廢矽藻土資源再生為多孔性材料及其應用於環境荷爾蒙之處理(III)

CNU IR > College of Sustainable Environment and Recreation > Dept. of Environmental Engineering and Science (including master's program) > MOST Project > Item 310902800/2396

Please use this identifier to cite or link to this item: https://ir.cnu.edu.tw/handle/310902800/2396

Title:	廢矽藻土資源再生為多孔性材料及其應用於環境荷爾蒙之處理(III)
Authors:	蔡文田
Contributors:	環境工程與科學系
Keywords:	二氧化鈦丙二酚-A 光催化分解反應動力學中間產物 Titanium dioxide Bisphenol-A Photocatalytic degradation Reaction Kinetics Intermediate
Date:	2005
Issue Date:	2008-07-31 14:37:48 (UTC+8)
Publisher:	台南縣：嘉南藥理科技大學環境工程與科學系
Abstract:	本研究之目的乃利用紫外線(UV/TiO2) 程序光催化分解液相中環境荷爾蒙之丙二酚 -A，探討分解丙二酚-A 的較佳條件及反應機制。另外自製複合光觸媒，探討不同的光觸媒對光催化分解丙二酚-A 的相互關係。研究結果顯示分解丙二酚-A 的較佳條件是在pH 7、溫度25℃、TiO2 劑量100mg、光照時間 60min 下，幾乎能完全分解濃度20mg/L 的丙二酚-A。比較不同的光觸媒光催化分解丙二酚-A，結果含浸純矽藻土的光觸媒光催化分解丙二酚-A 效果較好。以Langmuir-Hinshelwood 反應動力模式中之擬一階反應動力式，在改變不同溫度、 TiO2 劑量、丙二酚-A 起始濃度、pH 及光觸媒種類(含複合光觸媒)下，探討不同條件下的反應速率常數(K)。結果發現在各種條件中較高的反應速率常數(K)與上述分解丙二酚 -A 的較佳條件大致相同，因此光催化分解丙二酚-A 效率會受溫度、pH、丙二酚-A 起始濃度、TiO2 劑量及光觸媒種類(含複合光觸媒) 的影響。另外光催化分解丙二酚-A 過程會產生中間產物，這些中間產物經由GC/MS 與 HPLC 分析，推測這些主要的中間產物應為 Acetic Acid 、HQ(hydroquinone) 及 p-HAP(4-hydroxyacetophenoe)。 The objectives of this study were to destruct photocatalytically Bisphenol-A ( one of endocrine disrupting chemicals ) in the aqueous solution using UV/TiO2 process, and further investigate its optimal conditions, reaction mechanism and interactions with various photocatalysts including pure TiO2 and diatomite-impregnated TiO2. The experimental results showed that Bisphenol-A was exactly photodestructed under the process conditions of initial concentration 20mg/L 、pH 7 、 temperature 25℃、TiO2 dosage 100mg and irradiation time 60min. The destructive performance of diatomite-impregnated TiO2 and showed to be better in comparison with that of pure (non-impregnated) TiO2. With respect to the reaction kinetics, the pseudo-first order rate derived from Largmuir-Hinshelwood model was successfully used to describe the photodecomposition of Bisphenol-A in the aqueous solution under various conditions (including temperature 、TiO2 dosage 、 Bisphenol-A initial concentration 、pH and pure/impregnatated TiO2. On the other hand, the main intermediate products (i.e. acetic acid、hydroquinone and 4-hydroxyacetophenoe) of Bisphenol-A photodegradation were identified based on the analytical results of GC/MS and HPLC. The photocatalytic reaction mechanism was thus addressed to elucidate the experimental results on the basis of intermediate products in this study.
Relation:	計畫編號：NSC94-2211-E-041-025
Appears in Collections:	[Dept. of Environmental Engineering and Science (including master's program)] MOST Project

Files in This Item:

File	Description	Size	Format
NSC94-2211-E-041-025.pdf		1855Kb	Adobe PDF	1553	View/Open

Loading...