Study on Photodegradation of Environmental Hormone Bisphenol-A in Aqueous Solution

• Main Authors: Ting-yii Su, 蘇庭毅
• Other Authors: Wen-tien Tsai
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/05348702517531723664

碩士 === 嘉南藥理科技大學 === 環境工程與科學系暨研究所 === 94 === 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.