參考文獻 67 附錄 73 | |
dc.language.iso | zh-TW | |
dc.title | 利用過硫酸鹽在室溫下氧化全氟辛酸之研究 | zh_TW |
dc.title | Decomposition of Perfluorocarboxylic Acids in Aqueous Solution Using Persulfate at Ambient Temperatures | en |
dc.type | Thesis | |
dc.date.schoolyear | 99-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 闕蓓德(Pei-Te Chiueh),胡景堯 | |
dc.subject.keyword | 全氟辛酸,過硫酸鹽,室溫,化學氧化,高濃度, | zh_TW |
dc.subject.keyword | ambient temperature,perfluorooctanoic acid (PFOA),persulfate, | en |
dc.relation.page | 82 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2011-07-13 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 環境工程學研究所 | zh_TW |
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