以含奈米零價鐵之混合薄膜反應牆進行地下水中污染物之還原處理(1/3)

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Title:	以含奈米零價鐵之混合薄膜反應牆進行地下水中污染物之還原處理(1/3) Reduction treatment of polluted groundwater using reactive hybrid-membrane barrier containing nanoscale zero-valent iron (1/3)
Authors:	余光昌陳世雄
Contributors:	環境工程與科學系
Keywords:	奈米級零價鐵薄膜反應牆硝酸鹽遲滯時間 Nanoscale zero-valent-iron reactive barrier membranes nitrate lag time
Date:	2005
Issue Date:	2008-07-31 14:37:44 (UTC+8)
Publisher:	台南縣：嘉南藥理科技大學環境工程與科學系
Abstract:	本研究乃欲結合自製的奈米級零價鐵和 PVA 薄膜，製成具活性之有機-無機混合薄膜反應牆，針對硝酸鹽(NO3 -)進行還原處理研究。結果顯示，本研究自行合成的奈米零價鐵其比表面積經過測定後為74.68±1.73m2/g，並藉由場放射電子顯微鏡(FE-SEM)進行觀察，由所得影像 (如圖1 所示)可以明顯看出，鐵粒子均呈現球型且緊密排列，經量測後其粒徑均小於100nm。而以X 光繞射儀(XRD)了解其成份結構時，發現其波峰位址對照圖譜資料庫時確認為鐵成份。此外，穿透試驗發現下列結果： (1)硝酸鹽起始濃度愈高，穿透之遲滯時間(lag time)愈短；(2) PVA 薄膜厚度愈小，穿透之遲滯時間愈短；(3) PVA 薄膜中奈米級零價金鐵含量愈大，穿透之遲滯時間愈長。 The purpose of this study is to collaborate nanoscale Fe(0) with membranes to form reactive barrier membrane for the reduction or dechlorination remediation of nitrates from groundwater under controlling of initial concentrations of pollutants, PVA membrane thickness and the content of nanoscale Fe(0) in membranes. Result reveals that the specific area of the synthesized Fe(0) is 74.68±1.73m2/g.The diameter of the synthesized Fe(0) particles could be found smaller than 100 nm by the scanning of FE-SEM. Then, the Fe(0) was confirmed by the analysis of XRD. By the breakthrough tests, the following could be found: (1)the higher the initial nitrate concentration, the shorter the lag time; (2) the thicker the PVA membrane thickness, the shorter the lag time; (3)the more the content of nanoscale Fe(0) in PVA membrane, the longer the lag time.
Appears in Collections:	[Dept. of Environmental Engineering and Science (including master's program)] MOST Project

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